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191 results on '"Catchpole, Kylie R."'

1. Fluorinated polymer additives in Spiro-OMeTAD to improve the efficiency and stability of perovskite solar cells

Author

Tabi, Grace Dansoa, Nguyen, Dang-Thuan, Liang, Wensheng, Ji, Wenzhong, Lu, Teng, Trần-Phú, Thành, Lem, Olivier Lee Cheong, Mayon, Azul Osorio, Huang, Keqing, Chang, Li-Chun, Zhan, Hualin, Ahmad, Viqar, Mahmud, Arafat, Hou, Yihui, Wang, Wei, Bui, Anh Dinh, Nguyen, Hieu, Liu, Yun, Shen, Heping, Catchpole, Kylie R., Weber, Klaus J., White, Thomas P., Walter, Daniel, and Duong, The

Published
2024
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4. Universal Strategy with Structural and Chemical Crosslinking Interface for Efficient and Stable Perovskite Solar Cells

Author

Huang, Keqing, primary, Chang, Lichun, additional, Hou, Yihui, additional, Ji, Wenzhong, additional, Trần‐Phú, Thành, additional, Bui, Anh Dinh, additional, Mayon, Azul Osorio, additional, Wang, Wei, additional, Lem, Olivier Lee Cheong, additional, Nguyen, Dang‐Thuan, additional, Tabi, Grace Dansoa, additional, Duan, Leiping, additional, Liu, Yun, additional, Shen, Heping, additional, Yang, Junliang, additional, White, Thomas P., additional, Catchpole, Kylie R., additional, Weber, Klaus J., additional, and Duong, The, additional

Published
2024
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5. The Two Faces of Capacitance: New Interpretations for Electrical Impedance Measurements of Perovskite Solar Cells and Their Relation to Hysteresis

Author

Jacobs, Daniel A., Shen, Heping, Pfeffer, Florian, Peng, Jun, White, Thomas P., Beck, Fiona J., and Catchpole, Kylie R.

Subjects
Physics - Applied Physics
Abstract

Perovskite solar cells are notorious for exhibiting transient behaviour not seen in conventional inorganic semiconductor devices. Significant inroads have been made into understanding this fact in terms of rapid ion migration, now a well-established property of the prototype photovoltaic perovskite MAPbI$_3$ and strongly implicated in the newer mixed compositions. Here we study the manifestations of ion migration in frequency-domain small-signal measurements, focusing on the popular technique of Electrical Impedance Spectroscopy (EIS). We provide new interpretations for a variety of previously puzzling features, including giant photo-induced low-frequency capacitance and negative capacitance in a variety of forms. We show that these apparently strange measurements can be rationalized by the splitting of AC current into two components, one associated with charge-storage, and the other with the quasi-steady-state recombination current of electrons and holes. The latter contribution to the capacitance can take either a positive or a negative sign, and is potentially very large when slow, voltage-sensitive processes such as ion migration are at play. Using numerical drift-diffusion semiconductor models, we show that giant photo-induced capacitance, inductive loop features, and low-frequency negative capacitance all emerge naturally as consequences of ion migration via its coupling to quasi-steady-state electron and hole currents. In doing so, we unify the understanding of EIS measurements with the comparably well-developed theory of rate dependent current-voltage (I-V) measurements in perovskite cells. Comparing the two techniques, we argue that EIS is more suitable for quantifying I-V hysteresis than conventional methods based on I-V sweeps, and demonstrate this application on a variety of cell types., Comment: Fixed typos and amended the axes on Figure 3 for clarity

Published
2018
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7. Total absorption of visible light in ultra-thin weakly-absorbing semiconductor gratings

Author

Sturmberg, Björn C. P., Chong, Teck K., Choi, Duk-Yong, White, Thomas P., Botten, Lindsay C., Dossou, Kokou B., Poulton, Christopher G., Catchpole, Kylie R., McPhedran, Ross C., and de Sterke, C. Martijn

Subjects
Physics - Optics
Abstract

The perfect absorption of light in subwavelength thickness layers generally relies on exotic materials, metamaterials or thick metallic gratings. Here we demonstrate that total light absorption can be achieved in ultra-thin gratings composed of conventional materials, including relatively weakly-absorbing semiconductors, which are compatible with optoelectronic applications such as photodetectors and optical modulators. We fabricate a 41 nm thick antimony sulphide grating structure that has a measured absorptance of A = 99.3% at a visible wavelength of 591 nm, in excellent agreement with theory. We infer that the absorption within the grating is A = 98.7%, with only A = 0.6% within the silver mirror. A planar reference sample absorbs A = 7.7% at this wavelength.

Published
2016

8. Device Performance of Emerging Photovoltaic Materials (Version 3)

Author

Almora, Osbel, primary, Baran, Derya, additional, Bazan, Guillermo C., additional, Cabrera, Carlos I., additional, Catchpole, Kylie R., additional, Erten-Ela, Sule, additional, Guo, Fei, additional, Hauch, Jens, additional, Ho-Baillie, Anita W.Y., additional, Jacobsson, T. Jesper, additional, Janssen, Rene A.J., additional, Kirchartz, Thomas, additional, Li, Yongfang, additional, Loi, Maria A., additional, Lunt, Richard R., additional, Mathew, Xavier, additional, McGehee, Michael D., additional, Min, Jie, additional, Mitzi, David B., additional, Nazeeruddin, Mohammad K., additional, Nelson, Jenny, additional, Nogueira, Ana F., additional, Paetzold, Ulrich W., additional, Park, Nam-Gyu, additional, Rand, Barry P., additional, Rau, Uwe, additional, Snaith, Henry J., additional, Unger, Eva, additional, Vaillant-Roca, Lídice, additional, Yip, Hin-Lap, additional, and Brabec, Christoph J., additional

Published
2022
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9. Above 23% Efficiency by Binary Surface Passivation of Perovskite Solar Cells Using Guanidinium and Octylammonium Spacer Cations

Author

Mozaffari, Naeimeh, primary, Duong, The, additional, Shehata, M. M., additional, Bui, Anh Dinh, additional, Pham, Huyen T., additional, Yin, Yanting, additional, Mayon, Y. Osorio, additional, Zheng, Jianghui, additional, Mahmud, Md Arafat, additional, Tabi, Grace Dansoa, additional, Andersson, Gunther G., additional, Black, Lachlan E., additional, Peng, Jun, additional, Shen, Heping, additional, White, Thomas P., additional, Weber, Klaus, additional, and Catchpole, Kylie R., additional

Published
2022
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12. Device Performance of Emerging Photovoltaic Materials (Version 2)

Author

Almora, Osbel, primary, Baran, Derya, additional, Bazan, Guillermo C., additional, Berger, Christian, additional, Cabrera, Carlos I., additional, Catchpole, Kylie R., additional, Erten‐Ela, Sule, additional, Guo, Fei, additional, Hauch, Jens, additional, Ho‐Baillie, Anita W. Y., additional, Jacobsson, T. Jesper, additional, Janssen, Rene A. J., additional, Kirchartz, Thomas, additional, Kopidakis, Nikos, additional, Li, Yongfang, additional, Loi, Maria A., additional, Lunt, Richard R., additional, Mathew, Xavier, additional, McGehee, Michael D., additional, Min, Jie, additional, Mitzi, David B., additional, Nazeeruddin, Mohammad K., additional, Nelson, Jenny, additional, Nogueira, Ana F., additional, Paetzold, Ulrich W., additional, Park, Nam‐Gyu, additional, Rand, Barry P., additional, Rau, Uwe, additional, Snaith, Henry J., additional, Unger, Eva, additional, Vaillant‐Roca, Lídice, additional, Yip, Hin‐Lap, additional, and Brabec, Christoph J., additional

Published
2021
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16. Combined Bulk and Surface Passivation in Dimensionally Engineered 2D‐3D Perovskite Films via Chlorine Diffusion

Author

Mahmud, Md Arafat, primary, Pham, Huyen T., additional, Duong, The, additional, Yin, Yanting, additional, Peng, Jun, additional, Wu, Yiliang, additional, Liang, Wensheng, additional, Li, Li, additional, Kumar, Anand, additional, Shen, Heping, additional, Walter, Daniel, additional, Nguyen, Hieu T., additional, Mozaffari, Naeimeh, additional, Tabi, Grace Dansoa, additional, Andersson, Gunther, additional, Catchpole, Kylie R., additional, Weber, Klaus J., additional, and White, Thomas P., additional

Published
2021
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17. Contactless and Spatially Resolved Determination of Current−Voltage Curves in Perovskite Solar Cells via Photoluminescence

Author

Bui, Anh Dinh, primary, Mahmud, Md Arafat, additional, Mozaffari, Naeimeh, additional, Basnet, Rabin, additional, Duong, The, additional, Bartholazzi, Gabriel, additional, Le, Tien T., additional, Truong, Thien N., additional, Tebyetekerwa, Mike, additional, Wibowo, Ary, additional, Weber, Klaus J., additional, White, Thomas P., additional, Catchpole, Kylie R., additional, Macdonald, Daniel, additional, and Nguyen, Hieu T., additional

Published
2021
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18. Electrical properties of perovskite solar cells by illumination intensity and temperature‐dependent photoluminescence imaging.

Author

Bui, Anh Dinh, Mozaffari, Naeimeh, Truong, Thien N., Duong, The, Weber, Klaus J., White, Thomas P., Catchpole, Kylie R., Macdonald, Daniel, and Nguyen, Hieu T.

Subjects
SOLAR cells, PEROVSKITE, OPEN-circuit voltage, LIGHTING, ACTIVATION energy
Abstract

Hybrid organic–inorganic perovskite solar cells (PSCs) are one of the most promising candidates for next generation photovoltaics. Further improvement in their performance, particularly efficiency, durability and reproducibility, requires a deep understanding of recombination losses during fabrication and within a device itself. In this work, we report a contactless, imaging‐based procedure to spatially resolve electronic properties of PSCs including implied open‐circuit voltage (iVoc) and its temperature coefficient, ideality factor (nid) and activation energy of recombination (EA) by employing illumination intensity and temperature‐dependent photoluminescence. The illumination intensity dependence of iVoc allows the extraction of nid whereas its temperature dependence allows the extraction of the temperature coefficient and EA. This imaging approach is then applied to investigate changes of these electronic parameters on fully and partially fabricated devices. [ABSTRACT FROM AUTHOR]

Published
2022
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20. Device Performance of Emerging Photovoltaic Materials (Version 2)

Author

Almora, Osbel, Baran, Derya, Bazan, Guillermo C., Berger, Christian, Cabrera, Carlos, I, Catchpole, Kylie R., and Erten-Ela, Sule

Subjects
Lead Iodide Perovskites, photovoltaic device operational stability, Open-Circuit Voltage, Record-Efficiency, transparent and semitransparent solar cells, In-Situ Preparation, Inorganic Perovskite, bandgap energy, Detailed Balance Limit, emerging photovoltaics, Highly Efficient, tandem solar cells, flexible photovoltaics, Long-Term Stability, Perovskite Solar-Cells, Power Conversion Efficiency
Abstract

Following the 1st release of the Emerging photovoltaic (PV) reports, the best achievements in the performance of emerging photovoltaic devices in diverse emerging photovoltaic research subjects are summarized, as reported in peer-reviewed articles in academic journals since August 2020. Updated graphs, tables, and analyses are provided with several performance parameters, e.g., power conversion efficiency, open-circuit voltage, short-circuit current density, fill factor, light utilization efficiency, and stability test energy yield. These parameters are presented as a function of the photovoltaic bandgap energy and the average visible transmittance for each technology and application and are put into perspective using, e.g., the detailed balance efficiency limit. The 2nd instalment of the Emerging PV reports extends the scope toward tandem solar cells and presents the current state-of-the-art in tandem solar cell performance for various material combinations., European Union [871336]; DFG [INST 90/917-1 FUGG, SFB 953, 182849149, IGK 2495]; grant ELF-PVDesign and development of solution processed functional materials for the next generations of PV technologies [44-6521a/20/4]; grant Solar Factory of the Future [FKZ 20.2-3410.5-4-5]; SolTech Initiative by the Bavarian State Government; FAPESP [2017/11986-5]; Shell; ANP (Brazil's National Oil, Natural Gas and Biofuels Agency) through the R&D levy regulation; National Science Foundation [CBET-1702591]; US Department of Energy Office of Energy Efficiency and Renewable Energy Solar Energy Technologies Office [34351]; Projekt DEAL, O.A. acknowledges the financial support from European Union's Horizon 2020 research and innovation program under the Photonics Public Private Partnership (www.photonics21.org) with the project PEROXIS under the Grant Agreement No. 871336. C.J.B. acknowledges funding from DFG within INST 90/917-1 FUGG, the SFB 953 (DFG, Project No. 182849149) and the IGK 2495 (Energy Conversion Systems-from Materials to Devices). C.J.B. further acknowledges the grants ELF-PVDesign and development of solution processed functional materials for the next generations of PV technologies (No. 44-6521a/20/4) and Solar Factory of the Future (FKZ 20.2-3410.5-4-5) and the SolTech Initiative by the Bavarian State Government. A.F.N. acknowledges support from FAPESP (Grant 2017/11986-5), Shell and the strategic importance of the support given by ANP (Brazil's National Oil, Natural Gas and Biofuels Agency) through the R&D levy regulation. R.R.L. gratefully acknowledges support from the National Science Foundation under grant CBET-1702591. N.K. acknowledges funding by the US Department of Energy Office of Energy Efficiency and Renewable Energy Solar Energy Technologies Office, Agreement Number 34351.; Open access funding enabled and organized by Projekt DEAL.

Published
2021

21. Origin of Efficiency and Stability Enhancement in High‐Performing Mixed Dimensional 2D‐3D Perovskite Solar Cells: A Review

Author

Mahmud, Md Arafat, primary, Duong, The, additional, Peng, Jun, additional, Wu, Yiliang, additional, Shen, Heping, additional, Walter, Daniel, additional, Nguyen, Hieu T., additional, Mozaffari, Naeimeh, additional, Tabi, Grace Dansoa, additional, Catchpole, Kylie R., additional, Weber, Klaus J., additional, and White, Thomas P., additional

Published
2021
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22. Reporting Device Performance of Emerging Photovoltaic Materials (Version 1)

Author

Almora, Osbel, primary, Baran, Derya, additional, Bazan, Guillermo C, additional, Cabrera, Carlos I, additional, Catchpole, Kylie R, additional, Erten-Ela, Sule, additional, Guo, Fei, additional, Hauch, Jens, additional, Ho-Baillie, Anita W Y, additional, Jacobsson, T Jesper, additional, Janssen, Rene A J, additional, Kirchartz, Thomas, additional, Kopidakis, Nikos, additional, Li, Yongfang, additional, Loi, Maria A, additional, Lunt, Richard R, additional, Mathew, Xavier, additional, Mcgehee, Michael D, additional, Min, Jie, additional, Mitzi, David B, additional, Nazeeruddin, Mohammad K, additional, Nelson, Jenny, additional, Nogueira, Ana F, additional, Paetzold, Ulrich W, additional, Park, Nam-Gyu, additional, Rand, Barry P, additional, Rau, Uwe, additional, Snaith, Henry J, additional, Unger, Eva, additional, Vaillant-Roca, Lídice, additional, Yip, Hin-Lap, additional, and Brabec, Christoph J, additional

Published
2021
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24. Anion Exchange‐Induced Crystal Engineering via Hot‐Pressing Sublimation Affording Highly Efficient and Stable Perovskite Solar Cells

Author

Ding, Bin, primary, Peng, Jun, additional, Chu, Qian-Qian, additional, Zhao, Shenyou, additional, Shen, Heping, additional, Weber, Klaus J., additional, Yang, Guan-Jun, additional, White, Thomas P., additional, Catchpole, Kylie R., additional, Nazeeruddin, Mohammad Khaja, additional, and Dyson, Paul J., additional

Published
2021
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25. Nanoscale localized contacts for high fill factors in polymer-passivated perovskite solar cells

Author

Peng, Jun, primary, Walter, Daniel, additional, Ren, Yuhao, additional, Tebyetekerwa, Mike, additional, Wu, Yiliang, additional, Duong, The, additional, Lin, Qiaoling, additional, Li, Juntao, additional, Lu, Teng, additional, Mahmud, Md Arafat, additional, Lem, Olivier Lee Cheong, additional, Zhao, Shenyou, additional, Liu, Wenzhu, additional, Liu, Yun, additional, Shen, Heping, additional, Li, Li, additional, Kremer, Felipe, additional, Nguyen, Hieu T., additional, Choi, Duk-Yong, additional, Weber, Klaus J., additional, Catchpole, Kylie R., additional, and White, Thomas P., additional

Published
2021
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26. Device Performance of Emerging Photovoltaic Materials (Version 1)

Author

Almora, Osbel, primary, Baran, Derya, additional, Bazan, Guillermo C., additional, Berger, Christian, additional, Cabrera, Carlos I., additional, Catchpole, Kylie R., additional, Erten‐Ela, Sule, additional, Guo, Fei, additional, Hauch, Jens, additional, Ho‐Baillie, Anita W. Y., additional, Jacobsson, T. Jesper, additional, Janssen, Rene A. J., additional, Kirchartz, Thomas, additional, Kopidakis, Nikos, additional, Li, Yongfang, additional, Loi, Maria A., additional, Lunt, Richard R., additional, Mathew, Xavier, additional, McGehee, Michael D., additional, Min, Jie, additional, Mitzi, David B., additional, Nazeeruddin, Mohammad K., additional, Nelson, Jenny, additional, Nogueira, Ana F., additional, Paetzold, Ulrich W., additional, Park, Nam‐Gyu, additional, Rand, Barry P., additional, Rau, Uwe, additional, Snaith, Henry J., additional, Unger, Eva, additional, Vaillant‐Roca, Lídice, additional, Yip, Hin‐Lap, additional, and Brabec, Christoph J., additional

Published
2020
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27. In Situ Formation of Mixed‐Dimensional Surface Passivation Layers in Perovskite Solar Cells with Dual‐Isomer Alkylammonium Cations

Author

Mahmud, Md Arafat, primary, Duong, The, additional, Yin, Yanting, additional, Peng, Jun, additional, Wu, Yiliang, additional, Lu, Teng, additional, Pham, Huyen T., additional, Shen, Heping, additional, Walter, Daniel, additional, Nguyen, Hieu T., additional, Mozaffari, Naeimeh, additional, Tabi, Grace Dansoa, additional, Liu, Yun, additional, Andersson, Gunther, additional, Catchpole, Kylie R., additional, Weber, Klaus J., additional, and White, Thomas P., additional

Published
2020
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28. Origin of Efficiency and Stability Enhancement in High‐Performing Mixed Dimensional 2D‐3D Perovskite Solar Cells: A Review.

Author

Mahmud, Md Arafat, Duong, The, Peng, Jun, Wu, Yiliang, Shen, Heping, Walter, Daniel, Nguyen, Hieu T., Mozaffari, Naeimeh, Tabi, Grace Dansoa, Catchpole, Kylie R., Weber, Klaus J., and White, Thomas P.

Subjects
SOLAR cells, PHOTOVOLTAIC power systems, PEROVSKITE, KEY performance indicators (Management), BUSINESS consultants, PHOTOVOLTAIC power generation
Abstract

Perovskite solar cells are a potential game changer for the photovoltaics industry, courtesy of their facile fabrication and high efficiency. Despite this, commercialization is being held back by poor stability. To become economically feasible for commercial production, perovskite solar cells must meet or exceed industry standards for operational lifetime and reliability. In this regard, mixed dimensional 2D‐3D perovskite solar cells, incorporating long carbon‐chain organic spacer cations, have shown promising results, with enhancement in both device efficiency and stability. Dimensional engineering of perovskite films requires a delicate balance of 2D and 3D perovskite composition to take advantage of the specific properties of each material phase. This review summarizes and assesses the current understanding, and apparent contradictions in the state‐of‐the‐art mixed dimensional perovskite solar cell literature regarding the origin of stability and performance enhancement. By combining and comparing results from experimental and theoretical studies it is focused on how the perovskite composition, film formation methods, additive and solvent engineering influence efficiency and stability, and identify future research directions to further improve both key performance metrics. [ABSTRACT FROM AUTHOR]

Published
2022
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29. Ultrathin HfO2 passivated silicon photocathodes for efficient alkaline water splitting.

Author

Zhang, Doudou, Liang, Wensheng, Sharma, Astha, Butson, Joshua D., Saraswathyvilasam, Aswani Gopakumar, Beck, Fiona J., Catchpole, Kylie R., and Karuturi, Siva

Subjects
PHOTOCATHODES, ATOMIC layer deposition, SURFACE passivation, THICK films, ENERGY conversion, CHEMICAL stability
Abstract

HfO2 has many favorable characteristics for use in energy conversion devices including high thermodynamic stability, good chemical stability in corrosive electrolytes, high refractive index, and wide bandgap. Here, we report surface passivation of a c-Si photocathode by ultrathin HfO2 prepared using atomic layer deposition as an effective approach for enhancing its photoelectrochemical (PEC) performance. The effect of the thickness of HfO2, deposition temperature, and annealing in forming gas on the passivation performance are systematically investigated. We demonstrate that the Si photocathode with a p+/n/n+ structure decorated with a Ni3N/Ni cocatalyst and an HfO2 interlayer follows a metal–insulator–semiconductor mechanism with thicker HfO2 films proving detrimental to the PEC performance. The Si photocathode passivated with a 1 nm HfO2 layer exhibits an enhancement in the onset potential by 100 mV, an applied-bias photon-to-current efficiency of 9%, and improved operational stability. This work provides insights into the application of HfO2 as a passivating layer for Si photoelectrodes for solar hydrogen production. [ABSTRACT FROM AUTHOR]

Published
2021
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30. Efficient Passivation and Low Resistivity for p+-Si/TiO2 Contact by Atomic Layer Deposition

Author

Mozaffari, Naeimeh, primary, Shen, Heping, additional, Yin, Yanting, additional, Li, Yueliang, additional, Hiller, Daniel, additional, Jacobs, Daniel A., additional, Nguyen, Hieu T., additional, Phang, Pheng, additional, Andersson, Gunther G., additional, Kaiser, Ute, additional, White, Thomas P., additional, Weber, Klaus, additional, and Catchpole, Kylie R., additional

Published
2020
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32. Double‐Sided Surface Passivation of 3D Perovskite Film for High‐Efficiency Mixed‐Dimensional Perovskite Solar Cells

Author

Mahmud, Md Arafat, primary, Duong, The, additional, Yin, Yanting, additional, Pham, Huyen T., additional, Walter, Daniel, additional, Peng, Jun, additional, Wu, Yiliang, additional, Li, Li, additional, Shen, Heping, additional, Wu, Nandi, additional, Mozaffari, Naeimeh, additional, Andersson, Gunther, additional, Catchpole, Kylie R., additional, Weber, Klaus J., additional, and White, Thomas P., additional

Published
2019
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34. Device Performance of Emerging Photovoltaic Materials (Version 1).

Author

Almora, Osbel, Baran, Derya, Bazan, Guillermo C., Berger, Christian, Cabrera, Carlos I., Catchpole, Kylie R., Erten‐Ela, Sule, Guo, Fei, Hauch, Jens, Ho‐Baillie, Anita W. Y., Jacobsson, T. Jesper, Janssen, Rene A. J., Kirchartz, Thomas, Kopidakis, Nikos, Li, Yongfang, Loi, Maria A., Lunt, Richard R., Mathew, Xavier, McGehee, Michael D., and Min, Jie

Subjects
BUILDING-integrated photovoltaic systems, ELECTRIC power production, SOLAR cells, PHOTOVOLTAIC power generation
Abstract

Emerging photovoltaics (PVs) focus on a variety of applications complementing large scale electricity generation. Organic, dye‐sensitized, and some perovskite solar cells are considered in building integration, greenhouses, wearable, and indoor applications, thereby motivating research on flexible, transparent, semitransparent, and multi‐junction PVs. Nevertheless, it can be very time consuming to find or develop an up‐to‐date overview of the state‐of‐the‐art performance for these systems and applications. Two important resources for recording research cells efficiencies are the National Renewable Energy Laboratory chart and the efficiency tables compiled biannually by Martin Green and colleagues. Both publications provide an effective coverage over the established technologies, bridging research and industry. An alternative approach is proposed here summarizing the best reports in the diverse research subjects for emerging PVs. Best performance parameters are provided as a function of the photovoltaic bandgap energy for each technology and application, and are put into perspective using, e.g., the Shockley–Queisser limit. In all cases, the reported data correspond to published and/or properly described certified results, with enough details provided for prospective data reproduction. Additionally, the stability test energy yield is included as an analysis parameter among state‐of‐the‐art emerging PVs. [ABSTRACT FROM AUTHOR]

Published
2021
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36. Extracting optical bandgaps from luminescence images of perovskite solar cells

Author

Nguyen, Hieu T., primary, White, Thomas P., additional, Catchpole, Kylie R., additional, Macdonald, Daniel, additional, Chen, Boyi, additional, Peng, Jun, additional, Shen, Heping, additional, Duong, The, additional, Walter, Daniel, additional, Johnston, Steve, additional, Al-Jassim, Mowafak M., additional, and Weber, Klaus J., additional

Published
2019
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38. Perovskite Solar Cells: Imaging Spatial Variations of Optical Bandgaps in Perovskite Solar Cells (Adv. Energy Mater. 7/2019)

Author

Chen, Boyi, primary, Peng, Jun, additional, Shen, Heping, additional, Duong, The, additional, Walter, Daniel, additional, Johnston, Steve, additional, Al-Jassim, Mowafak M., additional, Weber, Klaus J., additional, White, Thomas P., additional, Catchpole, Kylie R., additional, Macdonald, Daniel, additional, and Nguyen, Hieu T., additional

Published
2019
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39. Light-activated inorganic CsPbBr2I perovskite for room-temperature self-powered chemical sensing

Author

Chen, Hongjun, primary, Zhang, Meng, additional, Fu, Xiao, additional, Fusco, Zelio, additional, Bo, Renheng, additional, Xing, Bobo, additional, Nguyen, Hieu T., additional, Barugkin, Chog, additional, Zheng, Jianghui, additional, Lau, Cho Fai Jonathan, additional, Huang, Shujuan, additional, Ho-Baillie, Anita W. Y., additional, Catchpole, Kylie R., additional, and Tricoli, Antonio, additional

Published
2019
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40. Imaging Spatial Variations of Optical Bandgaps in Perovskite Solar Cells

Author

Chen, Boyi, primary, Peng, Jun, additional, Shen, Heping, additional, Duong, The, additional, Walter, Daniel, additional, Johnston, Steve, additional, Al‐Jassim, Mowafak M., additional, Weber, Klaus J., additional, White, Thomas P., additional, Catchpole, Kylie R., additional, Macdonald, Daniel, additional, and Nguyen, Hieu T., additional

Published
2018
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42. In situ recombination junction between p-Si and TiO 2 enables high-efficiency monolithic perovskite/Si tandem cells

Author

Shen, Heping, primary, Omelchenko, Stefan T., additional, Jacobs, Daniel A., additional, Yalamanchili, Sisir, additional, Wan, Yimao, additional, Yan, Di, additional, Phang, Pheng, additional, Duong, The, additional, Wu, Yiliang, additional, Yin, Yanting, additional, Samundsett, Christian, additional, Peng, Jun, additional, Wu, Nandi, additional, White, Thomas P., additional, Andersson, Gunther G., additional, Lewis, Nathan S., additional, and Catchpole, Kylie R., additional

Published
2018
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43. Perovskite Solar Cells Employing Copper Phthalocyanine Hole-Transport Material with an Efficiency over 20% and Excellent Thermal Stability

Author

Duong, The, primary, Peng, Jun, additional, Walter, Daniel, additional, Xiang, Jin, additional, Shen, Heping, additional, Chugh, Dipankar, additional, Lockrey, Mark, additional, Zhong, Dingyong, additional, Li, Juntao, additional, Weber, Klaus, additional, White, Thomas P., additional, and Catchpole, Kylie R., additional

Published
2018
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44. A Universal Double‐Side Passivation for High Open‐Circuit Voltage in Perovskite Solar Cells: Role of Carbonyl Groups in Poly(methyl methacrylate)

Author

Peng, Jun, primary, Khan, Jafar I., additional, Liu, Wenzhu, additional, Ugur, Esma, additional, Duong, The, additional, Wu, Yiliang, additional, Shen, Heping, additional, Wang, Kai, additional, Dang, Hoang, additional, Aydin, Erkan, additional, Yang, Xinbo, additional, Wan, Yimao, additional, Weber, Klaus J., additional, Catchpole, Kylie R., additional, Laquai, Frédéric, additional, De Wolf, Stefaan, additional, and White, Thomas P., additional

Published
2018
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46. Superior Self‐Charged and ‐Powered Chemical Sensing with High Performance for NO2 Detection at Room Temperature.

Author

Chen, Hongjun, Zhang, Meng, Xing, Bobo, Fu, Xiao, Bo, Renheng, Mulmudi, Hemant Kumar, Huang, Shujuan, Ho‐Baillie, Anita W. Y., Catchpole, Kylie R., and Tricoli, Antonio

Subjects
CHEMICAL detectors, DETECTION limit, NITROGEN dioxide, POWER resources
Abstract

Halide based lead perovskites are recently being explored as efficient light harvesters for optoelectronics devices. Here, some new insights on the self‐charging and energy‐storage of triple cation FA0.80MA0.15Cs0.05PbI2.55Br0.45 (FMCPIB) perovskites based devices with the application for self‐powered chemical sensing are presented. It is demonstrated that under light irradiation a self‐powered FMCPIB based device can detect particle per million (ppm) concentrations of nitrogen dioxide (NO2) with a swift response and recovery time of ≈17 and ≈126 s at room temperature, respectively. Most notably, the energy‐storage feature enables FMCPIB based devices like a photo‐capacitor, and then remain operational for another 1.7 h in darkness for the detection of NO2 without external power supply. Besides, the FMCPIB based devices can also be operated with a 1 V bias achieving a detection limit 0.2 ppm of NO2 at room temperature. Through analysis, it reveals that the high performance for NO2 can be ascribed to the special NO2‐amine interaction with the cations of FMCPIB and the storage capacitance might be due to the accumulation of charges at the TiO2/FMCPIB/carbon interfaces under light irradiation. These appealing features of FMCPIB perovskites based chemical sensors might find potential applications in monitoring of toxic gas emission and public space safety. [ABSTRACT FROM AUTHOR]

Published
2020
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47. Monolithic Perovskite/Si Tandem Solar Cells: Pathways to Over 30% Efficiency.

Author

Shen, Heping, Walter, Daniel, Wu, Yiliang, Fong, Kean Chern, Jacobs, Daniel A., Duong, The, Peng, Jun, Weber, Klaus, White, Thomas P., and Catchpole, Kylie R.

Subjects
SILICON solar cells, SOLAR cells, PEROVSKITE, OPTICAL losses, SURFACE passivation, DENSITY currents
Abstract

The article commences with a review focusing on three critical aspects of the perovskite/Si tandem technology: the evolution of efficiencies to date, comparisons of Si subcell choices, and the interconnection design strategies. Building on this review, a clear route is provided for minimizing optical losses aided by optical simulations of a recently reported high‐efficiency perovskite/Si tandem system, optimizations which result in tandem current densities of ≈20 mAcm−2 with front‐side texture. The primary focus is on electrical modeling on the Si‐subcell, in order to understand the efficiency potential of this cell under filtered light in a tandem configuration. The possibility of increasing the Si subcell efficiency by 1% absolute is offered through joint improvements to the bulk lifetime, which exceeds 4 ms, and improves surface passivation quality to saturation current densities below 10 fA cm−2. Polycrystalline‐Si/SiOx passivating contacts are proposed as a promising alternative to partial‐area rear contacts, with the potential for further simplifying cell fabrication and improving device performance. A combination of optical modeling of the complete tandem structure alongside electrical modeling of the Si‐subcell, both with state‐of‐the‐art modeling tools, provides the first complete picture of the practical efficiency potential of perovskite/Si tandems. [ABSTRACT FROM AUTHOR]

Published
2020
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48. Light-activated inorganic CsPbBr2I perovskite for room-temperature self-powered chemical sensing.

Author

Chen, Hongjun, Zhang, Meng, Fu, Xiao, Fusco, Zelio, Bo, Renheng, Xing, Bobo, Nguyen, Hieu T., Barugkin, Chog, Zheng, Jianghui, Lau, Cho Fai Jonathan, Huang, Shujuan, Ho-Baillie, Anita W. Y., Catchpole, Kylie R., and Tricoli, Antonio

Abstract

Halide perovskite materials are excellent light harvesters that have generated enormous interest for photovoltaic technology and an increasing number of other optoelectronic applications. Very recently, their use for miniaturized chemical sensors has shown a promising room-temperature response. Here, we present some insights on the use of CsPbBr2I (CPBI) perovskites for self-powered room-temperature sensing of several environmentally and medically relevant compounds demonstrating rapid detection of down to concentrations of 1 ppm. Notably, the photocurrent of these self-powered CPBI-based devices increases under exposure to both reducing (e.g. acetone, propane) and oxidizing (e.g. NO2, O2) gas molecules and decreases rapidly upon reverting to an inert atmosphere. In situ photoluminescence (PL) analysis of the CPBI during exposure to oxidizing molecules reveals a strongly increased PL intensity and longer lifetime indicating a prevalent role of CPBI trap states in the sensing mechanism. These findings provide new insights for the engineering of perovskite-based materials for their future chemical sensing applications. [ABSTRACT FROM AUTHOR]

Published
2019
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