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1,695 results on '"Nazeeruddin Mohammad Khaja"'

1. Micro-homogeneity of lateral energy landscapes governs the performance in perovskite solar cells

Author

Shi, Pengju, Ding, Bin, Jin, Donger, Oner, Muratcan, Zhang, Xu, Tian, Yuan, Li, Yahui, Zhao, Ke, Sun, Zengyi, Xu, Jiazhe, Zhang, Shaochen, Lai, Runchen, Xiao, Lingyu, Wang, Chenyue, Değer, Caner, Tian, Liuwen, Shen, Jiahui, Cheng, Yuan, Yavuz, Ilhan, Miao, Xiaohe, Shi, Enzheng, Yang, Deren, Ding, Yong, Nazeeruddin, Mohammad Khaja, Wang, Rui, and Xue, Jingjing

Published
2024
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2. Strain relaxation and multidentate anchoring in n-type perovskite transistors and logic circuits

Author

Bukke, Ravindra Naik, Syzgantseva, Olga A., A. Syzgantseva, Maria, Aidinis, Konstantinos, Soultati, Anastasia, Verykios, Apostolis, Tountas, Marinos, Psycharis, Vassilis, Alshahrani, Thamraa, Ullah, Habib, P. Zorba, Leandros, C. Vougioukalakis, Georgios, Wang, Jianxiao, Bao, Xichang, Jang, Jin, Nazeeruddin, Mohammad Khaja, Vasilopoulou, Maria, and Mohd Yusoff, Abd. Rashid bin

Published
2024
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3. Dopant-additive synergism enhances perovskite solar modules

Author

Ding, Bin, Ding, Yong, Peng, Jun, Romano-deGea, Jan, Frederiksen, Lindsey E. K., Kanda, Hiroyuki, Syzgantseva, Olga A., Syzgantseva, Maria A., Audinot, Jean-Nicolas, Bour, Jerome, Zhang, Song, Wirtz, Tom, Fei, Zhaofu, Dörflinger, Patrick, Shibayama, Naoyuki, Niu, Yunjuan, Hu, Sixia, Zhang, Shunlin, Tirani, Farzaneh Fadaei, Liu, Yan, Yang, Guan-Jun, Brooks, Keith, Hu, Linhua, Kinge, Sachin, Dyakonov, Vladimir, Zhang, Xiaohong, Dai, Songyuan, Dyson, Paul J., and Nazeeruddin, Mohammad Khaja

Published
2024
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4. Oriented nucleation in formamidinium perovskite for photovoltaics

Author

Shi, Pengju, Ding, Yong, Ding, Bin, Xing, Qiyu, Kodalle, Tim, Sutter-Fella, Carolin M, Yavuz, Ilhan, Yao, Canglang, Fan, Wei, Xu, Jiazhe, Tian, Yuan, Gu, Danyu, Zhao, Ke, Tan, Shaun, Zhang, Xu, Yao, Libing, Dyson, Paul J, Slack, Jonathan L, Yang, Deren, Xue, Jingjing, Nazeeruddin, Mohammad Khaja, Yang, Yang, and Wang, Rui

Subjects
Macromolecular and Materials Chemistry, Chemical Sciences, Physical Chemistry, Engineering, Materials Engineering, General Science & Technology
Abstract

The black phase of formamidinium lead iodide (FAPbI3) perovskite shows huge promise as an efficient photovoltaic, but it is not favoured energetically at room temperature, meaning that the undesirable yellow phases are always present alongside it during crystallization1-4. This problem has made it difficult to formulate the fast crystallization process of perovskite and develop guidelines governing the formation of black-phase FAPbI3 (refs. 5,6). Here we use in situ monitoring of the perovskite crystallization process to report an oriented nucleation mechanism that can help to avoid the presence of undesirable phases and improve the performance of photovoltaic devices in different film-processing scenarios. The resulting device has a demonstrated power-conversion efficiency of 25.4% (certified 25.0%) and the module, which has an area of 27.83 cm2, has achieved an impressive certified aperture efficiency of 21.4%.

Published
2023

7. Photophysics of Deep Blue Acridane- and Benzonitrile-Based Emitter Employing Thermally Activated Delayed Fluorescence

Author

Drigo, Nikita A., Kudriashova, Liudmila G., Weissenseel, Sebastian, Sperlich, Andreas, Huckaba, Aron Joel, Nazeeruddin, Mohammad Khaja, and Dyakonov, Vladimir

Subjects
Physics - Applied Physics, Condensed Matter - Materials Science, Physics - Chemical Physics
Abstract

We designed and synthesized a new organic light-emitting diode (OLED) emitter, SBABz4, containing spiro-biacridine donor (D) in the core surrounded by two benzonitrile acceptors (A). The dual A-DxD-A structure is shown to provide pure-blue emission in relation to its single A-D counterpart. Time-resolved photoluminescence (TRPL) recorded in the broad dynamic range from solutions and solid films revealed three emission components: prompt fluorescence, phosphorescence, and efficient thermally-activated delayed fluorescence (TADF). The latter is independently proven by temperature-dependent TRPL and oxygen-quenching PL experiment. From the PL lifetimes and quantum yield, we estimated maximum external quantum efficiency of 7.1% in SBABz4-based OLEDs, and demonstrated 6.8% in a working device., Comment: 19 pages, 5 figures

Published
2021
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8. First-principles and experimental insight of high-entropy materials as electrocatalysts for energy-related applications: Hydrogen evolution, oxygen evolution, and oxygen reduction reactions

Author

Shaikh, Jasmin S., Rittiruam, Meena, Saelee, Tinnakorn, Márquez, Victor, Shaikh, Navajsharif S., Khajondetchairit, Patcharaporn, Pathan, Sumayya, Kanjanaboos, Pongsakorn, Taniike, Toshiaki, Nazeeruddin, Mohammad Khaja, Praserthdam, Piyasan, and Praserthdam, Supareak

Published
2024
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11. Halide Perovskites for Neuromorphic Computing

Author

Vasilopoulou, Maria, primary, Davazoglou, Konstantinos, additional, Mohd Yusoff, Abd Rashid bin, additional, Chai, Yang, additional, Noh, Yong-Young, additional, Anthopoulos, Thomas, additional, and Nazeeruddin, Mohammad Khaja, additional

Published
2023
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13. Co-deposition of hole-selective contact and absorber for improving the processability of perovskite solar cells

Author

Zheng, Xiaopeng, Li, Zhen, Zhang, Yi, Chen, Min, Liu, Tuo, Xiao, Chuanxiao, Gao, Danpeng, Patel, Jay B., Kuciauskas, Darius, Magomedov, Artiom, Scheidt, Rebecca A., Wang, Xiaoming, Harvey, Steven P., Dai, Zhenghong, Zhang, Chunlei, Morales, Daniel, Pruett, Henry, Wieliczka, Brian M., Kirmani, Ahmad R., Padture, Nitin P., Graham, Kenneth R., Yan, Yanfa, Nazeeruddin, Mohammad Khaja, McGehee, Michael D., Zhu, Zonglong, and Luther, Joseph M.

Published
2023
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14. Co-evaporation as an optimal technique towards compact methylammonium bismuth iodide layers

Author

Momblona, Cristina, Kanda, Hiroyuki, Sutanto, Albertus Adrian, Mensi, Mounir, Roldán-Carmona, Cristina, and Nazeeruddin, Mohammad Khaja

Subjects
Physics - Applied Physics, Condensed Matter - Materials Science
Abstract

The most studied perovskite-based solar cells reported up to date contain the toxic lead in its composition. Photovoltaic research and development towards non-toxic, lead-free perovskite solar cells are critical to finding alternatives to reduce human health concerns associated with them. Bismuth-based perovskite variants, especially in the form of methylammonium bismuth iodide (MBI), is a good candidate for the non-toxic light absorber. However, the reported perovskite variant MBI thin flms prepared by the solution process so far suffers from poor morphology and surface coverage. In this work, we investigate for the first time the optoelectronic, crystallographic and morphological properties of MBI thin flms prepared via thermal co-evaporation of MAI and BiI3. We find by modifying the precursor ratio that the layer with pure MBI composition lead to uniform, compact and homogeneous layers, broadening the options of deposition techniques for lead-free based perovskite solar cells.

Published
2020
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19. Getting the Right Twist: Influence of Donor-Acceptor Dihedral Angle on Exciton Kinetics and Singlet-Triplet Gap in Deep Blue Thermally Activated Delayed Fluorescence Emitter

Author

Weissenseel, Sebastian, Drigo, Nikita A., Kudriashova, Liudmila G., Schmid, Markus, Morgenstern, Thomas, Lin, Kun-Han, Prlj, Antonio, Corminboeuf, Clémence, Sperlich, Andreas, Brütting, Wolfgang, Nazeeruddin, Mohammad Khaja, and Dyakonov, Vladimir

Subjects
Physics - Chemical Physics
Abstract

Here, a novel deep blue emitter SBABz4 for use in organic light-emitting diodes (OLED) is investigated. The molecular design of the emitter enables thermally activated delayed fluorescence (TADF), which we examine by temperature-dependent time-resolved electroluminescence (trEL) and photoluminescence (trPL). We show that the dihedral angle between donor and acceptor strongly affects the oscillator strength of the charge transfer state alongside the singlet-triplet gap. The angular dependence of the singlet-triplet gap is calculated by time-dependent density functional theory (TD-DFT). A gap of 15 meV is calculated for the relaxed ground state configuration of SBABz4 with a dihedral angle between the donor and acceptor moieties of 86{\deg}. Surprisingly, an experimentally obtained energy gap of 72+/-5 meV can only be explained by torsion angles in the range of 70{\deg}-75{\deg}. Molecular dynamics (MD) simulations showed that SBABz4 evaporated at high temperature acquires a distribution of torsion angles, which immediately leads to the experimentally obtained energy gap. Moreover, the emitter orientation anisotropy in a host matrix shows an 80% ratio of horizontally oriented dipoles, which is highly desirable for efficient light outcoupling. Understanding intramolecular donor-acceptor geometry in evaporated films is crucial for OLED applications, because it affects oscillator strength and TADF efficiency.

Published
2019
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21. Drastic influence of substituent position on orientation of 2D layers enables efficient and stable 3D/2D perovskite solar cells

Author

Gunes, Ummugulsum, Yaylali, Figen Varlioglu, Gozukara Karabag, Zeynep, Gao, Xiao-Xin, Syzgantseva, Olga A., Karabag, Aliekber, Yildirim, Gulsevim Bensu, Tsoi, Konstantin, Shibayama, Naoyuki, Kanda, Hiroyuki, Rafieh, Alwani Imanah, Zhong, Liping, Züttel, Andreas, Dyson, Paul Joseph, Yerci, Selcuk, Nazeeruddin, Mohammad Khaja, and Gunbas, Gorkem

Published
2023
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28. Photonic nanostructures mimicking floral epidermis for perovskite solar cells

Author

Vasilopoulou, Maria, Jose da Silva, Wilson, Soultati, Anastasia, Kim, Hyeong Pil, Kim, Byung Soon, Reo, Youjin, Ximim Gavim, Anderson Emanuel, Conforto, Julio, Schneider, Fabio Kurt, Felippi, Marciele, Palilis, Leonidas C., Davazoglou, Dimitris, Argitis, Panagiotis, Stergiopoulos, Thomas, Fakharuddin, Azhar, Jang, Jin, Gasparini, Nicola, Nazeeruddin, Mohammad Khaja, Noh, Yong-Young, and Rashid bin Mohd Yusoff, Abd.

Published
2022
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31. Single-crystalline TiO2 nanoparticles for stable and efficient perovskite modules

Author

Ding, Yong, Ding, Bin, Kanda, Hiroyuki, Usiobo, Onovbaramwen Jennifer, Gallet, Thibaut, Yang, Zhenhai, Liu, Yan, Huang, Hao, Sheng, Jiang, Liu, Cheng, Yang, Yi, Queloz, Valentin Ianis Emmanuel, Zhang, Xianfu, Audinot, Jean-Nicolas, Redinger, Alex, Dang, Wei, Mosconic, Edoardo, Luo, Wen, De Angelis, Filippo, Wang, Mingkui, Dörflinger, Patrick, Armer, Melina, Schmid, Valentin, Wang, Rui, Brooks, Keith G., Wu, Jihuai, Dyakonov, Vladimir, Yang, Guanjun, Dai, Songyuan, Dyson, Paul J., and Nazeeruddin, Mohammad Khaja

Published
2022
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33. Investigation of Potential‐Induced Degradation and Recovery in Perovskite Minimodules.

Author

Zhang, Junchuan, Wu, Haodong, Zhang, Yi, Cao, Fangfang, Qiu, Zhiheng, Li, Minghui, Lang, Xiting, Jiang, Yongjie, Gou, Yangyang, Liu, Xirui, Asiri, Abdullah M., Dyson, Paul J., Nazeeruddin, Mohammad Khaja, Ye, Jichun, and Xiao, Chuanxiao

Subjects
RADIANT intensity, CRYSTAL grain boundaries, PEROVSKITE, PHOTOLUMINESCENCE, IONS
Abstract

Potential‐induced degradation (PID) is a prevalent concern in current commercial photovoltaic technologies, impacting their reliability, with the mechanistic basis for PID in perovskite photovoltaic technologies being poorly understood. Here, we investigate the PID mechanism in perovskite minimodules. Our findings reveal nonuniform degradation in the photoluminescence intensity and spectral blue shift. After 60‐h laboratory PID stress tests at −1500 V and 60°C, device efficiency drastically decreases by 96%, and the shunt resistance decreases by 97%, accompanied by a significant quantity of Na+ ions (derived from the soda lime glass) throughout the device structure, leading to a typical PID‐shunting effect. Interestingly, we observed a rapid recovery of device performance during room‐temperature dark storage, in which Na+ ions located close to the glass substrate side rapidly migrated out of the device. Moreover, we also found that the Na+ ions do not appear to diffuse through the grain boundaries but rather their neighboring area and grain interiors, judging by microscopic conductivity mappings. [ABSTRACT FROM AUTHOR]

Published
2024
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35. Quasi‐Planar Core Based Spiro‐Type Hole‐Transporting Material for Dopant‐Free Perovskite Solar Cells.

Author

Shao, Guang, Wang, Dian, Zhou, Zu‐Kun, Yu, Hui‐Juan, Kang, Tao, Zhu, Wei‐Hua, Xiao, Jing, Yu, Zhi‐Lan, Peng, Lifen, Chen, Jian, Ul Ain, Qurat, Chen, Yu, Yang, Hua, Qiu, Zeliang, Hu, Ruiyuan, Khan, Ammar Ahmed, A Alamry, Khalid, Zhang, Yi, Xia, Jianxing, and Nazeeruddin, Mohammad Khaja

Subjects
SOLAR cell efficiency, SOLAR cells, HOLE mobility, MOLECULAR structure, PRODUCTION sharing contracts (Oil & gas)
Abstract

Hole‐transporting material (HTMs) are crucial for obtaining the stability and high efficiency of perovskite solar cells (PSCs). However, the current state‐of‐the‐art n‐i‐p PSCs relied on the use of 2,2′,7,7′‐tetrakis(N,N‐di‐p‐methoxyphenylamine)‐9,9′‐spirobifluorene (spiro‐OMeTAD) exhibit inferior intrinsic and ambient stability due to the p‐dopant and hydrophilic Li‐TFSI additive. In this study, a new spiro‐type HTM with a critical quasi‐planar core (Z‐W‐03) is developed to improve both the thermal and ambient stability of PSCs. The results suggest that the planar carbazole structure effectively passivates the trap states compared to the triphenylamine with a propeller‐like conformation in spiro‐OMeTAD. This passivation effect leads to the shallower trap states when the quasi‐planar HTMs interact with the Pb‐dimer. Consequently, the device using Z‐W‐03 achieves a higher Voc of 1.178 V compared to the spiro‐OMeTAD's 1.155 V, resulting in an enhanced efficiency of 24.02 %. In addition, the double‐column π–π stacking of Z‐W‐03 results in high hole mobility (~10−4 cm2 V−1 s−1) even without p‐dopant. Moreover, when the surface interface is modified, the undoped Z‐W‐03 device can achieve an efficiency of nearly 23 %. Compared to the PSCs using spiro‐OMeTAD, those with Z‐W‐03 exhibit enhanced stability under N2 and ambient conditions. This superior performance is attributed to the quasi‐planar core structure and the presence of multiple CH/π and π–π intermolecular stacking in Z‐W‐03. The multiple CH/π and π–π intermolecular contacts of HTMs can improve the hole hopping transport. Therefore, it is imperative to focus on further molecular structure design and optimization of spiro‐type HTMs incorporating quasi‐planar cores and carbazole moieties for the commercialization of PSCs. [ABSTRACT FROM AUTHOR]

Published
2024
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36. Smart Photovoltaic Windows for Next‐Generation Energy‐Saving Buildings.

Author

Wang, Qian, Na, Zongxu, Yu, Li, Dai, Songyuan, Nazeeruddin, Mohammad Khaja, and Yang, Huai

Subjects
ELECTRIC power, ENERGY harvesting, CLEAN energy, ELECTROCHROMIC windows, SOLAR energy
Abstract

The global energy system transforming from fossil fuels to renewable green energy through the adaption of innovative and dynamic green technologies. Energy‐saving buildings (ESBs) are attracting extensive attention as intelligent architectures capable of significantly reducing the energy consumption for heating, air‐conditioning, and lighting. They provide comfortable working and living environment by regulating and harnessing solar energy. Smart photovoltaic windows (SPWs) offer a promising platform for designing ESBs due to their unique feature. They can modulate solar energy based on dynamic color switching behavior under external stimuli and generate electrical power by harvesting solar energy. In this review, the‐state‐of‐art of strategies and technologies are summarized putting SPWs toward high‐efficiency ESBs. The SPWs are systematically categorized according to the working principle and functional component. For each type of SPWs, material and architecture engineering are focused on to optimize operation mode, optical modulation capability, photovoltaic performance and durability for giving ESBs flexible manipulation, extraordinary energy‐saving effect, and high electricity power. In addition, the challenges and opportunities in this cutting‐edge research area are discussed, with the aim of promoting the development of advanced multifunctional SPWs and their application in high efficiency ESBs. [ABSTRACT FROM AUTHOR]

Published
2024
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37. Enhancing Efficiency of Industrially‐Compatible Monolithic Perovskite/Silicon Tandem Solar Cells with Dually‐Mixed Self‐Assembled Monolayers.

Author

Li, Chi, Li, Yuheng, Chen, Yong, Zhang, Huifeng, Zhang, Shan‐Ting, Zhang, Zilong, Lin, Fulin, Liang, Lusheng, Gong, Lijie, Hao, Hongwei, Wang, Jilei, Bao, Shaojuan, Yang, Ye, Nazeeruddin, Mohammad Khaja, Li, Dongdong, and Gao, Peng

Subjects
SILICON solar cells, SILICON wafers, PHOSPHONIC acids, SUBSTRATES (Materials science), METALLIC oxides
Abstract

The antisolvent‐assisted spin‐coating still lags behind the thermal evaporation method in fabricating perovskite films atop industrially textured silicon wafers in making monolithic perovskite/silicon solar cells (P/S‐TSCs). The inhomogeneity of hole‐selective self‐assembled monolayers (SAMs) often arises from the insufficient bonding between hygroscopic phosphonic acid anchors and metal oxide. To address this, a mixed‐SAM strategy (Mx‐SAM) is proposed to enhance the adsorption energy of SAMs on the ITO surface, facilitate the formation of dense and humidity‐resistant hole‐selective layer (HSL) on substrates, and improve hole transport capabilities. With the aid of the Mx‐SAM strategy, the optimized wide‐bandgap PSCs achieved an impressive power conversion efficiency (PCE) of 22.63% with an exceptionally high fill factor (FF) of 86.67% using the 1.68 eV perovskite. Moreover, they exhibited enhanced stability under damp‐heat conditions (ISOS‐D‐3, 85% RH, 85 °C) with a T90 of 900 h for encapsulated PSCs, representing one of the best performances for wide‐bandgap PSCs. When further extending the Mx‐SAM strategy to making P/S‐TSCs using silicon wafers from industry, a remarkable efficiency of 28.07% is reached while upholding outstanding reproducibility. This strategy holds significant promise for the feasibility of fabricating industrially‐compatible P/S‐TSCs. [ABSTRACT FROM AUTHOR]

Published
2024
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39. Perovskite Solar Cells: Challenges Facing Polymeric Hole Selective Materials in p–i–n Configuration.

Author

Ganesan, Paramaguru, Nazeeruddin, Mohammad Khaja, and Gao, Peng

Subjects
*STRAINS & stresses (Mechanics), *ENERGY levels (Quantum mechanics), *SOLAR cells, *STRUCTURAL design, *SURFACE defects
Abstract

Polymeric hole‐selective materials (P‐HSMs) offer advantages like solution processability, tunable energy levels, and improved mechanical stability, making them suitable for large‐scale and flexible substrates. Poly[bis(4‐phenyl) (2,4,6‐trimethylphenyl) amine] (PTAA) based p–i–n perovskite solar cells exhibit promising power conversion efficiency (PCE), but wettability, dopant, and cost challenges necessitate the development of advanced next‐generation P‐HSMs. To provide a clear understanding of the structural property with photovoltaic performance, this review classifies such newly developed P‐HSMs into five distinct structural categories. Specifically, this review discusses the current status, advancements, challenges, and prospects in structural design and synthetic variations, focusing on enhancing photovoltaic performance, wettability, mitigating surface defects, and stability. Notably, incorporating polar units into P‐HSMs enhances wettability and mitigates ion instabilities and uncoordinated lead defects. Promising structural designs like polymeric self‐assembled monolayers and in situ polymerized hole‐selective materials are examined. Despite performance advancements, emerging, P‐HSMs face significant challenges such as limited thermal stress analysis (55–85 °C) and scalability restricted to small‐scale devices. To bridge this gap, this review emphasizes the urgent need for prioritizing thermal stability testing and large‐scale device fabrication in future research, paving the way for commercial viability of P‐HSMs in p–i–n perovskite photovoltaics. [ABSTRACT FROM AUTHOR]

Published
2024
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41. 3D Conjugated Hole Transporting Materials for Efficient and Stable Perovskite Solar Cells and Modules

Author

Zhang, Xianfu, primary, Liu, Xuepeng, additional, Ding, Yunxuan, additional, Ding, Bin, additional, Shi, Pengju, additional, Syzgantseva, Olga A., additional, Syzgantseva, Maria A., additional, Fei, Zhaofu, additional, Chen, Jianlin, additional, Rahim, Ghadari, additional, Han, Mingyuan, additional, Zhang, Kai, additional, Zhou, Ying, additional, Brooks, Keith G., additional, Wang, Rui, additional, Sun, Licheng, additional, Dyson, Paul J., additional, Dai, Songyuan, additional, Nazeeruddin, Mohammad Khaja, additional, and Ding, Yong, additional

Published
2024
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44. Ultra-stable 2D/3D hybrid perovskite photovoltaic module

Author

Grancini, Giulia, Roldán-Carmona, Cristina, Zimmermann, Iwan, Martineau, David, Narbey, Stéphanie, Oswald, Frédéric, and Nazeeruddin, Mohammad Khaja

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science
Abstract

Hybrid perovskite solar cells, with their power conversion efficiency (PCE) exceeding 22%, have been representing a revolutionary concept for future energy power generation. Although listed among the Top 10 Emerging Technologies of 2016, device longevity is the actual bottleneck for their real uptake in the market. Here we design an ultra-stable molecular junction of two/three dimensional (2D/3D) perovskites. It consists of a 2D (HOOC(CH2)2NH3)2PbI4, anchored at the oxide substrate, that templates the growth of a highly ordered 3D CH3NH3PbI3 perovskite stabilizing in the orthorhombic phase, even at room temperature. The unique and exceptional 2D/3D structure yields 14.6% PCE in solar cells with Spiro-OMeTAD and Au, and 12.9% PCE in hole-conductor free architecture. Aiming at the up-scaling of this technology, we realize 10x10 cm2 large-area photovoltaic modules by a low-cost, fully printable, industrial-scale process delivering 11.2% PCE. We demonstrate a record stability in the PCE of 5,000 hours, setting the direction for the new generation of carbon free energy., Comment: 13 pages, 4 figures

Published
2016

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