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12 results on '"Morales‐Vilches, Anna B."'

2. 27.9% Efficient Monolithic Perovskite/Silicon Tandem Solar Cells on Industry Compatible Bottom Cells

Author

Köhnen, Eike, Wagner, Philipp, Lang, Felix, Cruz, Alexandros, Li, Bor, Roß, Marcel, Jošt, Marko, Morales-Vilches, Anna B., Topič, Marko, Stolterfoht, Martin, Neher, Dieter, Korte, Lars, Rech, Bernd, Schlatmann, Rutger, Stannowski, Bernd, and Albrecht, Steve

Subjects
ddc:600
Abstract

Monolithic perovskite/silicon tandem solar cells recently surpass the efficiency of silicon single‐junction solar cells. Most tandem cells utilize >250 μm thick, planarized float‐zone (FZ) silicon, which is not compatible with commercial production using

Published
2021

3. 27.9% Efficient Monolithic Perovskite/Silicon Tandem Solar Cells on Industry Compatible Bottom Cells

Author

Köhnen, Eike, primary, Wagner, Philipp, additional, Lang, Felix, additional, Cruz, Alexandros, additional, Li, Bor, additional, Roß, Marcel, additional, Jošt, Marko, additional, Morales-Vilches, Anna B., additional, Topič, Marko, additional, Stolterfoht, Martin, additional, Neher, Dieter, additional, Korte, Lars, additional, Rech, Bernd, additional, Schlatmann, Rutger, additional, Stannowski, Bernd, additional, and Albrecht, Steve, additional

Published
2021
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4. A piperidinium salt stabilizes efficient metal-halide perovskite solar cells

Author

Lin, Yen-Hung, primary, Sakai, Nobuya, additional, Da, Peimei, additional, Wu, Jiaying, additional, Sansom, Harry C., additional, Ramadan, Alexandra J., additional, Mahesh, Suhas, additional, Liu, Junliang, additional, Oliver, Robert D. J., additional, Lim, Jongchul, additional, Aspitarte, Lee, additional, Sharma, Kshama, additional, Madhu, P. K., additional, Morales‐Vilches, Anna B., additional, Nayak, Pabitra K., additional, Bai, Sai, additional, Gao, Feng, additional, Grovenor, Chris R. M., additional, Johnston, Michael B., additional, Labram, John G., additional, Durrant, James R., additional, Ball, James M., additional, Wenger, Bernard, additional, Stannowski, Bernd, additional, and Snaith, Henry J., additional

Published
2020
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6. A Simple Method with Analytical Model to Extract Heterojunction Solar Cell Series Resistance Components and to Extract the A-Si:H(i/p) to Transparent Conductive Oxide Contact Resistivity.

Author

Wang, Er-Chien, Morales-Vilches, Anna B., Neubert, Sebastian, Cruz, Alexandros, Schlatmann, Rutger, and Stannowski, Bernd

Subjects
*SILICON solar cells, *SOLAR cells, *OPEN-circuit voltage, *HETEROJUNCTIONS, *LEAN management, *SOLAR technology
Abstract

Silicon heterojunction (SHJ) solar cell technology has the potential to be the next mainstream industrial solar cell design due to its high efficiency and lean production process with only four main process steps. While two-side contacted SHJ cells have very high open circuit voltages (Voc) >740 mV, they tend to be lower in short circuit current density (Jsc) and fill factor (FF). Understanding the series resistance (Rs) components of such cells is crucial as these cells have two extra TCO/a-Si/Si contact resistances due to the optically absorptive passivating electrodes. Reducing the Rs components contribution is essential to improve the FF. In this paper, we report a straightforward and simple analytical model to break down the Rs of our SHJ solar cell having >23% efficiency into its components with the aid from common characterization methods, namely transfer length method (TLM) and Cox and Strack method. We derived the silicon bulk to transparent conductive oxide (TCO) contact resistivity through the amorphous-silicon (a-Si:H) intrinsic/p-doped stacks, a parameter that is not measureable directly, from experimental SHJ solar cell results, using front-junction, rear-junction and front finger number variation setups. We found it to be 0.30 ± 0.07 Ωcm². Further reducing this value is one of the keys to improve SHJ solar cell’s FF. [ABSTRACT FROM AUTHOR]

Published
2019
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8. Infrared Light Management Using a Nanocrystalline Silicon Oxide Interlayer in Monolithic Perovskite/Silicon Heterojunction Tandem Solar Cells with Efficiency above 25%

Author

Mazzarella, Luana, primary, Lin, Yen‐Hung, additional, Kirner, Simon, additional, Morales‐Vilches, Anna B., additional, Korte, Lars, additional, Albrecht, Steve, additional, Crossland, Ed, additional, Stannowski, Bernd, additional, Case, Chris, additional, Snaith, Henry J., additional, and Schlatmann, Rutger, additional

Published
2019
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10. Nanocrystalline silicon oxide interlayer in monolithic perovskite/silicon heterojunction tandem solar cells with total current density >39 mA/cm2

Author

Stannowski, Bernd, primary, Mazzarella, Luana, additional, Lin, Yen-Hung, additional, Kirner, Simon, additional, Morales-Vilches, Anna B., additional, Korte, Lars, additional, Albrecht, Steve, additional, Crossland, Ed, additional, Case, Chris, additional, Snaith, Henry, additional, and Schlatmann, Rutger, additional

Published
2018
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11. ITO-Free Silicon Heterojunction Solar Cells With ZnO:Al/SiO2 Front Electrodes Reaching a Conversion Efficiency of 23%

Author

Morales-Vilches, Anna B., Cruz, Alexandros, Pingel, Sebastian, Neubert, Sebastian, Mazzarella, Luana, Meza, Daniel, Korte, Lars, Schlatmann, Rutger, and Stannowski, Bernd

Abstract

Silicon heterojunction (SHJ) solar cells have been increasingly attracting attention to the photovoltaic community in the last years due to their high efficiency potential and the lean production process. We report on the development of a stable baseline process for SHJ cells with focus on the optical improvement of the solar cells’ front side. An amorphous silicon oxide layer (a-SiO2) was used as an antireflective coating (AR) on the front side the finished SHJ devices. Both optical simulations and experimental results demonstrate a short-circuit current density (Jsc) improvement of 0.4 mA/cm2 when applying the a-SiO2 AR, yielding maximum conversion efficiencies of 23.0%. Full-size cells with 244 cm2 total area have been produced using three front contact stacks: indium tin oxide (ITO) as reference, ZnO:Al, and ZnO:Al/SiO2 showing the Jsc improvement with the double AR configuration. Damp-heat tests on those samples demonstrate an enhanced stability of cells with ZnO:Al front TCO when capped with SiO2.

Published
2019
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12. Versatility of Nanocrystalline Silicon Films: from Thin-Film to Perovskite/c-Si Tandem Solar Cell Applications.

Author

Mazzarella, Luana, Morales-Vilches, Anna B., Korte, Lars, Schlatmann, Rutger, and Stannowski, Bernd

Subjects
SILICON solar cells, SOLAR cells, SILICON films, PEROVSKITE, SOLAR cell design, PLASMA-enhanced chemical vapor deposition, SILICON oxide
Abstract

Doped hydrogenated nanocrystalline (nc-Si:H) and silicon oxide (nc-SiOx:H) materials grown by plasma-enhanced chemical vapor deposition have favourable optoelectronic properties originated from their two-phase structure. This unique combination of qualities, initially, led to the development of thin-film Si solar cells allowing the fabrication of multijunction devices by tailoring the material bandgap. Furthermore, nanocrystalline silicon films can offer a better carrier transport and field-effect passivation than amorphous Si layers could do, and this can improve the carrier selectivity in silicon heterojunction (SHJ) solar cells. The reduced parasitic absorption, due to the lower absorption coefficient of nc-SiOx:H films in the relevant spectral range, leads to potential gain in short circuit current. In this work, we report on development and applications of hydrogenated nanocrystalline silicon oxide (nc-SiOx:H) from material to device level. We address the potential benefits and the challenges for a successful integration in SHJ solar cells. Finally, we prove that nc-SiOx:H demonstrated clear advantages for maximizing the infrared response of c-Si bottom cells in combination with perovskite top cells. [ABSTRACT FROM AUTHOR]

Published
2020
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