National Renewable Energy Laboratory (NREL), Golden, CO (United States). Chemistry and Nanoscience Center
University of Toledo, OH (United States)
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
National Renewable Energy Laboratory (NREL), Golden, CO (United States). Chemistry and Nanoscience Center; University of Colorado, Boulder, CO (United States)
National Renewable Energy Laboratory (NREL), Golden, CO (United States); University of Colorado, Boulder, CO (United States)
The development of highly stable and efficient wide-bandgap (WBG) perovskite solar cells (PSCs) based on bromine-iodine (Br–I) mixed-halide perovskite (with Br greater than 20%) is critical to create tandem solar cells. However, issues with Br–I phase segregation under solar cell operational conditions (such as light and heat) limit the device voltage and operational stability. This challenge is often exacerbated by the ready defect formation associated with the rapid crystallization of Br-rich perovskite chemistry with antisolvent processes. We combined the rapid Br crystallization with a gentle gas-quench method to prepare highly textured columnar 1.75–electron volt Br–I mixed WBG perovskite films with reduced defect density. Here, with this approach, we obtained 1.75–electron volt WBG PSCs with greater than 20% power conversion efficiency, approximately 1.33-volt open-circuit voltage (Voc), and excellent operational stability (less than 5% degradation over 1100 hours of operation under 1.2 sun at 65°C). When further integrated with 1.25–electron volt narrow-bandgap PSC, we obtained a 27.1% efficient, all-perovskite, two-terminal tandem device with a high Voc of 2.2 volts.
@article{osti_1907621,
author = {Jiang, Qi and Tong, Jinhui and Scheidt, Rebecca A. and Wang, Xiaoming and Louks, Amy E. and Xian, Yeming and Tirawat, Robert and Palmstrom, Axel F. and Hautzinger, Matthew P. and Harvey, Steven P. and others},
title = {Compositional texture engineering for highly stable wide-bandgap perovskite solar cells},
annote = {The development of highly stable and efficient wide-bandgap (WBG) perovskite solar cells (PSCs) based on bromine-iodine (Br–I) mixed-halide perovskite (with Br greater than 20%) is critical to create tandem solar cells. However, issues with Br–I phase segregation under solar cell operational conditions (such as light and heat) limit the device voltage and operational stability. This challenge is often exacerbated by the ready defect formation associated with the rapid crystallization of Br-rich perovskite chemistry with antisolvent processes. We combined the rapid Br crystallization with a gentle gas-quench method to prepare highly textured columnar 1.75–electron volt Br–I mixed WBG perovskite films with reduced defect density. Here, with this approach, we obtained 1.75–electron volt WBG PSCs with greater than 20% power conversion efficiency, approximately 1.33-volt open-circuit voltage (Voc), and excellent operational stability (less than 5% degradation over 1100 hours of operation under 1.2 sun at 65°C). When further integrated with 1.25–electron volt narrow-bandgap PSC, we obtained a 27.1% efficient, all-perovskite, two-terminal tandem device with a high Voc of 2.2 volts.},
doi = {10.1126/science.adf0194},
url = {https://www.osti.gov/biblio/1907621},
journal = {Science},
issn = {ISSN 0036-8075},
number = {6626},
volume = {378},
place = {United States},
publisher = {AAAS},
year = {2022},
month = {12}}
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES)