1. Toward Stable Monolithic Perovskite/Silicon Tandem Photovoltaics: A Six-Month Outdoor Performance Study in a Hot and Humid Climate
- Author
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Michael Salvador, Esma Ugur, Alessandro J. Mirabelli, Michele De Bastiani, Furkan Halis Isikgor, George T. Harrison, Bin Chen, Yi Hou, Thomas Allen, Shynggys Zhumagali, Maxime Babics, Edward H. Sargent, Erkan Aydin, Stefaan De Wolf, Jiang Liu, Atteq ur Rehman, Semen Shikin, Emmanuel Van Kerschaver, Quentin Jeangros, and Christophe Ballif
- Subjects
Engineering ,design ,Energy Engineering and Power Technology ,Library science ,induced degradation ,02 engineering and technology ,migration ,010402 general chemistry ,01 natural sciences ,7. Clean energy ,Materials Chemistry ,Naval research ,Renewable Energy, Sustainability and the Environment ,business.industry ,stability ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Navy ,solar-cells ,Fuel Technology ,Chemistry (miscellaneous) ,heat ,light ,0210 nano-technology ,business ,Hot and humid - Abstract
Perovskite/silicon tandem solar cells are emerging as a high-efficiency and prospectively cost-effective solar technology with great promise for deployment at the utility scale. However, despite the remarkable performance progress reported lately, assuring sufficient device stability-particularly of the perovskite top cell-remains a challenge on the path to practical impact. In this work, we analyze the outdoor performance of encapsulated bifacial perovskite/silicon tandems, by carrying out field-testing in Saudi Arabia. Over a six month experiment, we find that the open circuit voltage retains its initial value, whereas the fill factor degrades, which is found to have two causes. A first degradation mechanism is linked with ion migration in the perovskite and is largely reversible overnight, though it does induce hysteretic behavior over time. A second, irreversible, mechanism is caused by corrosion of the silver metal top contact with the formation of silver iodide. These findings provide directions for the design of new and more stable perovskite/silicon tandems
- Published
- 2021