Impact of the Current on Reverse Bias Degradation of Perovskite Solar Cells
Jonathan Henzel (TNO, TU Delft - Photovoltaic Materials and Devices)
Klaas Bakker (TNO)
Mehrdad Najafi (TNO)
Valerio Zardetto (TNO)
Sjoerd Veenstra (TNO)
O Isabella (TU Delft - Photovoltaic Materials and Devices)
L. Mazzarella (TU Delft - Photovoltaic Materials and Devices)
A.W. Weeber (TNO, TU Delft - Photovoltaic Materials and Devices)
Mirjam Theelen (TNO)
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Abstract
Nonequal current generation in the cells of a photovoltaic module, e.g., due to partial shading, leads to operation in reverse bias. This quickly causes a significant efficiency loss in perovskite solar cells. We report a more quantitative investigation of the reverse bias degradation. Various small reverse biases (negative voltages) were applied for different durations. After normalizing the applied voltages with the breakdown voltages, we found similar dependences of the reverse bias current and the degradation rate. We draw conclusions regarding possible degradation mechanisms and propose a way to increase the comparability of degradation rates for comparing different perovskite solar cells.
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