Proceedings of Online International Conference on Hybrid and Organic Photovoltaics (OnlineHOPV20)
Publication date: 22nd May 2020
Rapid increase in power conversion efficiency has put perovskite solar cells on the PV map. Long-term stability in rooftop field testing, however, remains a challenge. In this contribution, we expose perovskite solar cells to real-world conditions and track their performance in MPP operation. The performance is correlated to solar irradiance and air temperature. From those data it is hard to estimate how well the cells are performing. Therefore, we turn to controlled laboratory conditions and extract PV parameters under different irradiance (from 10 to 120 mW cm-2) and temperature (from 25 to 85 °C). Linear dependence on temperature is obtained with a power temperature coefficient of -0.17%/K. Integrating the temperature coefficient into our optical model we develop a temperature-dependent energy yield model. Comparison between measured data on the rooftop and modeled data show excellent matching for the first few days, validating the model. The difference grows with time of testing, which is attributed to the device degradation. The temperature-dependent energy yield can therefore be used to predict generated energy or monitor the degradation of devices.
-Accepted for publication in Advanced Energy Materials
-Artiom Magomedov from Kaunas University of Technology and Amran Al-Ashouri (HZB) for developing and optimizing MeO-2PACz HTL
-Kristijan Brecl and Gašper Matič for help with rooftop testing
-BMBF: grant no. 03SF0540
-Slovene Research Agency (ARRS): program P2-0197 and J2-1727
-Helmholtz association: project TAPAS
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