Alleviating hysteresis and improving device stability of perovskite solar cells via alternate voltage sweeps |
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| Affiliation: | 1. Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Institute of Opto-electronic Materials and Technology, South China Normal University, Guangzhou 510631, China;2. Guangdong Engineering Research Center of Optoelectronic Functional Materials and Devices, Institute of Opto-electronic Materials and Technology, Guangzhou 510631, China |
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| Abstract: | The anomalous hysteresis in a perovskite solar cell induced by an asymmetric field is confirmed by a capacitance-voltage measurement. By applying several cycles of alternating reverse and forward scans, this hysteresis phenomenon is obviously alleviated, resulting in a hysteresis-less state in the perovskite solar cell. Meanwhile, the open-circuit voltage and power conversion efficiency of the perovskite solar cell are enhanced by 55.74% and 61.30%, respectively, while the current density and fill factor keep almost invariable. The operation of alleviating hysteresis is essential for further research and is likely to bring in performance gains. |
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| Keywords: | perovskite solar cells hysteresis behavior alternate voltage sweeps built-in electric field |
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