1. Study of bias-induced degradation mechanism in perovskite CH3NH3PbI3-xClx solar cells by electroluminescence spectroscopy.
- Author
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Gupta, Deeksha, Veerender, P., Sridevi, C., Koiry, S. P., Jha, P., and Chauhan, A. K.
- Subjects
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SOLAR cells , *PEROVSKITE , *ELECTROLUMINESCENCE , *OPEN-circuit voltage , *PHOTOVOLTAIC power systems , *SPECTROMETRY , *LUMINESCENCE - Abstract
We investigate the electrical bias-induced degradation mechanism in non-encapsulated mixed halide perovskite CH3NH3PbI3-xClx solar cells in ambient conditions using spatial and time-resolved electroluminescence (EL) measurements. The analyses of spatially resolved EL images reveal the inhomogeneous distribution of luminescence efficiency of the perovskite layer. A significant decrease of ~ 33% in power conversion efficiency (PCE) from 12.15 to 8.15% is found after applying a bias voltage larger than the open-circuit voltage (Voc) for ~ 60 min in the ambient environment. Our findings show that the combined effects of cation defects (MA+/VMA+) migration and decomposition of the perovskite layer are primarily responsible for degrading EL intensity and the photovoltaic properties. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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