Natural passivation of the perovskite layer by oxygen in ambient air to improve the efficiency and stability of perovskite solar cells simultaneously |
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| Affiliation: | Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), P.O.Box:15875-4413, Tehran, Iran;Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Engineering Research Center of Green Functional Materials, Institute of Materials Physical Chemistry, Huaqiao University, Xiamen 361021, China;State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | For the hybrid organic-inorganic halide perovskite (HHPs) material, oxygen passivation could enhance the photoluminescence intensity, while it also deteriorates the stability of HHPs film or device. It is a challenge how to use oxygen passivation to improve the efficiency and stability of the HHPs solar cells simultaneously. Here we reported a novel and simple method for natural passivation of the perovskite layer with oxygen in ambient air by exclusion of light illumination. The HHPs solar cells were fabricated by deposition of hole transport layer after oxygen passivation. By optimizing the passivation conditions, the power conversion efficiency of the solar cells increases to 20.1% from 17.3% for those without passivation. Meanwhile, the stability of the HHPs solar cells with passivation was improved. This work is the first report applying oxygen passivation to improve the efficiency and stability of HHPs solar cells simultaneously. |
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| Keywords: | Perovskite solar cells Oxygen passivation Efficiency Stability |
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