High Performance and Efficiency Recovery in Sn‐Based Flexible Perovskite Solar Cells by Antioxidant Vanillin and Microwave Treatment

Author:

Balilonda Andrew12,Du Mengyu1,Li Ziqi2,Li Wenbo2,Mei Wen2,Leung Man Yui2,Wu Guan1,Tao Xiaoming2ORCID,Chen Wei1ORCID

Affiliation:

1. National Engineering Lab for Textile Fiber Materials and Processing Technology School of Materials Science and Engineering Zhejiang Sci-Tech University Hangzhou 310018 P. R. China

2. Research Institute for Intelligent Wearable Systems The Hong Kong Polytechnic University Hung Hom, Kowloon Hong Kong 999077 P. R. China

Abstract

AbstractPerovskite based on Sn have attracted extensive attention  to address the toxicity challenge associated with Pb‐based perovskite solar cells. However, Sn‐based perovskite solar cells(SPSCs)are notable for their poor stability and loss of efficiency due to rapid oxidation of Sn2+ to Sn4+ in air. To slow down the rapid oxidation, a number of antioxidants are suggested. Nevertheless, the antioxidant normally gets oxidized to non‐antioxidizing by‐products in a single‐stage redox reaction and loses the function of oxidation prevention. Herein, vanillin is introduced, a natural antioxidant with a double‐staged redox reaction to inhibit the oxidation of Sn2+ or reduce Sn4+ back to Sn2+, which improves the efficiency and prolongs the open‐air stability of SPSCs. With 7.5% vanillin doping, an outstanding efficiency of 13.18% is achieved. Moreover, exposure of the solar cell to 160 W microwave irradiation for 3 minutes resulted in significant efficiency recovery from 88% to 96.5% at 812 hours and from 35.7% to 65.4% after 2200 hours of aging. This work reveals the potential of natural antioxidation and short microwave irradiation as suitable approaches to elevate the efficiency and lifetime of SPSCs.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Research Grants Council, University Grants Committee

Publisher

Wiley

Subject

Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials

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