Issue

Vol. 12 (2020)

Perfection of Perovskite Grain Boundary Passivation by Rhodium Incorporation for Efficient and Stable Solar Cells

https://doi.org/10.1007/s40820-020-00457-7
Wei Liu
Institute of Advanced Materials and New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210023, People’s Republic of China
Nanjing Liu
Institute of Advanced Materials and New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210023, People’s Republic of China
Shilei Ji
Institute of Advanced Materials and New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210023, People’s Republic of China
Hongfeng Hua
Institute of Advanced Materials and New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210023, People’s Republic of China
Yuhui Ma
Institute of Advanced Materials and New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210023, People’s Republic of China
Ruiyuan Hu
Institute of Advanced Materials and New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210023, People’s Republic of China
Jian Zhang
Institute of Advanced Materials and New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210023, People’s Republic of China
Liang Chu
Institute of Advanced Materials and New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210023, People’s Republic of China
Xing’ao Li
Institute of Advanced Materials and New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210023, People’s Republic of China
Wei Huang
Institute of Advanced Materials and New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210023, People’s Republic of China

Corresponding Author: Wei Huang

iamwhuang@njupt.edu.cn

Nano-Micro Letters, Vol. 12 (2020), Article Number: 119

Abstract

Organic cation and halide anion defects are omnipresent in the perovskite films, which will destroy perovskite electronic structure and downgrade the properties of devices. Defect passivation in halide perovskites is crucial to the application of solar cells. Herein, tiny amounts of trivalent rhodium ion incorporation can help the nucleation of perovskite grain and passivate the defects in the grain boundaries, which can improve efficiency and stability of perovskite solar cells. Through first-principle calculations, rhodium ion incorporation into the perovskite structure can induce ordered arrangement and tune bandgap. In experiment, rhodium ion incorporation with perovskite can contribute to preparing larger crystalline and uniform film, reducing trap-state density and enlarging charge carrier lifetime. After optimizing the content of 1% rhodium, the devices achieved an efficiency up to 20.71% without obvious hysteresis, from 19.09% of that pristine perovskite. In addition, the unencapsulated solar cells maintain 92% of its initial efficiency after 500 h in dry air. This work highlights the advantages of trivalent rhodium ion incorporation in the characteristics of perovskite solar cells, which will promote the future industrial application.


Highlights:


1 Rhodium ion incorporation helps the nucleation of perovskite grain, passivates the defects in the grain boundaries and enhances the film quality, charge carrier lifetime and mobility.
2 After optimizing 1% rhodium into perovskite film, the solar cells achieve an efficiency of 20.71% without obvious hysteresis.

Keywords

Perovskite solar cells Grain boundary passivation Rhodium incorporation
Liu, Wei, Nanjing Liu, Shilei Ji, Hongfeng Hua, Yuhui Ma, Ruiyuan Hu, Jian Zhang, Liang Chu, Xing’ao Li, and Wei Huang. 2020. “Perfection of Perovskite Grain Boundary Passivation by Rhodium Incorporation for Efficient and Stable Solar Cells”. Nano-Micro Letters 12 (June):119. https://doi.org/10.1007/s40820-020-00457-7.
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