Song WANG, You-zheng HOU, Fan ZHANG, et al. Effect of Passivation Layer on Trap Assisted Recombination in Inverted Perovskite Solar Cells. [J]. Chinese Journal of Luminescence 42(7):1029-1039(2021)
DOI:
Song WANG, You-zheng HOU, Fan ZHANG, et al. Effect of Passivation Layer on Trap Assisted Recombination in Inverted Perovskite Solar Cells. [J]. Chinese Journal of Luminescence 42(7):1029-1039(2021) DOI: 10.37188/CJL.20210103.
Effect of Passivation Layer on Trap Assisted Recombination in Inverted Perovskite Solar Cells增强出版
Organic-inorganic lead halide perovskite polycrystalline thin film solar cells have achieved rapid growth in photoelectric conversion efficiency in recent years of research. However
the active layer of its polycrystalline structure causes the device to still suffer performance degradation caused by defects in the surface and grain boundary positions. In this study
two organic salts
namely
phenethylammonium iodide(PEAI) and 2-fluorophenylethylammonium iodide(o-F-PEAI)
were used to form a passivation layer on the surface of perovskite film. Scanning electron microscopy(SEM) and atomic force microscopy(AFM) analysis results show that the grain boundaries of the perovskite film treated with PEAI and o-F-PEAI are obviously filled with passivation layer
and the surface roughness is also significantly reduced. In addition
the fluorescence lifetime imaging(FLIM) analysis results show that the passivated perovskite film has more photons and longer fluorescence lifetime. The above results indicate that the passivation layer induced by PEAI and o-F-PEAI can effectively inhibit the composite behavior of defects on the surface and grain boundary of the polycrystalline film. Therefore
the power conversion efficiency(PCE) of the inverted structure perovskite solar cell device after passivation can reach 21%. In addition
the devices after o-F-PEAI passivation show better device stability due to the effect of fluoride ions.
关键词
荧光寿命显微成像倒置钙钛矿太阳能电池表面钝化PEAIo-F-PEAI
Keywords
fluorescence-lifetime imaging microscopyinverted perovskite solar cellsurface passivationPEAIo-F-PEAI
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