钙钛矿太阳能电池中钝化层对缺陷复合行为的影响

王松; 侯有政; 张帆; 叶帅; 宋军

doi:10.37188/CJL.20210103

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钙钛矿太阳能电池中钝化层对缺陷复合行为的影响

器件制备及器件物理 | 更新时间：2021-07-22

- 钙钛矿太阳能电池中钝化层对缺陷复合行为的影响
  增强出版
- Effect of Passivation Layer on Trap Assisted Recombination in Inverted Perovskite Solar Cells
- 发光学报 2021年42卷第7期页码：1029-1039
- 作者机构：
  
  深圳大学物理与光电工程学院　光电器件与系统重点实验室，广东　深圳　 518000
- 作者简介：
  
  [ "王松(1992-)，男，江西宜春人，硕士研究生，2016年于南昌航空大学获得学士学位，主要从事钙钛矿太阳能电池的研究。E-mail: 417810363@qq.com" ]
  [ "张帆(1990-)，男，山西侯马人，博士，副研究员，2017年于太原理工大学获得博士学位，主要从事高性能钙钛矿太阳能电池的研究。E-mail: fanzhang@szu.edu.cn" ]
- 基金信息：
  
  国家自然科学基金(61804099)
- DOI：10.37188/CJL.20210103
  中图分类号： TM914.4
- 纸质出版日期：2021-07-01，
  
  收稿日期：2021-03-23，
  
  修回日期：2021-04-15，
- 稿件说明：
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王松, 侯有政, 张帆, 等. 钙钛矿太阳能电池中钝化层对缺陷复合行为的影响[J]. 发光学报, 2021,42(7):1029-1039.

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, 2021, 42(7): 1029-1039.
王松, 侯有政, 张帆, 等. 钙钛矿太阳能电池中钝化层对缺陷复合行为的影响[J]. 发光学报, 2021,42(7):1029-1039. DOI： 10.37188/CJL.20210103.

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, 2021, 42(7): 1029-1039. DOI： 10.37188/CJL.20210103.

摘要

有机-无机卤化铅钙钛矿多晶薄膜太阳能电池在近几年的研究中实现了光电转换效率的快速增长。然而，其多晶结构的活性层导致器件仍然遭受到表面和晶界位置缺陷引起的性能衰减。本研究借助两种有机氢碘酸盐，即苯乙基碘化胺(Phenethylammonium iodide

PEAI)和邻氟苯乙胺碘(2-Fluorophenylethylammonium iodide

o-F-PEAI)，在CH

PbI

钙钛矿多晶薄膜表面形成钝化层。扫描电子显微镜和原子力显微镜分析结果显示，PEAI和o-F-PEAI处理后的钙钛矿薄膜晶界被钝化层明显填充，表面粗糙度也显著下降。另外，荧光寿命成像分析结果显示钝化后的钙钛矿薄膜具有更多的光子数和更长的荧光寿命。上述结果表明，PEAI和o-F-PEAI诱导的钝化层可以有效抑制多晶薄膜表面和晶界位置的缺陷复合行为。因此，钝化后的倒置结构钙钛矿太阳能电池器件功率转换效率(Power conversion efficiency

PCE)可以达到21%。此外，o-F-PEAI钝化处理后的器件由于氟离子的作用表现出更好的器件稳定性。

Abstract

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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