物理学进展

物理学进展 ›› 2022, Vol. 42 ›› Issue (2): 54-60.doi: 10.13725/j.cnki.pip.2022.02.002

所属专题： 2022年, 第42卷

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二维钙钛矿太阳能电池光电流成像研究

  

  1. 1. 辽宁师范大学，物理与电子技术学院，辽宁大连116029; 2. 中国科学院大连化学物理研究所，分子反应动力学国家重点实验室, 大连116023;3. 中国科学院大连化学物理研究所，分子反应动力学国家重点实验室, 辽宁大连116023
  • 出版日期:2022-04-20 发布日期:2022-04-25
  • 基金资助:
    国家自然科学基金（No. 22073099，No.U2001216，No.21725305）、辽宁省科学研究项目（No.LF2020003）、大连市青年科技之星（No. 2019RQ0105）

Photocurrent Mapping of Two-Dimensional Perovskite Solar Cell

  1. 1. School of Physics and Electronic Technology, Liaoning Normal University, Dalian, 116029, China; 2. State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
  • Online:2022-04-20 Published:2022-04-25

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摘要：

深入了解钙钛矿太阳能电池中微纳空间形貌特征、光电特性与光伏参数之间的关系，对于 指导高效钙钛矿太阳能电池器件的构建至关重要。本文通过将时间分辨共聚焦荧光显微镜与光电 流检测模块相结合，实现了二维（2D）层状钙钛矿太阳能电池在实际工作条件下微纳空间的光电 流、荧光强度和荧光寿命成像检测。发现在钙钛矿多晶膜中同一个晶粒的不同区域，光电流与荧 光强度和荧光寿命成像之间存在明显的负相关性，在微纳空间尺度上建立了光伏参数与材料光电 性质和形貌之间的相互关联，为钙钛矿太阳能电池的性能优化提供了理论指导。

关键词: 光电流成像, 二维钙钛矿, 太阳能电池, 荧光成像

Abstract:

Developing an interplay between the local morphological character, optoelectronic properties and its local photovoltaic parameters in a perovskite thin film is essential for guiding the construction of highly-efficient perovskite solar cells (PSC). In this work, by using a laserscanned and time-resolved confocal microscopy coupled with a picoammeter detection module, we realize in-situ photoluminescence (PL) intensity, PL lifetime, and photocurrent mappings in a two-dimensional (2D) PSC. A significant negative correlation is found between photocurrent and PL intensity and PL lifetime imaging within grains of the perovskite polycrystalline film. We establish the correlation between local photovoltaic parameters, optoelectronic properties, and morphology character, which provides theoretical guidance for the optimization of PSC performance.

Key words: photocurrent mapping, 2D perovskite, solar cells, photoluminescence mapping

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