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基于逐层气相沉积制备的钙钛矿薄膜调控和器件性能优化
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作者单位:

1.五邑大学智能制造学部,广东 江门 529020;2.暨南大学信息科学与技术学院新能源技术研究所,广东 广州510632

作者简介:

杨进海,硕士研究生,研究方向为钙钛矿太阳能电池,E-mail: jinhaiyang96@163.com。

通讯作者:

吴绍航,博士,副研究员,研究方向为有机无机杂化钙钛矿太阳能电池,E-mail: wushaohang@jnu.edu.cn

中图分类号:

O484.5

基金项目:

广东省重点领域研发计划项目 (2019B010132004);广东省基础与应用基础研究粤佛联合基金重点项目(2021B1515120003)


Perovskite Film Regulation and Device Performance Optimization Based on Layer-by-Layer Vapor Deposition
Author:
Affiliation:

1.School of Intelligent Manufacturing, Wuyi University, Jiangmen 529000, China;2.Institute of New Energy Tech-nology, College of Information Science and Technology, Jinan University, Guangzhou 510632, China

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    摘要:

    真空气相沉积法具有致密性好、均匀性好、膜厚可控等优点,被认为是一种制备大面积、高质量钙钛矿薄膜的关键技术,在工业化生产上有着巨大的应用潜力。但相较于溶液法,气相沉积存在薄膜晶粒尺寸小,结晶度低等缺点,导致器件光电转换效率较低。采用逐层交替气相沉积法制备钙钛矿薄膜,对碘化铅(PbI2)含量进行调控,使用氯化甲胺和碘化甲铵混合溶液进行表面后处理,钝化了薄膜缺陷,提升了薄膜质量。PbI2含量的优化调控了钙钛矿薄膜的化学计量比,器件光电性能得到提高。表面后处理引入的氯离子,使钙钛矿晶粒尺寸增大,结晶度提高。器件的短路电流密度明显提升,最终获得17.76%的光电转换效率以及82.1%的填充因子。

    Abstract:

    The vacuum vapour deposition method has the advantages of good denseness, uniformity and controllable film thickness, and is considered a key technology for preparing large-area, high-quality perovskite films, which has great potential for industrial production. However, compared with the solution method, vapour phase deposition has the disadvantages of small film grain size and low crystallinity, resulting in lower device photoelectric conversion efficiency. In this paper, we use layer-by-layer alternating vapour deposition method to prepare perovskite thin films, and the PbI2 content is regulated and the surface post-treatment of MACl and MAI mixed solution can passivate the defects and improve the quality of the films. The chloride ions introduced by the surface post-treatment increase the size of the perovskite grains and improve the crystallinity. The short-circuit current density of the device was significantly increased, resulting in a final photovoltaic conversion efficiency of 17.76% and a fill factor of 82.1%.

    图1 逐层交替沉积方法图Fig.1 Schematic diagram of alternating layer-by-layer deposition
    图2 反式器件结构图Fig.2 Trans device structure diagram
    图3 不同PbI2含量下的器件J-V特性曲线图和EQE光谱图。Fig.3 Curves of J-V characteristics and EQE spectra of devices with different PbI2 contents
    图4 不同溶液后处理下钙钛矿薄膜的SEM图Fig.4 SEM images of perovskite films under different solution post-treatments
    图5 不同溶液后处理下钙钛矿薄膜的XRD图和紫外-可见吸收光谱图。Fig.5 XRD patterns and UV-vis absorption spectra of perovskite films under different solution post-treatments
    图6 不同溶液后处理的器件J-V曲线图和EQE 曲线图Fig.6 J-V curves and EQE curves of post-treated devices with different solutions
    图7 不同溶液后处理器件的性能参数统计图Fig.7 Statistical charts of performance parameters of post-processing devices with different solutions.
    表 2 不同溶液后处理下制备的钙钛矿器件性能参数Table 2 Performance parameters of perovskite devices prepared under different solution post-treatments
    表 1 不同PbI2含量下制备的钙钛矿电池性能参数Table 1 Performance parameters of perovskite cell prepared with different PbI2 contents
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引用本文

杨进海,罗钦荣,吴绍航,李阳.基于逐层气相沉积制备的钙钛矿薄膜调控和器件性能优化[J].材料研究与应用,2023,17(3):544-551.

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  • 收稿日期:2023-02-24
  • 在线发布日期: 2023-06-28
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