钝化剂乙酰水杨酸对钙钛矿太阳能电池性能影响的研究

人工晶体学报 ›› 2022, Vol. 51 ›› Issue (6): 1042-1050.

钝化剂乙酰水杨酸对钙钛矿太阳能电池性能影响的研究

任锦涛¹, 陈青¹, 霍宇^1,2, 吴治昕¹, 余春燕^1,2, 翟光美^1,3

1.太原理工大学新材料界面科学与工程教育部重点实验室,太原 030024;
2.太原理工大学材料科学与工程学院,太原 030024;
3.中国科学院可再生能源重点实验室,广州 510640

收稿日期:2022-03-15 出版日期:2022-06-15 发布日期:2022-07-18
通讯作者: 翟光美,博士,讲师。E-mail:zhaiguangmei@tyut.edu.cn
作者简介:任锦涛(1997—),男,山西省人,硕士研究生。E-mail:786906479@qq.com
基金资助:
山西省基础研究计划(201701D221079,202103021224055);中国科学院可再生能源重点实验室开放基金(Y807k31001);国家自然科学基金(61475110)

Effect of Acetylsalicylic Acid Passivator on the Performance of Perovskite Solar Cells

REN Jintao¹, CHEN Qing¹, HUO Yu^1,2, WU Zhixin¹, YU Chunyan^1,2, ZHAI Guangmei^1,3

1. Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology,Taiyuan 030024, China;
2. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
3. Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, China

Received:2022-03-15 Online:2022-06-15 Published:2022-07-18

摘要/Abstract

摘要： 有机-无机杂化钙钛矿太阳能电池因其优异的光电性能和低廉的制备成本,成为目前光伏领域内的研究热点。然而,钙钛矿薄膜表面和晶界处存在大量缺陷,这易于导致载流子非辐射复合,并进而影响太阳能电池的光电转换效率。本工作通过在两步法制备钙钛矿的铅盐前驱液中引入钝化剂乙酰水杨酸(acetylsalicylic acid, ASA),利用吸收/光致发光光谱、扫描电镜和电学测试等技术手段研究了ASA分子对钙钛矿薄膜质量与器件性能的影响。结果表明:适量的ASA分子可以通过路易斯酸碱相互作用增大钙钛矿晶粒尺寸,并有效降低钙钛矿薄膜的缺陷密度;当ASA的浓度为2.5 mmol/L时,所制得的钙钛矿电池取得了19.83%的最高光电转换效率,明显高于对照器件的转换效率(17.47%)。本工作首次报道了ASA对钙钛矿薄膜缺陷的良好钝化效果,并为提高钙钛矿太阳能电池性能提供了一种简单有效的制备方法。

关键词: 钙钛矿太阳能电池, 有机-无机杂化, 金属卤化物, 乙酰水杨酸, 缺陷钝化, 两步沉积, 添加剂, 光电转换

Abstract: Organic-inorganic hybrid perovskite solar cells have attracted much attention due to their excellent optoelectronic properties and low preparation cost. However, a large number of defects exist on the surface and grain boundaries of perovskite films, which lead to non-radiative recombination of carriers and affect the photoelectric conversion efficiency of solar cells. In this work, acetylsalicylic acid (ASA) was introduced into the lead salt solution as a passivator to prepare perovskite films and solar cells via a two-step method. The impacts of acetylsalicylic acid on film quality and cell performance were investigated by means of optical spectroscopy, scanning electron microscopy and various electrical measurements. The results show that the introduction of appropriate amount of ASA can obviously increase the grain size of perovskite films and effectively reduce the defect density of perovskite films via Lewis acid-base interaction. The solar cell prepared with the incorporation of 2.5 mmol/L ASA achieves the highest photoelectric conversion efficiency of 19.83%, appreciably outperforming the control device (17.47%). This work highlights the efficacy of ASA in passivating defects of perovskite films and provides a facile method to improve the performance of perovskite solar cells.

Key words: perovskite solar cell, organic-inorganic hybrid, metal halide, acetylsalicylic acid, defect passivation, two-step deposition, additive, photoelectric conversion

中图分类号:

TM914.4

任锦涛, 陈青, 霍宇, 吴治昕, 余春燕, 翟光美. 钝化剂乙酰水杨酸对钙钛矿太阳能电池性能影响的研究[J]. 人工晶体学报, 2022, 51(6): 1042-1050.

REN Jintao, CHEN Qing, HUO Yu, WU Zhixin, YU Chunyan, ZHAI Guangmei. Effect of Acetylsalicylic Acid Passivator on the Performance of Perovskite Solar Cells[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2022, 51(6): 1042-1050.

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