2′-羟基苯乙酮二步钝化钙钛矿缺陷  

Passivation of perovskite defects by 2′-hydroxyacetophenone in two steps

作　　者：陈俊杰 宋立新[2] 熊杰[2] CHEN Junjie;SONG Lixin;XIONG Jie(School of Materials Science&-Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China;College of Textile Science and Engineering(International Institute of Silk),Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学材料科学与工程学院,杭州310018 [2]浙江理工大学纺织科学与工程学院(国际丝绸学院),杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2022年第2期195-202,共8页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：浙江省自然科学基金项目(LQ19E030020)。

摘　　要：为钝化钙钛矿缺陷,采用2′-羟基苯乙酮(2-HA)以添加剂和表面改性剂的形式对钙钛矿薄膜进行二次处理,分析其对钙钛矿薄膜形貌、结构和性能的影响。结果表明:2-HA分子的羰基可以与钙钛矿中失配的铅离子形成配位键,从而钝化钙钛矿薄膜晶界处和表面的缺陷。2-HA作为添加剂可促进钙钛矿结晶,使得薄膜质量提升,提升了薄膜光吸收能力。同时,采用2-HA表面处理钙钛矿薄膜,可进一步减少了薄膜表面的缺陷。此外,位于钙钛矿表面的苯环增强了对空气水分的抵抗能力。因此,经过2-HA钝化作用的钙钛矿薄膜在开放空气环境中可制备高效的太阳能电池,光电转化效率达到17.69%,且长期稳定性得到提高。该研究为钙钛矿太阳能电池的商业化提供了一种简便的策略。In order to passivate perovskite defects, perovskite films were treated twice using 2′-hydroxyacetophenone(2-HA) 2′-hydroxyacetophenone(2-HA) in the form of additive and surface modifier, and their effects on the morphology, structure and properties of perovskite films were analyzed. The results show that the carbonyl group of 2-HA molecules can form coordination bonds with mismatched lead ions in perovskite, thereby passivating the defects at the grain boundaries and surfaces of perovskite films. As an additive, 2-HA can promote the crystallization of perovskite, enhance the quality of films and improve the light absorption capacity of films. At the same time, the surface defects of perovskite films can be further reduced through surface treatment with 2-HA. In addition, the benzene ring on the surface of perovskite can improve resistance to air moisture. Therefore, the perovskite films passivated by 2-HA can be used to prepare efficient solar cells in open air environments. The photoelectric conversion efficiency can reach 17.69%, and the long-term stability is improved. This study provides a simple and convenient strategy for the commercialization of perovskite solar cells.

关 键 词：2′-羟基苯乙酮 钙钛矿 太阳能电池 缺陷钝化 表面改性 

分 类 号：TM914.4[电气工程—电力电子与电力传动]