Insights Into the Role of π‐Electrons of Aromatic Aldehydes in Passivating Perovskite Defects

IF 16.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Xiaoqing Jiang, Lina Zhu, Bingqian Zhang, Guangyue Yang, Likai Zheng, Kaiwen Dong, Yanfeng Yin, Minhuan Wang, Shiwei Liu, Shuping Pang, Xin Guo
{"title":"Insights Into the Role of π‐Electrons of Aromatic Aldehydes in Passivating Perovskite Defects","authors":"Xiaoqing Jiang, Lina Zhu, Bingqian Zhang, Guangyue Yang, Likai Zheng, Kaiwen Dong, Yanfeng Yin, Minhuan Wang, Shiwei Liu, Shuping Pang, Xin Guo","doi":"10.1002/anie.202420369","DOIUrl":null,"url":null,"abstract":"Carbonyl‐containing aromatic ketones or aldehydes have been demonstrated to be effective defect passivators for perovskite films to improve performances of perovskite solar cells (PSCs). It has been claimed that both π‐electrons within aromatic units and carbonyl groups can, separately, interact with ionic defects, which, however, causes troubles in understanding the passivation mechanism of those aromatic ketone/aldehyde molecules. Herein, we clarify the effect of both moieties in one molecule on the defect passivation by investigating three aromatic aldehydes with varied conjugation planes, namely, biphenyl‐4‐carbaldehyde (BPCA), naphthalene‐2‐carbaldehyde (NACA) and pyrene‐1‐carbaldehyde (PyCA). Our findings reveal that the π‐electrons located in the conjugated system do not directly present strong passivation for defects, but enhance the electron cloud density of the carbonyl group augmenting its interaction with defect sites; thereby, with the extended conjugation plane of the three molecules, their defect passivation ability is gradually improved. PSCs incorporating PyCA with the most extended π‐electrons delocalization achieve maximum power conversion efficiencies of 25.67% (0.09 cm²) and 21.76% (14.0 cm²). Moreover, these devices exhibit outstanding long‐term stability, retaining 95% of their initial efficiency after operation for 1000 hours at the maximum power point.","PeriodicalId":125,"journal":{"name":"Angewandte Chemie International Edition","volume":"29 1","pages":""},"PeriodicalIF":16.1000,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Angewandte Chemie International Edition","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1002/anie.202420369","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

Abstract

Carbonyl‐containing aromatic ketones or aldehydes have been demonstrated to be effective defect passivators for perovskite films to improve performances of perovskite solar cells (PSCs). It has been claimed that both π‐electrons within aromatic units and carbonyl groups can, separately, interact with ionic defects, which, however, causes troubles in understanding the passivation mechanism of those aromatic ketone/aldehyde molecules. Herein, we clarify the effect of both moieties in one molecule on the defect passivation by investigating three aromatic aldehydes with varied conjugation planes, namely, biphenyl‐4‐carbaldehyde (BPCA), naphthalene‐2‐carbaldehyde (NACA) and pyrene‐1‐carbaldehyde (PyCA). Our findings reveal that the π‐electrons located in the conjugated system do not directly present strong passivation for defects, but enhance the electron cloud density of the carbonyl group augmenting its interaction with defect sites; thereby, with the extended conjugation plane of the three molecules, their defect passivation ability is gradually improved. PSCs incorporating PyCA with the most extended π‐electrons delocalization achieve maximum power conversion efficiencies of 25.67% (0.09 cm²) and 21.76% (14.0 cm²). Moreover, these devices exhibit outstanding long‐term stability, retaining 95% of their initial efficiency after operation for 1000 hours at the maximum power point.
透视芳香族醛的π电子在钝化包晶缺陷中的作用
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
CiteScore
26.60
自引率
6.60%
发文量
3549
审稿时长
1.5 months
期刊介绍: Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信