Unveiling the Influence of Additive Acidity on the Long-Term Stability of Perovskite Solar Cells

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2024-12-17 DOI:10.1021/acsmaterialslett.4c0199810.1021/acsmaterialslett.4c01998

Bihui Sun, Pingzhi Zhang, Daqing Zhang, Wenfei Chu, Yuxiao Guo*, Xin Luo, Wei Li* and Bo Xu*,

{"title":"Unveiling the Influence of Additive Acidity on the Long-Term Stability of Perovskite Solar Cells","authors":"Bihui Sun, Pingzhi Zhang, Daqing Zhang, Wenfei Chu, Yuxiao Guo*, Xin Luo, Wei Li* and Bo Xu*, ","doi":"10.1021/acsmaterialslett.4c0199810.1021/acsmaterialslett.4c01998","DOIUrl":null,"url":null,"abstract":"<p >Additive engineering plays a vital role in enhancing perovskite solar cells (PSCs) by passivating defects within the perovskite films. Carboxyl and ester groups are commonly used for their strong binding with under-coordinated Pb<sup>2+</sup> ions. However, the impact of additive acidity on the long-term stability of PSCs remains unclear. This study investigates the functional roles of 4-amino-3,5-difluorobenzoic acid (DFAB-A) and methyl 4-amino-3,5-difluorobenzoate (DFAB-AM), which could effectively passivate the film defects. However, the acidity resulting from carboxyl deprotonation in DFAB-A negatively impacts the structural stability of the perovskites. In contrast, DFAB-AM with its ester functionality forms stronger and more stable bonds, contributing to improved passivation and stability. PSCs incorporating DFAB-AM achieve a high power conversion efficiency of 22.51% and maintain 84.3% of their initial efficiency after 800 h of maximum-power-point operation. These findings underscore the importance of carbonyl group design in developing molecular additives to enhance both the efficiency and the durability of PSCs.</p>","PeriodicalId":19,"journal":{"name":"ACS Materials Letters","volume":"7 1","pages":"265–274 265–274"},"PeriodicalIF":9.6000,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Materials Letters","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsmaterialslett.4c01998","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Additive engineering plays a vital role in enhancing perovskite solar cells (PSCs) by passivating defects within the perovskite films. Carboxyl and ester groups are commonly used for their strong binding with under-coordinated Pb²⁺ ions. However, the impact of additive acidity on the long-term stability of PSCs remains unclear. This study investigates the functional roles of 4-amino-3,5-difluorobenzoic acid (DFAB-A) and methyl 4-amino-3,5-difluorobenzoate (DFAB-AM), which could effectively passivate the film defects. However, the acidity resulting from carboxyl deprotonation in DFAB-A negatively impacts the structural stability of the perovskites. In contrast, DFAB-AM with its ester functionality forms stronger and more stable bonds, contributing to improved passivation and stability. PSCs incorporating DFAB-AM achieve a high power conversion efficiency of 22.51% and maintain 84.3% of their initial efficiency after 800 h of maximum-power-point operation. These findings underscore the importance of carbonyl group design in developing molecular additives to enhance both the efficiency and the durability of PSCs.

Abstract Image

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.