DeCarbonPub Date : 2023-06-01DOI: 10.1016/j.decarb.2023.100004
Xiao Chen , Bing Guo , Zeyu Zhang , Bo Zhang , Xinzhi Zu , Nabonswende Aida Nadege Ouedraogo , Jiyeon Oh , Yongjoon Cho , George Omololu Odunmbaku , Kun Chen , Yongli Zhou , Shanshan Chen , Changduk Yang , Juan Du , Kuan Sun
{"title":"Binary hole transport layer enables stable perovskite solar cells with PCE exceeding 24%","authors":"Xiao Chen , Bing Guo , Zeyu Zhang , Bo Zhang , Xinzhi Zu , Nabonswende Aida Nadege Ouedraogo , Jiyeon Oh , Yongjoon Cho , George Omololu Odunmbaku , Kun Chen , Yongli Zhou , Shanshan Chen , Changduk Yang , Juan Du , Kuan Sun","doi":"10.1016/j.decarb.2023.100004","DOIUrl":"https://doi.org/10.1016/j.decarb.2023.100004","url":null,"abstract":"<div><p>Hygroscopic dopant in hole transport layer (HTL) is a key factor contributing to moisture-induced perovskite degradation and the resulting performance loss over time. This poses obstacles to the commercialization of perovskite solar cells (PSCs). Herein, we mixed two popular hole transport materials, i.e., [2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenyl-amine)9,9′-spirobifluorene] (Spiro-OMeTAD) and poly (3-hexylthiophene-2,5-diyl) (P3HT), to form a binary mixed HTL. Due to the presence of hydrophobic P3HT component, the mixed HTL exhibits improved moisture resistance. In addition, P3HT demonstrates a great ability to interact with the dopants, which changes π-π packing orientation of P3HT from edge-on to face-on and improves its crystallinity, thus increasing hole mobility and hole extraction capability of the mixed HTL. As a result, PSCs equipped with the Spiro-OMeTAD/P3HT mixed HTL exhibit a champion power conversion efficiency (PCE) up to 24.3% and superior operational stability. The cells without encapsulation can maintain 90% initial efficiency after storage in dark ambient conditions (30% RH) for 1200 h. These results suggest that constructing Spiro-OMeTAD/P3HT mixed HTL is a promising strategy to meet the future photovoltaic applications demands with low-cost as well as excellent efficiency and device stability.</p></div>","PeriodicalId":100356,"journal":{"name":"DeCarbon","volume":"1 ","pages":"Article 100004"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49754992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}