{"title":"Solution-processing induced H-aggregate of Perylene-Diimide Zwitterion Exhibiting Compact Molecular Stacking toward Efficient Cathode Modification in Organic Solar Cells","authors":"Zhi-Guo Zhang, Zhe Li, Yanhe Xiang, Jiayu Li, Luxin Feng, Ming Zhang, Shouke Yan, Bowei Xu","doi":"10.1002/anie.202413986","DOIUrl":null,"url":null,"abstract":"High-performance organic cathode interlayers (CILs) play a crucial role in the advance of organic solar cells (OSCs). However, organic CILs have exhibited inferior performances to their inorganic counterparts over a long time, due to the inherent shortcoming of poor charge transporting capability. Here, we designed and synthesized a perylene-diimide (PDI) zwitterion PDI-B as high-performance organic CIL for OSCs. We revealed that an obvious H-aggregate of PDI-B was formed during the solution processing, thereby significantly enhancing the charge transporting capability of the CIL. Compared to the classic PDINN, the π-π stacking distance of PDI-B was reduced from 4.2 Å to 3.9 Å, which further facilitated the charge transport. Consequently, PDI-B showed a high conductivity of 1.81×10−3S/m; this is comparable to that of inorganic CILs. The binary OSC showed an elevated PCE of 19.23%, which is among the highest PCE values for binary OSCs. Benefitting from improved solvent resistance and good compatibility with large-area processing method of PDI-B, the photovoltaic performances of inverted and 1-cm2 OSC were significantly improved. The results from this work provide a new approach of optimizing the condensed structure of PDI film to boost the charge conductivity, opening an avenue to develop high-performance PDI-based CILs.","PeriodicalId":125,"journal":{"name":"Angewandte Chemie International Edition","volume":null,"pages":null},"PeriodicalIF":16.1000,"publicationDate":"2024-09-21","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.202413986","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
High-performance organic cathode interlayers (CILs) play a crucial role in the advance of organic solar cells (OSCs). However, organic CILs have exhibited inferior performances to their inorganic counterparts over a long time, due to the inherent shortcoming of poor charge transporting capability. Here, we designed and synthesized a perylene-diimide (PDI) zwitterion PDI-B as high-performance organic CIL for OSCs. We revealed that an obvious H-aggregate of PDI-B was formed during the solution processing, thereby significantly enhancing the charge transporting capability of the CIL. Compared to the classic PDINN, the π-π stacking distance of PDI-B was reduced from 4.2 Å to 3.9 Å, which further facilitated the charge transport. Consequently, PDI-B showed a high conductivity of 1.81×10−3S/m; this is comparable to that of inorganic CILs. The binary OSC showed an elevated PCE of 19.23%, which is among the highest PCE values for binary OSCs. Benefitting from improved solvent resistance and good compatibility with large-area processing method of PDI-B, the photovoltaic performances of inverted and 1-cm2 OSC were significantly improved. The results from this work provide a new approach of optimizing the condensed structure of PDI film to boost the charge conductivity, opening an avenue to develop high-performance PDI-based CILs.
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.