高效有机太阳能电池用二噻吩吡嗪基宽带隙聚合物供体。

IF 8.3 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Zongtao Wang,Hao Wang,Lijun Tu,Qiang Guo,Weiwei He,Yongqiang Shi,Erjun Zhou
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引用次数: 0

摘要

开发一种宽禁带聚合物供体对于实现高性能有机太阳能电池具有重要意义。本文首次利用二噻唑吡嗪(DTPz)的供电子(A)单元,分别以苯二噻吩(BDT)和苯二呋喃(BDF)为共聚给电子(D)单元,构建了新型D-A型共聚物DTPz-1和DTPz-2。与DTPz-1相比,DTPz-2具有与L8-BO非富勒烯受体(nfa)的级联能级、合适的相分离尺度、强的分子填充和高的电荷迁移率。结果表明,DTPz-2/L8-BO器件的功率转换效率(PCE)为15.03%,而DTPz-1/L8-BO器件的PCE仅为8.14%。本研究不仅为制备高效率的D-A型聚合物给体提供了一种新的结构单元,而且证明了BDF在设计某些D-A型光伏给体时可能比经典BDT更合适。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Dithienopyrazine-Based Wide Band Gap Polymer Donor for Efficient Organic Solar Cells.
Developing a wide band gap polymer donor is highly important for realizing high-performance organic solar cells (OSCs). Herein, we are the first to utilize the dithienopyrazine (DTPz) electron-accepting (A) unit to construct novel D-A type copolymers, namely, DTPz-1 and DTPz-2, using benzodithiophene (BDT) and benzodifuran (BDF) as the copolymerizing electron-donating (D) units, respectively. Compared with DTPz-1, DTPz-2 exhibits a cascade energy level with nonfullerene acceptors (NFAs) of L8-BO, proper phase separation scale, strong molecular packing, and high charge mobility. As a result, the device based on DTPz-2/L8-BO achieves a higher power conversion efficiency (PCE) of 15.03% compared with DTPz-1/L8-BO, which has a PCE of 8.14%. This study not only provides a new A structural unit for fabricating high-efficiency D-A type polymer donors but also proves that BDF may be more suitable than classic BDT when designing certain D-A type photovoltaic donors.
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来源期刊
ACS Applied Materials & Interfaces
ACS Applied Materials & Interfaces 工程技术-材料科学:综合
CiteScore
16.00
自引率
6.30%
发文量
4978
审稿时长
1.8 months
期刊介绍: ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.
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