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The Curious Case of Fluorination of Conjugated Polymers for Solar Cells
Accounts of Chemical Research ( IF 18.3 ) Pub Date : 2017-09-05 00:00:00 , DOI: 10.1021/acs.accounts.7b00326
Qianqian Zhang 1 , Mary Allison Kelly 1 , Nicole Bauer 1 , Wei You 1, 2
Affiliation  

Organic solar cells (OSCs) have been a rising star in the field of renewable energy since the introduction of the bulk heterojunction (BHJ) in 1992. Recent advances have pushed the efficiencies of OSCs to over 13%, an impressive accomplishment via collaborative efforts in rational materials design and synthesis, careful device engineering, and fundamental understanding of device physics. Throughout these endeavors, several design principles for the conjugated donor polymers used in such solar cells have emerged, including optimizing the conjugated backbone with judicious selection of building blocks, side-chain engineering, and substituents. Among all of the substituents, fluorine is probably the most popular one; improved device characteristics with fluorination have frequently been reported for a wide range of conjugated polymers, in particular, donor–acceptor (D–A)-type polymers. Herein we examine the effect of fluorination on the device performance of solar cells as a function of the position of fluorination (on the acceptor unit or on the donor unit), aiming to outline a clear understanding of the benefits of this curious substituent.

中文翻译:

太阳能电池共轭聚合物氟化的奇怪案例

自从1992年引入体异质结(BHJ)以来,有机太阳能电池(OSC)一直是可再生能源领域的一颗冉冉升起的新星。最近的进展将OSC的效率提高到13%以上,这是通过在太阳能电池领域的合作努力取得的令人瞩目的成就。合理的材料设计和合成,仔细的设备工程以及对设备物理的基本了解。在这些努力中,出现了用于这种太阳能电池的共轭供体聚合物的几种设计原理,包括通过明智地选择结构单元,侧链工程和取代基来优化共轭骨架。在所有取代基中,氟可能是最流行的取代基。广泛报道了多种共轭聚合物具有氟化作用的改善的器件特性,特别是,供体-受体(D-A)型聚合物。在本文中,我们研究了氟化对太阳能电池器件性能的影响,该影响是氟化位置(在受体单元上或在给体单元上)的函数,旨在概述对这种奇怪取代基的益处的清楚理解。
更新日期:2017-09-05
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