Borane Incorporation in a Non-Fullerene Acceptor To Tune Steric and Electronic Properties and Improve Organic Solar Cell Performance
Borane Incorporation in a Non-Fullerene Acceptor To Tune Steric and Electronic Properties and Improve Organic Solar Cell Performance
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DOI：
10.1021/acsaem.8b01793
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发表时间：
2019-01
影响因子：
6.4
通讯作者：
Thomas A. Welsh;Audrey Laventure;A. F. Alahmadi;Guanghui Zhang;T. Baumgartner;Y. Zou;F. Jäkle;Gregory C. Welch
中科院分区：
文献类型：
--
作者：
Thomas A. Welsh;Audrey Laventure;A. F. Alahmadi;Guanghui Zhang;T. Baumgartner;Y. Zou;F. Jäkle;Gregory C. Welch
在这里，我们研究了硼烷掺入的影响，在二萘嵌苯二酰亚胺（PDI）为基础的非富勒烯受体（NFA）。我们之前已经证明，PDI-联噻吩-PDI（（PDI）2 Th 2）化合物可以通过直接（杂）芳基化技术合成，并且容易被修饰以在联噻吩核心（（PDI）2 Th 2 PO）中掺入磷杂环戊二烯以调节电子和几何性质。在这项工作中，我们合成了硼烷类似物（（PDI）2 Th 2B），并证明了有机硼部分严重影响的光学，电子和几何性质。为了确定硼烷官能化对器件性能的影响，分别使用中等带隙供体聚合物TTSix-T1和每种PDI化合物作为NFA来制造绿色溶剂溶液处理的本体异质结太阳能电池。具有新的含硼烷化合物的器件提供了最高的效率，是其他化合物的两倍多，这归因于高度扭曲的结构，允许更多的自由度。
Herein we study the effects of borane incorporation in a perylene diimide (PDI)-based non-fullerene acceptor (NFA). We have previously demonstrated that a PDI-bithiophene-PDI ((PDI)2Th2) compound can be synthesized via direct (hetero)arylation techniques and is easily modified to incorporate a phosphole in the bithiophene core ((PDI)2Th2PO) to tune the electronic and geometric properties. In this work, we have synthesized the borane analogue ((PDI)2Th2B) and demonstrated that the organoboron moiety heavily influences the optical, electronic, and geometric properties. To determine the effects of borane functionalization on device performance, green solvent solution-processed bulk-heterojunction solar cells were fabricated using a medium-gap donor polymer TTFQx-T1 and each PDI compound as the NFA, respectively. Devices with the new borane-containing compound provided the highest efficiency, more than twice that for the other compounds, which was attributed to a highly twisted structure allowing for a more f...