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Nonfused Nonfullerene Acceptors with an A–D–A′–D–A Framework and a Benzothiadiazole Core for High-Performance Organic Solar Cells
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-03-30 , DOI: 10.1021/acsami.0c01850 Shuting Pang 1 , Xia Zhou 1 , Song Zhang 2 , Haoran Tang 1 , Sujata Dhakal 2 , Xiaodan Gu 2 , Chunhui Duan 1 , Fei Huang 1 , Yong Cao 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-03-30 , DOI: 10.1021/acsami.0c01850 Shuting Pang 1 , Xia Zhou 1 , Song Zhang 2 , Haoran Tang 1 , Sujata Dhakal 2 , Xiaodan Gu 2 , Chunhui Duan 1 , Fei Huang 1 , Yong Cao 1
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Nonfullerene acceptors (NFAs) have contributed significantly to the progress of organic solar cells (OSCs). However, most NFAs feature a large fused-ring backbone, which usually requires a tedious multiple-step synthesis, and are not applicable to commercial applications. An alternative strategy is to develop nonfused NFAs, which possess synthetic simplicity and facile tunability in optoelectronic properties and solid-state microstructures. In this work, we report two nonfused NFAs, BTCIC and BTCIC-4Cl, based on an A–D–A′–D–A architecture, which possess the same electron-deficient benzothiadiazole central core but different electron-withdrawing terminal groups. The optical properties, energy levels, and molecular crystallinities were finely tuned by changing the terminal groups. Moreover, a decent power conversion efficiency of 9.3 and 10.5% has been achieved by BTCIC and BTCIC-4Cl, respectively, by blending them with an appropriate polymer donor. These results demonstrate the potential of A–D–A′–D–A type nonfused NFAs for high-performance OSCs. Further development of nonfused NFAs will be very fruitful by employing appropriate building blocks and via side-chain optimizations.
中文翻译：
具有A–D–A'–D–A框架和苯并噻二唑核心的非融合非富勒烯受体，用于高性能有机太阳能电池
非富勒烯受体（NFA）极大地促进了有机太阳能电池（OSC）的发展。但是，大多数NFA具有较大的稠环主链，通常需要繁琐的多步合成，因此不适用于商业应用。一种替代策略是开发非融合NFA，其在光电特性和固态微结构方面具有合成简单性和易调节性。在这项工作中，我们报告了基于A–D–A'–D–A结构的两个非熔融NFA，BTCIC和BTCIC-4Cl，它们具有相同的缺电子苯并噻二唑中心核，但具有不同的吸电子端基。光学特性，能级和分子结晶度通过改变端基进行了微调。而且，不错的功率转换效率为9.3和10。通过将BTCIC和BTCIC-4Cl与适当的聚合物供体混合，分别获得了5％的收率。这些结果证明了A–D–A'–D–A型非融合NFA对于高性能OSC的潜力。通过采用适当的构件并通过侧链优化，非融合NFA的进一步开发将非常有成果。
更新日期：2020-03-30
中文翻译：
具有A–D–A'–D–A框架和苯并噻二唑核心的非融合非富勒烯受体，用于高性能有机太阳能电池
非富勒烯受体（NFA）极大地促进了有机太阳能电池（OSC）的发展。但是，大多数NFA具有较大的稠环主链，通常需要繁琐的多步合成，因此不适用于商业应用。一种替代策略是开发非融合NFA，其在光电特性和固态微结构方面具有合成简单性和易调节性。在这项工作中，我们报告了基于A–D–A'–D–A结构的两个非熔融NFA，BTCIC和BTCIC-4Cl，它们具有相同的缺电子苯并噻二唑中心核，但具有不同的吸电子端基。光学特性，能级和分子结晶度通过改变端基进行了微调。而且，不错的功率转换效率为9.3和10。通过将BTCIC和BTCIC-4Cl与适当的聚合物供体混合，分别获得了5％的收率。这些结果证明了A–D–A'–D–A型非融合NFA对于高性能OSC的潜力。通过采用适当的构件并通过侧链优化，非融合NFA的进一步开发将非常有成果。
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