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PDI Derivative through Fine-Tuning the Molecular Structure for Fullerene-Free Organic Solar Cells
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-08-28 00:00:00 , DOI: 10.1021/acsami.7b08282 Hua Sun 1, 2 , Xin Song 1 , Jian Xie 2 , Po Sun 1 , Peiyang Gu 2 , Changmei Liu 1 , Fei Chen 1 , Qichun Zhang 2, 3 , Zhi-Kuan Chen 1 , Wei Huang 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-08-28 00:00:00 , DOI: 10.1021/acsami.7b08282 Hua Sun 1, 2 , Xin Song 1 , Jian Xie 2 , Po Sun 1 , Peiyang Gu 2 , Changmei Liu 1 , Fei Chen 1 , Qichun Zhang 2, 3 , Zhi-Kuan Chen 1 , Wei Huang 1
Affiliation
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A perylenediimide-based (PDI-based) small molecular (SM) acceptor with both an extended π-conjugation and a three-dimensional structure concurrently is critical for achieving high-performance PDI-based fullerene-free organic solar cells (OSCs). Herein, a novel PDI-based SM acceptor has been successfully synthesized through fusing PDI units with a spiro core 4,4′-spirobi[cyclopenta[2,1-b;3,4-b′]dithiophene (SCPDT) together via β-position coupling with thiophene bridges. An enhanced absorption from 350 to 520 nm has been observed. Moreover, compared with previously reported acceptor SCPDT-PDI4, in which the PDI units and SCPDT are not fused together, the LUMO energy level of FSP (the new SCPDT-based molecule) increases. OSCs containing PTB7-Th as a donor and FSP as an acceptor have been demonstrated to show an excellent performance with a power conversion efficiency as high as 8.89%. This result might be attributed to the efficient and complementary photoabsorption, balanced carrier mobilities, and favorable phase separation in the blend film. This research could offer an effective strategy to design novel high-performance PDI-based acceptors.
中文翻译：
通过微调无富勒烯有机太阳能电池分子结构的PDI衍生物
同时具有扩展的π-共轭和三维结构的基于per二酰亚胺（基于PDI）的小分子（SM）受体对于实现高性能的基于PDI的不含富勒烯的有机太阳能电池（OSC）至关重要。本文中，通过将PDI单元与螺芯4,4'-spirbibi [cyclopenta [2,1-b; 3,4-b'] dithiophene（SCPDT）一起通过β融合，已成功合成了基于PDI的新型SM受体。位与噻吩桥偶联。已观察到从350到520 nm的吸收增强。此外，与之前报道的受体SCPDT-PDI 4（其中PDI单元和SCPDT不融合在一起）相比，FSP（基于SCPDT的新分子）的LUMO能级提高了。包含PTB7-Th作为供体和FSP的OSC已经证明作为受体的α-烯烃显示出优异的性能，并且其功率转换效率高达8.89％。该结果可能归因于共混膜中有效和互补的光吸收，平衡的载流子迁移率以及有利的相分离。这项研究可以为设计新型高性能基于PDI的受体提供有效的策略。
更新日期：2017-08-28
中文翻译：
通过微调无富勒烯有机太阳能电池分子结构的PDI衍生物
同时具有扩展的π-共轭和三维结构的基于per二酰亚胺（基于PDI）的小分子（SM）受体对于实现高性能的基于PDI的不含富勒烯的有机太阳能电池（OSC）至关重要。本文中，通过将PDI单元与螺芯4,4'-spirbibi [cyclopenta [2,1-b; 3,4-b'] dithiophene（SCPDT）一起通过β融合，已成功合成了基于PDI的新型SM受体。位与噻吩桥偶联。已观察到从350到520 nm的吸收增强。此外，与之前报道的受体SCPDT-PDI 4（其中PDI单元和SCPDT不融合在一起）相比，FSP（基于SCPDT的新分子）的LUMO能级提高了。包含PTB7-Th作为供体和FSP的OSC已经证明作为受体的α-烯烃显示出优异的性能，并且其功率转换效率高达8.89％。该结果可能归因于共混膜中有效和互补的光吸收，平衡的载流子迁移率以及有利的相分离。这项研究可以为设计新型高性能基于PDI的受体提供有效的策略。
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