Novel Dimethylmethylene‐Bridged Triphenylamine‐PDI Acceptor for Bulk‐Heterojunction Organic Solar Cells,Advanced Science

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Novel Dimethylmethylene‐Bridged Triphenylamine‐PDI Acceptor for Bulk‐Heterojunction Organic Solar Cells
Advanced Science ( IF 14.3 ) Pub Date : 2017-06-22 , DOI: 10.1002/advs.201700110
Yu Xiong _{1,

2} , Bo Wu ₁ , Xiaoyan Zheng ₃ , Zheng Zhao _{2,

3} , Ping Deng ₁ , Ming Lin ₄ , Benzhong Tang _{2,

3} , Beng S Ong ₁

Affiliation

A novel, star‐shaped electron acceptor, DMTPA‐PDI₃, derived from a planar dimethylmethylene‐bridged triphenylamine core with three acetylene‐linked perylene diimide (PDI) units is developed as a nonfullerene acceptor for organic solar cells (OSCs). DMTPA‐PDI₃ manifests significantly reduced intramolecular twisting, enabling sufficient system‐wide π‐electron delocalization leading to broadened spectral absorption and raised lowest unoccupied molecular orbital level. As a result, higher and more balanced hole and electron transport properties are observed. Active layers for OSCs comprising DMTPA‐PDI₃ acceptor and PBT7‐Th donor exhibit suppressed intermolecular aggregation, giving rise to uniform nanophase network formation. These OSC devices have afforded respectably high power‐conversion efficiency of about 5%.

中文翻译：

用于体异质结有机太阳能电池的新型二甲基亚甲基桥联三苯胺-PDI受体

一种新型星形电子受体 DMTPA-PDI ₃衍生自具有三个乙炔连接的苝二酰亚胺 (PDI) 单元的平面二甲基亚甲基桥联三苯胺核心，被开发为有机太阳能电池 (OSC) 的非富勒烯受体。DMTPA-PDI ₃表现出显着减少的分子内扭曲，从而实现足够的全系统 π 电子离域，从而扩大光谱吸收并提高最低未占据分子轨道能级。结果，观察到更高且更平衡的空穴和电子传输性能。_{包含 DMTPA-PDI 3}受体和 PBT7-Th 供体的 OSC 活性层表现出抑制的分子间聚集，从而形成均匀的纳米相网络。这些 OSC 器件提供了约 5% 的相当高的功率转换效率。

更新日期：2017-06-22

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