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 23:07:28 , 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连的三苯胺-PDI受体

新型的星形电子受体DMTPA-PDI ₃衍生自具有三个乙炔键联的per二酰亚胺（PDI）单元的平面二甲基亚甲基桥连的三苯胺核，作为有机太阳能电池（OSC）的非富勒烯受体。DMTPA-PDI ₃显着降低了分子内扭曲，从而实现了系统范围内充分的π电子离域化，从而导致了更宽的光谱吸收并提高了最低的未占据分子轨道水平。结果，观察到更高和更平衡的空穴和电子传输性质。包含DMTPA-PDI _3的OSC的活动层受体和PBT7-Th供体表现出抑制的分子间聚集，从而导致均匀的纳米相网络形成。这些OSC器件可提供约5％的较高功率转换效率。

更新日期：2017-06-24

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