Dithienopyrrole Based Small Molecule with Low Band Gap for Organic Solar Cells  

作　　者：Miaomiao Li Wang Ni Huanran Feng Bin Kan Xiangjian Wan Yamin Zhang Xuan Yang Yongsheng Chen 

机构地区：[1]Key Laboratory for Functional Polymer Materials, Centre for Nanoscale Science and Technology,Institute of Polymer Chemistry, Collaborative Innovation of Chemical Science and Engineering ( Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China

出　　处：《Chinese Journal of Chemistry》2015年第8期852-858,共7页中国化学（英文版）

摘　　要：A low band gap acceptor-donor-acceptor （A-D-A） small molecule donor material, named DR3TDTN, has been designed and synthesized for solution-processed organic solar cells. DR3TDTN shows narrow optical band gap with value of 1.49 eV and broad absorption spectrum from 300 to 820 rim. The HOMO and LUMO energy levels of DR3TDTN are -4.74 and -3.26 eV, respectively. The optimized photovoltaic device based on DR3TDTN：PC71BM blend film shows a power conversion efficiency of 3.03% with an open-circuit voltage of 0.67 V, a short-circuit current of 8.22 mA·cm^-2 and fill factor of 0.55.A low band gap acceptor-donor-acceptor （A-D-A） small molecule donor material, named DR3TDTN, has been designed and synthesized for solution-processed organic solar cells. DR3TDTN shows narrow optical band gap with value of 1.49 eV and broad absorption spectrum from 300 to 820 rim. The HOMO and LUMO energy levels of DR3TDTN are -4.74 and -3.26 eV, respectively. The optimized photovoltaic device based on DR3TDTN：PC71BM blend film shows a power conversion efficiency of 3.03% with an open-circuit voltage of 0.67 V, a short-circuit current of 8.22 mA·cm^-2 and fill factor of 0.55.

关 键 词：organic solar cells low band gap small molecule HOMO energy level 

分 类 号：TM914.4[电气工程—电力电子与电力传动] O484[理学—固体物理]