Small Molecules Based on Benzo[1,2-b:4,5-b′]dithiophene Unit for High-Performance Solution-Processed Organic Solar Cells

被引：553
|
作者：
Zhou, Jiaoyan [1 ,2 ]
Wan, Xiangjian [1 ,2 ]
Liu, Yongsheng [1 ,2 ]
Zuo, Yi [1 ,2 ]
Li, Zhi [1 ,2 ]
He, Guangrui [1 ,2 ]
Long, Guankui [1 ,2 ]
Ni, Wang [1 ,2 ]
Li, Chenxi [1 ,2 ]
Su, Xuncheng [3 ]
Chen, Yongsheng [1 ,2 ]
机构：
[1] Nankai Univ, Key Lab Funct Polymer Mat, Tianjin 300071, Peoples R China
[2] Nankai Univ, Ctr Nanoscale Sci & Technol, Inst Polymer Chem, Tianjin 300071, Peoples R China
[3] Nankai Univ, State Key Lab Elementoorgan Chem, Coll Chem, Tianjin 300071, Peoples R China
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2012年 / 134卷 / 39期
关键词：
OPEN-CIRCUIT VOLTAGE; NANOSCALE PHASE-SEPARATION; POLYMER; EFFICIENCY; DESIGN; CORE;
D O I：
10.1021/ja306865z
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Small molecules, namely, DCAO(3)TBDT and DR3TBDT, with 2-ethylhexoxy substituted BDT as the central building block and octyl cyanoacetate and 3-ethylrhodanine as different terminal units with the same linkage of dioctyltert-thiophene, have been designed and synthesized. The photovoltaic properties of these two molecules as donors and fullerene derivatives as the acceptors in bulk heterojunction solar cells are studied. Among them, DR3TBDT shows excellent photovoltaic performance, and power conversion efficiency as high as 7.38% (certified 7.10%) under AM 1.5G irradiation (100 mW cm(-2)) has been achieved using the simple solution spin-coating fabrication process, which is the highest efficiency reported to date for any small-molecule-based solar cells. The results demonstrate that structure fine turning could cause significant performance difference and with that the performance of solution-processed small-molecule solar cells can indeed be comparable with or even surpass their polymer counterparts.
引用
收藏
页码：16345 / 16351
页数：7
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