Small-molecule solar cells with efficiency over 9%

被引：776

作者：

Zhang, Qian ^{[1
,2
,3
]}

Kan, Bin ^{[1
,2
,3
]}

Liu, Feng ^{[4
]}

Long, Guankui ^{[1
,2
,3
]}

Wan, Xiangjian ^{[1
,2
,3
]}

Chen, Xiaoqing ^{[5
]}

Zuo, Yi ^{[1
,2
,3
]}

Ni, Wang ^{[1
,2
,3
]}

Zhang, Huijing ^{[1
,2
,3
]}

Li, Miaomiao ^{[1
,2
,3
]}

Hu, Zhicheng ^{[6
]}

Huang, Fei ^{[6
]}

Cao, Yong ^{[6
]}

Liang, Ziqi ^{[5
]}

Zhang, Mingtao ^{[7
]}

Russell, Thomas P. ^{[4
]}

Chen, Yongsheng ^{[1
,2
,3
]}

机构：

[1] Nankai Univ, Coll Chem, Key Lab Funct Polymer Mat, Tianjin 300071, Peoples R China

[2] Nankai Univ, Coll Chem, Inst Polymer Chem, Ctr Nanoscale Sci & Technol, Tianjin 300071, Peoples R China

[3] Nankai Univ, Coll Chem, Synerget Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300071, Peoples R China

[4] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA

[5] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China

[6] S China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China

[7] Nankai Univ, Coll Chem, Computat Ctr Mol Sci, Tianjin 300071, Peoples R China

来源：

NATURE PHOTONICS | 2015年 / 9卷 / 01期

基金：

中国国家自然科学基金;

关键词：

CONJUGATED POLYMERS; CHARGE-TRANSPORT; FILL FACTOR; BULK; PERFORMANCE; RECOMBINATION; PHOTOCURRENT; VOLTAGE; DESIGN;

D O I：

10.1038/NPHOTON.2014.269

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

At present, state-of-the-art single-junction organic photovoltaic devices have power conversion efficiencies of >9% and >8% for polymer- and small-molecule-based devices, respectively. Here, we report a solution-processed organic photovoltaic device based on DRCN7T, which employs an oligothiophene-like small molecule with seven conjugation units as the backbone and 2-(1,1-dicyanomethylene)rhodanine as the terminal unit. With [6,6]-phenyl C-71-butyric acid methyl ester (PC71BM) as the acceptor, an optimized power conversion efficiency of 9.30% (certified at 8.995%) is achieved. The DRCN7T-based devices have a nearly 100% internal quantum efficiency, which we believe is due to an optimized nanoscale interpenetrating donor/acceptor network (with highly crystalline donor fibrils with diameters of similar to 10 nm, close to the exciton diffusion length in organic materials) and the use of an efficient electron transport layer.

引用

页码：35 / 41

页数：7

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