Deep Absorbing Porphyrin Small Molecule for High-Performance Organic Solar Cells with Very Low Energy Losses

被引：441

作者：

Gao, Ke ^{[1
]}

Li, Lisheng ^{[1
]}

Lai, Tianqi ^{[1
]}

Xiao, Liangang ^{[1
]}

Huang, Yuan ^{[1
]}

Huang, Fei ^{[1
]}

Peng, Junbiao ^{[1
]}

Cao, Yong ^{[1
]}

Liu, Feng ^{[2
]}

Russell, Thomas P. ^{[2
,3
]}

Janssen, Rene A. J. ^{[4
]}

Peng, Xiaobin ^{[1
]}

机构：

[1] S China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China

[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

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

[4] Eindhoven Univ Technol, Mol Mat & Nanosyst, NL-5600 MB Eindhoven, Netherlands

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2015年 / 137卷 / 23期

基金：

中国国家自然科学基金; 对外科技合作项目（国际科技项目）;

关键词：

PROCESSED SMALL-MOLECULE; OPEN-CIRCUIT VOLTAGE; POLYMER; BENZODITHIOPHENE; EFFICIENCY; DIKETOPYRROLOPYRROLE; UNIT;

D O I：

10.1021/jacs.5b03740

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We designed and synthesized the DPPEZnP-TEH molecule, With a porphyrin ring linked to two diketopyrrolopyrrole units by ethynylene bridges. The resulting material exhibits a very low energy band gap of 1.37 eV and a broad light absorption to 907 nth. An open-circuit voltage of 0:78 V was obtained in bulk heterojunction (BHJ) organic solar cells, showing a low energy loss of only 0.59 eV,. Which is the first report that small molecule solar cells show energy losses <0.6 eV. The optimized solar cells show remarkable external quantum efficiency, short circuit current, and power conversion efficiency up to 65%, 16.76 mA/cm(2), and 8.08%, respectively, which are the best values for BHJ solar cells with very low energy losses. Additionally, the morphology of DPPEZnP-TEH neat and blend films with PC61BM was studied thoroughly by grazing incidence X-ray diffraction, resonant soft X-ray scattering, and transmission electron microscopy under different fabrication conditions.

引用

页码：7282 / 7285

页数：4

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