An A-D-A'-D-A type small molecule acceptor with a broad absorption spectrum for organic solar cells

被引:73
|
作者
Miao, Junhui [1 ,2 ]
Meng, Bin [1 ]
Liu, Jun [1 ]
Wang, Lixiang [1 ]
机构
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Peoples R China
基金
中国国家自然科学基金;
关键词
PANCHROMATIC SMALL MOLECULES; ENERGY-LEVEL MODULATION; CONJUGATED POLYMERS; ELECTRON-ACCEPTORS; ZINC PHTHALOCYANINE; FULLERENE-POLYMER; RING-FUSION; SIDE-CHAIN; PERFORMANCE; EFFICIENCY;
D O I
10.1039/c7cc08497h
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Organic molecules with wide absorption spectra exhibit great sunlight harvesting capability and are critically important for solar cell applications. In this manuscript, we develop an A-D-A'-D-A type small molecule acceptor (IID-IC) using isoindigo (IID) as the electrondeficient core unit (A'), thiophene as the electron-rich bridging units (D) and 2-(3-oxo-2,3-dihydroinden-1-ylidene) malononitrile (IC) as the electron-deficient endcapping groups (A). IID-IC shows a wide absorption spectrum with the full width at half maximum (FWHM) of 190 nm, which is almost twice that of a typical A-D-A type molecule acceptor. The wide absorption spectrum of IID-IC is possibly due to the partially suppressed intramolecular charge transfer effect with the additional electron-deficient core unit. An organic solar cell (OSC) device based on IID-IC exhibits the power conversion efficiency of 2.82% with broad photoresponse from 320 nm to 780 nm.
引用
收藏
页码:303 / 306
页数:4
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