Diketopyrrolopyrrole-Containing Oligothiophene-Fullerene Triads and Their Use in Organic Solar Cells

被引:53
作者
Chen, Teresa L. [2 ]
Zhang, Yue [2 ]
Smith, Patrizia [1 ]
Tamayo, Arnold [1 ]
Liu, Yi [2 ]
Ma, Biwu [2 ]
机构
[1] Colorado Sch Mines, Golden, CO 80401 USA
[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA
关键词
organic solar cells; diketopyrrolopyrrole; triads; n-type acceptor; intramolecular charge separation; POLYMER PHOTOVOLTAIC CELLS; SMALL-MOLECULE; EFFICIENCY; ACCEPTOR; NETWORK;
D O I
10.1021/am200145t
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
We report the characterization of a series of oligothiophene-diketopyrrolopyrrole-fullerene triads and their use as active materials for solution processed organic solar cells (OSCs). By incorporating the diketopyrrolopyrrole (DPP) core with electron rich oligothiophene units and electron withdrawing fullerene units, multifunctional electronic molecules have been prepared; these molecules show high solubility in common organic solvents, excellent photophysical properties with high extinction coefficients (1 x 10(4) to 1 x 10(5) M-1 cm(-1)) and broad absorption spectra coverage (250-800 nm), as well as suitable molecular orbital energy levels (HOMO of approximately -5.1 eV, LUMO of approximately -3.7 eV). Solution-processed thin-film organic field effect transistors (OFETs) from these triads revealed good n-type characteristics with electron mobilities up to 1.5 x 10(-3) cm(2) V-1 s(-1). With these multifunctional triads, single-component OSCs have been fabricated, exhibiting power conversion efficiencies (PCEs) of up to 0.5 % under AM 1.5 G simulated 1 sun solar illumination. Blending these molecules with poly(3-hexylthiophene) (P3HT) afforded bulk heterojunction OSCs with PCEs reaching as high as 2.41%.
引用
收藏
页码:2275 / 2280
页数:6
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