The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
ACS Appl Mater Interfaces. 2011 Jul;3(7):2275-80. doi: 10.1021/am200145t. Epub 2011 Jul 1.
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 × 10(4) to 1 × 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 × 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%.
我们报告了一系列寡聚噻吩-二酮吡咯并吡咯-富勒烯三联体的特性，并将其用作溶液处理有机太阳能电池 (OSC) 的活性材料。通过将二酮吡咯并吡咯 (DPP) 核心与富电子寡聚噻吩单元和富电子富勒烯单元结合，制备了多功能电子分子；这些分子在常见有机溶剂中具有高溶解性、高光物理性能，具有高消光系数（1×10(4)至 1×10(5) M(-1) cm(-1))和宽吸收光谱覆盖范围（250-800nm），以及合适的分子轨道能级（HOMO 约为-5.1eV，LUMO 约为-3.7eV）。这些三联体的溶液处理薄膜有机场效应晶体管 (OFET) 显示出良好的 n 型特性，电子迁移率高达 1.5×10(-3) cm(2) V(-1) s(-1)。使用这些多功能三联体，已经制造了单组分 OSC，在 AM 1.5G 模拟 1 太阳太阳光照射下，其功率转换效率 (PCE) 高达 0.5%。将这些分子与聚(3-己基噻吩) (P3HT) 共混可获得体异质结 OSC，其 PCE 高达 2.41%。
