Self-Organizing Mesomorphic Diketopyrrolopyrrole Derivatives for Efficient Solution-Processed Organic Solar Cells
作者:Woong Shin、Takuma Yasuda、Go Watanabe、Yu Seok Yang、Chihaya Adachi
DOI:10.1021/cm401244x
日期:2013.6.25
describe the synthesis, self-organization, and photovoltaic properties of diketopyrrolopyrrole (DPP)-based mesomorphic small-molecule materials, 3,6-bis5-(4-alkylphenyl)thiophen-2-yl}-2,5-di(2-ethylhexyl)-pyrrolo[3,4-c]pyrrole-1,4-diones (DPP-TP6 and DPP-TP12), which have strong visible absorption characteristics. The effects of varying terminal alkyl chains on the self-assembling properties and photovoltaic
我们描述了基于二酮吡咯并吡咯(DPP)的介晶小分子材料3,6-双5-(4-烷基苯基)噻吩-2-基} -2,5-di的合成,自组织和光伏性质具有强可见吸收特性的(2-乙基己基)-吡咯并[3,4- c ]吡咯-1,4-二酮(DPP-TP6和DPP-TP12)。研究了变化的末端烷基链对自组装性能和光伏器件性能的影响。DPP-TP6具有合适的烷基链长度与其刚性DPP核的比率,具有液晶特性并形成具有富勒烯衍生物的发达的纳米结构本体异质结(BHJ)结构(PC 71BM)。采用BHJ DPP-TP6:PC 71 BM膜的有机太阳能电池(OSC)在高开路电压为0.93 V,填充系数为0.55的情况下,显示出高达4.3%的功率转换效率。这些结果表明,液晶组织直接分子自组装是制备高性能溶液加工的小分子OSC的有前途的策略。