Synthesis and Structure-Property Correlations of Dicyanovinyl-Substituted Oligoselenophenes and their Application in Organic Solar Cells
作者:Stefan Haid、Amaresh Mishra、Matthias Weil、Christian Uhrich、Martin Pfeiffer、Peter Bäuerle
DOI:10.1002/adfm.201201018
日期:2012.10.23
are used as donor materials in planar heterojunction (PHJ) and bulk‐heterojunction (BHJ) organic solar cells. The devices show very high fill factors (FF), a high open circuit voltage, and power conversion efficiencies (PCE) of up to 3.4% in PHJ solar cells and slightly reduced PCEs of up to 2.6% in BHJ solar cells. In PHJ devices, the PCE for DCV4S almost doubles compared to the PCE reported for the
提出了一系列受体-供体-受体(A-D-A)型双麦甲酰基(DCV)取代的寡硒苯酚DCV n S(n = 3-5)的收敛合成。根据共轭骨架的长度,研究了热和光电子性能的趋势。光学测量揭示了红移的吸收光谱,电化学研究表明,与相应的噻吩类似物DCV n相比,DCV n S的最低未占据分子轨道(LUMO)能级降低了T.结果,观察到带隙的降低。四聚体DCV4S的单晶X射线结构分析提供了分子的堆积特征和分子间相互作用的重要见解,进一步证实了DCV受体基团对于分子有序的重要性。DCV4S和DCV5S在平面异质结(PHJ)和体异质结(BHJ)有机太阳能电池中用作施主材料。这些器件在PHJ太阳能电池中显示出非常高的填充因子(FF),高开路电压和高达3.4%的功率转换效率(PCE),而在BHJ太阳能电池中则略微降低了高达2.6%的PCE。在PHJ器件中,用于DCV4S的PCE与报告的低聚噻吩模拟DCV4T的PC