一种三维四面体星型共轭小分子用于有机太阳能电池（英文）

A three-dimensional tetrahedral-shaped conjugated small molecule for organic solar cells

合成了一种由四苯基硅烷为中心和氰基脂功能化三联噻吩为支链构成的新型三维四面体星型小分子SO.循环伏安曲线测得这种小分子拥有很低的HOMO能级(-5.3 eV)和较窄的能带(1.9 eV).吸收光谱,X射线散射和差示扫描量热法实验都显示这种化合物拥有很高的结晶度.制作和测试了基于SO分子的太阳能电池.光学显微镜实验证实相对低的光电转化效率主要是由于没有形成很好的相分离.

We report the synthesis of a novel three-dimensional tetrahedral-shaped small molecule,SO,containing a tetraphenylsilane core and cyanoester functionalized terthiophene arms. A deep lying HOMO energy level of-5. 3 eV and a narrow bandgap of 1. 9 eV were obtained from cyclic voltammetry measurements. Absorption,X-ray scattering and differential scanning calorimetry experiments all indicate high crystallinity of this compound. Solar cells employing SO were fabricated and evaluated. The relatively low performance was mainly ascribed to lack of appreciable phase separation,which is confirmed by optical microscopy.