苝二酰亚胺/聚噻吩复合膜的光电性能研究

在有机光电材料领域，光稳定性好、光谱吸收范围宽、光电转换效率高的材料是研究工作者不断追求的目标．近年来，导电聚合物研究的不断进展使得开发低成本太阳电池成为可能．共轭导电高分子材料由于在一定程度上同时具有聚合物的柔韧性和可加工性、以及无机半导体特性或金属导电性，因而具有巨大的潜在商业应用价值．

PHOTOELECTRIC PROPERTIES OF PHT/PDI COMPOSITE FILMS

Photovoltaic properties of blend composites, composed of N,N′ didodecy1 3,4,9,10 perylene biscarboximide (PDI) and a soluble conductive polymer poly(3 hexylthiophene) (PHT), are reported. PDI can form the interpenetrating network structure with PHT chains, as evidenced in the UV Vis spectrum. The investigation of the photoluminescence (PL) spectra revealed that PL of PHT was quenched when it was blended with PDI. The photovoltaic devices using PHT as both the sensitizer and hole conductor, and PDI films as the electron conductor were prepared to estimate the photovoltaic performance of the blend films. An improvement of conversion efficiency in the blending cells compared with that of the pure PHT cells was observed. Spectral properties and current voltage( I\|V) characteristics of the PHT/PDI composite films showed that the perylene diimide dopant can improve the photovoltaic performance of PHT films significantly through the increase of visible light absorption, exciton dissociation, diffusion and transportation.