聚3-己基噻吩/ZnO微纳米球复合膜的形貌和光学性能

Morphology and Optical Properties of Poly(3-hexylthiophene)and ZnO Micro/Nanospheres Composite Films

对ZnO微纳米球从分散性和能级匹配方面进行了受体可行性研究,分析了能级结构和光电性能之间的关系;并将聚-3己基噻吩(P3HT)与ZnO微纳米球共混和旋涂制备P3HT/ZnO复合膜,考察P3HT和ZnO的共混质量比和退火温度对复合膜微观形貌及光学性能的影响。结果说明,P3HT/ZnO微纳米球复合膜与纯ZnO薄膜相比,拓宽了紫外吸收范围,增强了对太阳光的吸收,说明复合膜的吸收光谱与太阳光谱能够较好的匹配;在120℃退火处理后增强了P3HT的有序性,改善了复合膜的结晶性,有利于电池效率的提高。当P3HT质量浓度为6mg/mL、旋涂转速为1 500r/min时,优质复合膜的制备参数为:P3HT和ZnO微纳米球共混质量比为1∶2,退火温度120℃。优质复合膜大大拓宽了紫外吸收范围,增强了对太阳光的吸收。

In this paper, the feasibility of ZnO micro/nanospheres as the electron acceptors was firstly studied through exploring their dispersion in organic solvents and energy level matching with poly（3-hexylthiophene） （P3HT）. The relationship between energy level structure of ZnO micro/nanospheres and photoelectric performance was investigated. Then,P3HT/ZnO composite films were prepared by blending and spin-coating method, in which the influences of blending mass ratio and annealing temperature on the morphology and optical performances of composite films were discussed. The results show that P3HT/ZnO micro/nanospheres composite film, compared with pure ZnO film, had broader ultraviolet absorption range, stronger adsorption of sunlight, suggesting that the absorption spectra had good match with the solar spectra. The order of P3HT was enhanced by annealing treatment. Thus the crystallization of the composite film was improved, which would enhance the efficiency of the hybrid solar cells. The optimal preparation of composite films was spin-coating with mass ratio of 1：2 and 120℃ annealing treatment for 10 min under 1 500 rpm with 6 mg/mL P3HT.