基于复合量子点界面修饰的杂化太阳能电池研究  

Hybrid Solar Cells Based on Interfacial Modifiers of Composite Quantum Dots

作　　者：周露露[1,2] 汪竞阳[2] 屈少华[2] 罗中杰[1] 

机构地区：[1]中国地质大学(武汉)数学与物理学院,湖北武汉430074 [2]湖北文理学院物理与电子工程学院,湖北襄阳441053

出　　处：《湖北文理学院学报》2016年第2期32-36,共5页Journal of Hubei University of Arts and Science

基　　金：国家自然科学基金项目(51302075);低维光电材料与器件湖北省重点实验室开放课题(HLOM141004)

摘　　要：利用连续离子层吸附与反应法,在透明TiO_2纳米晶薄膜表面制备出CdSe/CdS复合量子点,并组装了基于复合量子点界面修饰的P3HT/CdSe/CdS/TiO_2杂化太阳能电池.通过XRD、SEM-EDX、紫外可见分光光度计、模拟太阳光光电性能测试系统和电化学阻抗谱等手段对量子点敏化TiO_2薄膜的形貌结构成分及电池的光电性能进行表征分析.结果表明,CdSe/CdS复合量子点作为界面修饰材料可拓展杂化电池的吸收范围和吸收强度,增大给体/受体界面复合电阻,降低载流子复合几率,从而大幅提高光电转换效率,相比纯P3HT/TiO_2杂化电池的效率提高了6倍.A hybrid solar cell was developed using a P3HT/CdSe/CdS/TiO2 stepwise structure which modified by composite quantum dots and CdSe/CdS quantum dots were deposited on the surface of transparent TiO2 nanocrystalline films by successive ionic layer adsorption and reaction. The morphology, microstructure, component of quantum dots co-sensitized TiO2 thin film and photoelectric performance of cells were characterized by XRD, SEM-EDX, UV-vis spectrophotometer, simulated sunlight photoelectric performance testing system and electrochemical impedance spectroscopy. The results show that composite CdSe/CdS quantum dots as interfacial modifiers not only can enhance the range and intensity of light harvesting but also increase the interfacial recombination resistance at the donor/accepter interfaces and lead to a lower recombination rate of the carrier, therefore, photoelectric conversion efficiency improved greatly, which is more than 6 times higher than that of pure P3HT/TiO2 hybrid solar cell.

关 键 词：复合量子点 连续离子层吸附与反应法 杂化太阳能电池 光电性能 

分 类 号：TB332[一般工业技术—材料科学与工程]