【摘要】 采用聚[2-甲氧基-5-(2-乙基己氧基)对苯乙撑](MEH-PPV)以及ZnO量子点(ZnO-QDs)制备了共混的聚合物太阳电池。利用稳态电流-电压测试,结合荧光光谱,研究了ZnO-QDs的含量对电池性能的影响。实验发现电池的性能与ZnO-QDs的含量有密切的关系。随着ZnO-QDs含量的增加,电池的开路电压因为并联电阻的增加而减小,而短路电流呈现先增加后减小的趋势,这是由于ZnO-QDs含量的增加会对电流产生两个相互竞争的影响,一方面,增加的界面面积会提高短路电流,另一方面,团聚现象逐渐严重以及串联电阻的增加会降低短路电流。光伏性能最优化电池的Zno-QD含量是88wt%,此时薄膜厚度约240 nm,在15.8 mW/cm2光照射下的光电转换效率达到0.24%。更多还原

【Abstract】 The device performance of poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene)(MEH-PPV)/ZnO quantum dots(ZnO-QDs) were studied by steady-state current-voltage measurements,UV-vis absorption and photoluminescence spectroscopy.The results show that the performance was strongly dependent on the content of ZnO-QDs.Increasing the content of ZnO-QDs results in a decreased open circuit voltage due to the increased shunt resistance.And the content of ZnOQDs imposes two competitive effects to influence the short circuit current density,to enhance it by increasing the donor/acceptor interfacial area but to reduce it by promoting the glomeration and series resistance.The optimized content of ZnO-QDs is about 88wt% with ca.240 nm film thickness,offering a peak conversion efficiency of 0.24% under 15.8 mW/cm2illumination.更多还原