阴极缓冲层对有机太阳能器件性能的影响

Effects of cathode buffer layers on performance of organic photovoltaic devices

分别选用LiF、8羟基喹啉铝(Alq_3)和浴铜灵(BCP)作为阴极缓冲层,制备结构为氧化铟锡(ITO)/酞菁铜(CuPc)/富勒烯(C_(60))/阴极缓冲层/Al的异质结有机太阳能电池,并研究有无缓冲层对器件性能的影响。结果表明:引入缓冲层后,器件的开路电压和短路电流密度及填充因子均有很大的提高。缓冲层的厚度对器件的性能影响很大,通过优化缓冲层厚度,以LiF、Alq_3和BCP为缓冲层的器件的能量转换效率相比没有缓冲层时分别提高了374%、362%和1086%。

LiF, aluminum 8-hydroxyquinolinate （ Alq3 ） and cupper phthalocyanine （ BCP ） were used as cathode buffer layers in the heterojunction organic photovohaic devices based on indium tin oxide（ ITO）/ copper phthalocyanine （CuPc）/fullerene （C60）/cathode buffer layer/A1 structure, and their effects on the performance of the devices were investigated. Results showed that devices with the cathode buffer layer improved the open-circuit voltage, short-circuit current density and fill factor. The devices performance depended on the thickness of buffer layers. Under the condition of optimized thickness of buffer layers, the power conversion efficiency of devices with LiF, Alq3 and BCP as cathode buffer layers could be improved by 37.4%,36. 2% and 108.6%,respectively, compared with the devices without buffer layers.