中文摘要：

采用聚氧化乙烯（PEO）作为聚合物太阳能电池的阴极修饰层,以P3HT：PCBM为活性层制备了聚合物本体异质结太阳能电池。考察了PEO的厚度对器件光伏性能及稳定性的影响。比较了加入PEO修饰层前后器件的稳定性,研究了采用PEO修饰层前后器件电阻的差异。结果表明：加入PEO作为阴极修饰层后器件的光电性能（JSC,VOC,FF,PCE）均有明显提高,而器件的串联电阻Rs则有了明显降低。没有阴极修饰层的器件的初始光电转换效率为1.92%,90 h后衰减为初始值的5%;而加入PEO修饰层后初始光电转换效率为3.36%,90 h后仅衰减为初始值的20%,光电转换效率提高了75%,稳定性提高了3倍。

英文摘要：

Polymer bulk-heterojunction solar cells with poly（ethylene oxide）（PEO） as cathode interfacial layer,and P3HT：PCBM as active layer are prepared.The effect of the PEO layer′s thickness on the performance of polymer solar cells and the degradation characteristics of this system are investigated.The stabilities of the device with PEO interfacial layer and the control device are copared.The differences of the resistances between the device with PEO interfacial layer and the control device are studied.The results indicate that the performance of polymer solar cells enhanced evidently,but the series resistance of the decice reduced obviously.The power conversion efficiency（PCE） of the device with PEO interfacial layer is 3.36%,and then decreases to 20% of the initial value after 90 h.Compared with the control device（PCE is 1.92%,decreased to 5% of the initial value after 90 h）,the power conversion efficiency of the device with PEO interfacial layer increased by 75% and the stability extended 3 times.