阴极缓冲层PVP的插入对聚合物太阳能电池性能的影响

Effect of Cathode Buffer Layer PVP on the Performance of Polymer Solar Cell

研究了聚乙烯吡络烷酮(PVP)作为阴极缓冲层对P3HT/PCBM基聚合物太阳能电池光电性能的影响。PVP分别溶于二甲基乙酰胺(DMAC)、N-甲基吡咯烷酮(NMP)、乙二醇乙醚、丙酮等不同溶剂中,研究了其旋涂过程及其对活性层薄膜的影响。结果表明:PVP作为P3HT∶PCBM的阴极缓冲层,由于其产生的自集聚效应使活性层与阴极之间形成良好的欧姆接触,有利于电子的传输。当在活性层上面旋涂溶于N-甲基吡咯烷酮(NMP)的聚乙烯吡络烷酮(PVP)的溶液时,聚合物太阳能电池的开路电压VOC为0.57 V,短路电流为Jsc为10.9 mA/cm2,填充因子FF为62%,能量转换效率PCE为3.95%。与未加阴极缓冲层PVP的标准电池器件效率(2.62%)相比,效率提高了50%。

The effect of polyvinylpyrrolidone（ PVP） inserted as the cathode buffer layer on the photoelectric performance of polymer solar cells based on P3 HT /PCBM was studied.The PVP was dissolved in Dirnethylacetarnide（ DMAC）,1-Methy-2-ethoxyethanol（ NMP）,2-ethoxyethanol,Aletone,respectively.Process of spin-coating and the influences of PVP in different solvents for the performances of solar cells were investigated.The results show that for the device using PVP as the cathode buffer layer,there is a good ohmic contact between the active layer and cathode that benefiting the electronic transport.When the solution of polyethylene pyrazole collaterals alkane ketone（ PVP） dissolved Nmethyl pyrrolidone（ NMP） was spined on active layer,the sollar cell features an open circuit voltage of 0.57 V,short circuit current density of 10.9 mA /cm^2,fill fact of 62%,and power conversion efficiency of 3.95% was abtained.Compared to the PCE（ 2.62%） of standard cell device that without cathode buffer layer PVP,it enhances by 50%.