PEDOT∶PSS掺杂对聚合物太阳电池性能的影响

Effects of PEDOT∶ PSS Doping on Performance of Polymer Solar Cells

分别用不同体积分数的二甲基亚砜(DMSO)和丙三醇溶液作为掺杂剂优化PEDOT∶PSS薄膜,并对DMSO和丙三醇掺杂PEDOT∶PSS薄膜的影响进行了研究。此外,还对优化处理过的薄膜分别作为阳极修饰层的聚合物太阳电池进行对比。结果表明,掺杂过的PEDOT∶PSS薄膜的电导率得到了很大提高。PEDOT∶PSS薄膜的光学性质和表面粗糙度变化等表明DMSO掺杂的PEDOT∶PSS薄膜电导率的提高是因为PEDOT∶PSS相分离变小,使得两相区势垒降低;而丙三醇掺杂的PEDOT∶PSS薄膜电导率的提高是因为PEDOT∶PSS链结构的变化。器件的能量转换效率都是在掺杂3%DMSO和3%丙三醇时获得,分别为3.79%和2.70%,比未掺杂的电池分别提高了5.65倍和4.02倍。

The PEDOT∶ PSS films were optimized using various volumes of dimethyl sulfoxide（DMSO）and glycerol solution as dopants,respectively. The effects of DMSO and glycerol in PEDOT∶ PSS films were investigated. Besides,PSCs used the optimized PEDOT∶ PSS films as anode buffer layer had been researched. The results show that the conductivity of the doped PEDOT ∶ PSS films improve obviously.The changes of optic property and surface roughness indicate that the increase of conductivity of DMSOdoped PEDOT∶ PSS films is related to the decreased size of PEDOT ∶ PSS phase separation; while the increase of conductivity of glycerol-doped PEDOT ∶ PSS films results from the PEDOT ∶ PSS chain conformational change. The highest PCE values of 3. 79% and 2. 70% were obtained using 3% DMSOdoped PEDOT ∶ PSS and 3% glycerol-doped PEDOT ∶ PSS as anode buffer layer respectively,which increased 5. 65 times and 4. 02 times compared with the undoped cell.