溶剂效应对聚苯撑乙烯掺杂苝二酰亚胺太阳电池性能的影响

研究了不同溶剂对2-甲氧基-5-(2-乙基己氧基)-1，4-对苯撑乙烯(MEH-PPV): N,N′-二(1-乙基丙基)-3，4，9，10-苝四羧酸二亚酰胺(EP-PTC)复合膜的形貌及其对以MEH-PPV: EP-PTC复合膜为活性层的太阳电池性能的影响.结果表明：非芳香性溶剂不利于MEH-PPV与EP-PTC的相容，MEH-PPV与EP-PTC两相间形成微米尺寸(0.5—5 μm)的相分离，因而以MEH-PPV: EP-PTC复合膜为活性层的太阳电池中的电荷分离效率较低，进而电池的能量转换效率较低.而 关键词： 太阳电池 相分离 能量转换效率

Effect of solvent on the performance of poly(2-methoxy-5-(2-ethyl- hexyloxy)-P-phenylene vinylene):N,N'-bis(1-ethylpropyl)-3, 4,9,10-perylene bis(tetracarboxyl diimide)solar cells

The effects of different solvents on the morphology of poly(2-methoxy-5-(2-ethyl-hexyloxy)-p-phenylene vinylene) (MEH-PPV): N,N′-bis(1-ethylpropyl)-3,4,9,10-perylene bis(tetracarboxyl diimide) (EP-PTC) blend film and the performance of solar cells based on MEH-PPV: EP-PTC blend film were studied. The results show that the phase separation in the blend film using non-aromatic solvents is of micron (0.5—5 μm) size, which leads to low charge separation efficiency and consequently the low power conversion efficiency of the assembled solar cell; whereas the phase separation in the blend film using aromatic solvents is of nano-size, which increases the interface area of the two phases obviously and consequently increases the ratio of charge separation significantly. The power conversion efficiency of solar cells based on MEH-PPV: EP-PTC blend film using aromatic solvents is improved 30 times of magnitude compared with that of solar cell based on the blend film using non-aromatic solvents.