中文摘要：

引入了一种可以直观展现出聚合物体异质结太阳能电池伏安特性的数值模型,该模型主要研究由双分子复合以及温度和电场效应下自由载流子产生的机制。该机理在聚合物材料中得到很好的体现,材料中空间电荷效应只起到微弱的作用,从而在模型中形成相对恒定的电场。此外,在短路条件下只有7%的自由载流子由于双分子复合而消失。理论模型及结果表明在PPV/PCBM太阳能电池中随着空穴迁移率的增加和减少受体0.5电子伏特将得到5.5%的最高转换效率。

英文摘要：

A numerical device model was introduced that consistently describes the current-voltage charac- teristics of polymer/fullerene bulk heterojunction solar cells. Bimolecular recombination and temperature and field dependent generation mechanism of free charges were also presented. It was demonstrated that in poly based solar cells space-charge effects only play a minor role, leading to a relatively constant electric field in the device. Furthermore, at short-circuit conditions only 7% of all free carriers are lost due to bimolecular recombination. The model predicts that an increased hole mobility together with a reduction of the acceptor strength of 0.5 eV will lead to a maximum attainable efficiency of 5.5% in the PPV/PCBM-based solar cells.