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.
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