有机体异质结太阳能电池的数值模拟

J4 ›› 2015, Vol. 32 ›› Issue (3): 371-377.

有机体异质结太阳能电池的数值模拟

肖峰，袁士涛，黄志祥，吴先良

安徽大学智能计算与信号处理教育部重点实验室，合肥 230039

收稿日期:2014-08-06 修回日期:2014-08-25 出版日期:2015-05-28 发布日期:2015-05-28
通讯作者: 黄志祥(1979-)安徽人，博士，主要从事计算物理及计算电磁学研究。 E-mail:zxhuang@ahu.edu.cn
作者简介:肖峰(1993-)安徽人，主要研究半导体器件数值模拟，Email: 308226472@qq.com
基金资助:
国家自然科学基金(51277001，61471001)

Device model for operation of polymer/fullerene bulk heterojunction solar cells

XIAO Feng, YUAN Shi-Tao, HUANG Zhi-Xiang, WU Xian-Liang

Key Laboratory of Intelligent Computing and Signal processing,Anhui University, Ministry of Education,Hefei 230039,China

Received:2014-08-06 Revised:2014-08-25 Published:2015-05-28 Online:2015-05-28

摘要/Abstract

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的伏安特性的数值模型，该模型是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。这个在聚合物材料中的到很好的体现，该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。该模型证明在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%最高转换效率。

关键词: 有机太阳能电池, 体异质结, 数值模拟, 载流子, 迁移率

Abstract:

We have developed a numerical device model that consistently describes the current-voltage characteristics of polymer:fullerene bulk heterojunction solar cells. Bimolecular recombination and a temperature and fielddependent generation mechanism of free charges are incorporated. It is 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.

Key words: Polymer solar cells, bulk heterojunction, numerical simulation, free charges;mobility

中图分类号:

O441.4

肖峰，袁士涛，黄志祥，吴先良. 有机体异质结太阳能电池的数值模拟[J]. J4, 2015, 32(3): 371-377.

XIAO Feng, YUAN Shi-Tao, HUANG Zhi-Xiang, WU Xian-Liang. Device model for operation of polymer/fullerene bulk heterojunction solar cells[J]. J4, 2015, 32(3): 371-377.

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