高等学校化学学报

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (03): 555.doi: 10.3969/j.issn.0251-0790.2012.03.023

• 物理化学 • 上一篇    下一篇

电极功函数对TiO2/PbS平面异质结激子太阳电池性能影响的理论模拟

朱俊, 胡林华, 戴松元   

  1. 中国科学院新型薄膜太阳电池重点实验室, 中国科学院等离子体物理研究所, 合肥 230031
  • 收稿日期:2011-07-27 出版日期:2012-03-10 发布日期:2012-03-10
  • 通讯作者: 戴松元, 男, 博士, 研究员, 博士生导师, 主要从事新型薄膜太阳电池研究. E-mail:sydai@ipp.ac.cn,solar@ipp.ac.cn
  • 基金资助:

    国家"九七三"计划项目(批准号: 2011CBA00700)、 国家"八六三"计划项目(批准号: 2011AA050527)、 中国科学院知识创新工程重要方向项目(批准号: KGCX2-YW-326)和中国科学院合肥物质科学研究院知识创新工程青年人才领域前沿项目(批准号: 085FCQ0122)资助.

Theoretical Modeling of the Impact of Electrode Work Function on the Performance of TiO2/PbS Planar Heterojunction Excitonic Solar Cells

ZHU Jun, HU Lin-Hua, DAI Song-Yuan   

  1. Key Lab of Novel Thin Film Solar Cells, Insitute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2011-07-27 Online:2012-03-10 Published:2012-03-10

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摘要：

采用一维微光电子结构分析模型(AMPS-1D)软件模拟分析了由TiO2纳米晶薄膜与PbS量子点薄膜组成的平面异质结激子太阳电池中电极功函数对电池性能的影响. 通过在界面上引入厚度为2 nm的激子发生分离的自由载流子产生层, 得到电池的电流-电压曲线、 电子电流及空穴电流的空间分布等信息. 模拟结果表明, 透明导电氧化物电极的功函数可以在一定区间内变化而不影响电池效率, 但是金属电极功函数的变化则会明显影响电池输出性能, 这是因为PbS与金属电极之间的肖特基(Schottky)接触会对电池性能产生负面作用.

关键词: 激子太阳电池, 量子点, 微光电子结构分析, 肖特基接触

Abstract:

The impact of electrode work function on the performance of the planar heterojunction excitonic solar cells composed of TiO2 nanocrystalline films and PbS quantum dot films was theoretically modeled by means of Analysis of Microelectronic and Photonic Structures(AMPS-1D). A generation layer of 2 nm thickness where excitons dissociate and free carriers form between TiO2 layer and PbS layer was introduced into the model. I-V curves, the distribution of electron current and hole current in the thickness direction, etc, were obtained from the modeling. The modeling results show that when the work function of the transparent conductive oxide electrode changes in some degree, it exhibits almost no influence on the device performance, while the work function of the metal will significantly impact the device performance due to the negative action of the Schottky junction formed.

Key words: Excitonic solar cell, Quantum dot, Analysis of microelectronic and photonic structures, Schottky contact

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