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

doi:10.3969/j.issn.0251-0790.2012.03.023

Abstract

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

CLC Number:

O649

TrendMD:

ZHU Jun, HU Lin-Hua, DAI Song-Yuan. Theoretical Modeling of the Impact of Electrode Work Function on the Performance of TiO₂/PbS Planar Heterojunction Excitonic Solar Cells[J]. Chem. J. Chinese Universities, 2012, 33(03): 555.

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

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