摘要
针对CuPc-PTCDA有机小分子太阳电池,根据光学干涉效应和扩散理论,建立了非相干光吸收模型和激子传输模型,利用Matlab软件模拟了限制有机光伏效率的光吸收和激子扩散过程,模拟了不同激子扩散长度下CuPc层内激子浓度分布,由此得到了光电流密度和外量子效率与CuPc层膜厚的关系;模拟得到了外量子效率与PTCDA、CuPc各层膜厚的关系,进而优化有机层的结构,以此达到了提高器件光伏效率的目的。
A model of the incoherent optical absorption and exciton transport was established based on the optical interference effect and diffusion theory for CuPe/PTCDA organic small molecules solar cells. The optical absorption and exeiton diffusion process which limit the photovoltaic efficiency were simulated by Matlab software and the exciton distribution in CuPc layer with different exciton diffusion length were simulated. The relations of the optical current and external quantum efficiency with the thickness of CuPc layer were obtained. And the relations of the external quantum efficiency with the thickness of PTCDA layer were simulated. By optimizing the structure of organic active layer, the photovoltaic efficiency of solar cells is improved.
出处
《半导体光电》
CAS
CSCD
北大核心
2011年第4期469-473,共5页
Semiconductor Optoelectronics
基金
西北工业大学基础研究基金项目(JC200820)
西北工业大学研究生创业种子基金项目(Z2011020)
关键词
有机太阳电池
薄膜厚度
模拟
激子扩散
organic solar cells
film thickness
simulation
exciton diffusion
