【摘要】 根据电子在半导体中的扩散理论,建立了模拟染料敏化太阳电池(DSSC)J-V输出特性的数学模型。研究表明,随着光电极厚度(d)的增大,开路电压(VOC)下降;短路电流密度(JSC)先迅速增大,后缓慢减小;最大功率输出值MPP则先迅速增大,再迅速减小,表明d对DSSC光电转化效率影响显著。对DSSC的各参数进行了分析,发现操作参数,如光强、温度,对最佳电极厚度的确定没有影响,而物性参数,如光吸收系数、电子扩散系数及电子生命则决定了DSSC光电极厚度的大小。将模型结果与文献实验结果进行了对比,两者符合良好,说明模型结果可靠,可以为DSSC的优化设计提供理论依据。更多还原

【Abstract】 Based on semiconductor electron diffusion theory, a mathematical model was developed to simulate the effect of photoelectrode thickness (d ) on dye-sensitized solar cell (DSSC) J-V characteristics. It was found that with an increase in d, the open-circuit voltage (VOC) decreased; the short-circuit current density (JSC) increased quickly and then decreased slowly after reaching the maximum value; while the maximum power point (MPP) increased quickly and then decreased rapidly, indicating the apparent affect of d on DSSC energy conversion efficiency. Parametrical analyses were performed. It was found that the operational parameters, such as light intensity and operating temperature, have negligible effect on the selection of the optimal electrode thickness; while material parameters, such as light absorption coefficient, electron diffusion coefficient and electron lifetime, determined the value of the optimal electrode thickness. The modeling results were compared with experimental data from literature and a good agreement was found, thus verified the theoretical model. The model can serve as the theoretical basis for DSSC optimization design.更多还原