高效率有机太阳电池的理论建模

Theoretical Modeling of High Efficiency Organic Solar Cells

摘要:

采用综合考虑温度、电场强度、载流子浓度的普遍迁移率模型,利用实际太阳能光谱和非富勒烯材料的吸收系数来计算载流子的产生,结合漂移扩散方程、电流连续性方程等对高效率有机太阳电池进行理论建模。利用该模型计算了器件的电流-电压曲线、开路电压-光照强度曲线和短路电流-光照强度曲线。结果发现,利用该模型计算的电流-电压曲线与实验数据符合很好,其他两种曲线也与实验数据符合较好。此外,利用该模型分析了能量无序度对器件性能的影响,结果表明减小材料的能量无序度可以提高有机太阳电池的性能。

Abstract:

A general mobility model that comprehensively considered the temperature, electric field strength and carrier concentration was adopted. The generation of carriers was calculated by using the actual solar spectrum and the absorption coefficient of non-fullerene materials. In combination with the drift diffusion equation and the current continuity equation, the theoretical modeling of high-efficiency organic solar cells was carried out. The current voltage curve, open circuit voltage light intensity curve and short circuit current light intensity curve of the device were calculated using this model. The results show that the current voltage curves calculated by the model are in good agreement with the experimental data, and the other two curves are also in good agreement with the experimental data. In addition, the effect of energy disorder on the device performance was analyzed by using this model. The results show that reducing the energy disorder of materials can improve the performance of organic solar cells.