材料带隙和阴极功函数对有机太阳能电池开路电压的分析

The Theoretical Analysis on the Effect of the Band Gap and Cathode Work Function on the Open Circuit Voltage of Organic Solar Cell

利用AMPS-1D软件研究了材料带隙和阴极功函数对异质结有机太阳电池的开路电压的影响.仿真实验结果表明:有机太阳电池的开路电压和材料带隙满足线性关系;活性层材料的带隙一定时,开路电压随阴极功函数的增大而减小,同时开路电压随温度的升高而减小,并呈现一次指数衰减的趋势;活性层内部载流子的复合率随阴极功函数的增大而增大,进而导致器件内部电场强度的减小.

AMPS-1 D software was used to study the effect of the band gaps and the cathode material work function on the open circuit voltage of heterojunction organic solar cells. The simulation results were showed that they were linear relationship between the open circuit voltage and band gap. When the band gap of the active layer materials was fixed,the open circuit voltage was decreased with the increasing of the cathode work function and temperature which was presented an exponential decay trend. The internal carriers recombination rate of active layer was in-creased with the increasing of the cathode work function,which was resulted in the decreasing of the internal electric field intensity of device.