活性层优化对有机小分子太阳能电池的影响

Effect of Optimization of Active Layer on Organic Small Molecules Solar Cells

首先制备了给体(Al Pc Cl)和受体(C70)比例为1∶1的电池器件并采用不同的温度对电池进行退火处理,发现在120℃的温度下退火电池器件的性能最好,器件的转换效率从2.28%提高到2.47%,增加了8.3%。为进一步优化电池器件的性能,制备了在相同的活性层厚度下不同的给受体比例的电池器件,发现在给受体的厚度之比为1∶5时器件性能最好,电池开路电压为0.8 V,短路电流为10.21 m A/cm^2,填充因子为46.04%,转换效率为3.71%。

The device was made at the ratio of 1∶ 1 for donor( Al Pc Cl) and acceptor( C70) firstly and then was annealed at the different temperatures. It turns out that the best conversion efficiency improve 8. 3%from 2. 28% to 2. 47% when the device is annealed at 120 ℃. In order to optimize the performance of the device,the device was prepared in the same active layer thickness under different ratios of the donor and acceptor. The best conditions can be obtained with the open circuit voltage of 0. 8 V,fill factor of46. 04% and short circuit current density of 10. 21 m A · cm^(-2),and power conversion efficiency of 3.71% when the ratio of thickness for donor and acceptor is 1∶ 5.