微波退火对聚合物太阳能电池性能的提高

摘要

利用微波对基于poly(3-hexylthiophene)(P3HT)和[6,6]-phenyl-C61-buytyric acid methyl ester (PCBM)的体异质结太阳能电池进行退火处理,提高了器件的效率.使用的微波频率为2.45 GHz,当处理时间为10 min时,获得的短路电流为9.13 mA/cm2,开路电压为0.63 V,能量转化效率为3.21％,其性能参数完全可以与普通真空干燥箱退火相比拟.研究了微波对活性层的作用,从微波退火处理后的UV-Vis吸收谱和SEM图发现,微波退火主要改善了活性层的粗糙度,提高了相分离程度,有利于激子在界面处的解离和载流子的传输.%Microwave was applied to improve the efficiency of polymer solar cell based on poly (3 hexylthiophene) (P3HT) and [6, 6]-phenyl-C61-buytyric acid methyl ester (PCBM) bulk-hetero junction solar cells. With microwave radiation (2.45 GHz)' for 10 min, short circuit current of 9. 13 mA/cm2, open circuit voltage of 0. 63 V, and energy conversion efficiency of 3. 21% were ob tained, similar or surpass to those of devices annealed with a hot plate for 20 min at 150 t). We ex amined the effect of microwave on the active layer. From the Uv-Vis absorption spectrum and the SEM image after microwave, we found that more rough morphology and larger phase separation oc curred , which benefit for dissociation of exciton and transportation of carrier.