P3HT:PCBM薄膜成膜过程对聚合物太阳能电池性能的影响

P3HT:PCBM薄膜的快速和缓慢成膜过程能显著的改变异质结聚合物太阳能电池性能.通过调节旋转时间以及薄膜退火前的间隔时间,研究了P3HT:PCBM混合薄膜缓慢生长所需最佳时间.结果表明,在转速800 r·min-1下旋涂薄膜,经过50～80 s的旋涂,接着放置样品薄膜30 min以上,然后再对薄膜进行退火处理,电池效...

Influence of P3HT : PCBM film formation process on the performance of polymer solar cells

The performance of heterojunction polymer solar cells (PSCs) based on poly(3-hexylthiophene) (P3HT) and 6, 6]-phenyl C61-butyric acid methyl ester (PCBM) blends was investigated by changing P3HT : PCBM film fabrication procedures with fast growth and slow growth methods, respectively. The optimal time of slow growth of P3HT : PCBM films was gotten after we systematically changed spin-coating time and preset time before annealing blended films. When P3HT = PCBM film was spin coated at the speed of 800RPM and spin time ranged from 50 to 80 sec, and then put in petri dish for 30 min before annealing blended films, the power conversion efficiency (PCE) of PSCs reached 3%. Yet PCE of PSCs based on P3HT : PCBM with fast-growth was only 1.8%. The improved PCE is attributable to the reasonable phase-separation between P3HT and PCBM blended film, which boosted carriers transport and hop. The result indicates that half an hour of preset time for P3HT : PCBM films before annealing can efficiently finish the slow-growth of blended films, which can save time and decrease cost to fabricate efficient PSCs.