High Open-Circuit Voltage of Organic Bulk Heterojunction Solar Cells Base on Poly(3-hexylthiophene): Fullerene Derivatives

摘要

Here, we report the fabrication of high efficiency poly (3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) and [6,6 ]-diphenyl-C_(62)-bis( butyric acid methyl ester) (bis-PCBM) blended photovoltaic cells. Bulk heterojunction photovoltaic cells with an ITO/G-PH/P3HT.PCBM (or bis-PCBM)/ TiO_x/Al configuration were fabricated, and the device using P3HT:bis-PCBM (1:0.7) showed the best performance compared with those using P3HT.PCBM (1:0.7). A maximum power conversion efficiency (PCE) of 4.50% ( V_(OC) = 0.64 V, FF=0.62) was achieved with P3HT:bis-PCBM (1:0.7).