Stability Improvement of Polymer Based Solar Cells by Thermally Evaporated Or_2O_3 Interfacial Layer

摘要

We report on Gr_2O_3 layer by thermal evaporation of Gr_2O_3 powder as cathode interfacial layer to improve the stability in air for the bulk heterojunction solar cells of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C_(61) butyric acid methyl ester (PCBM). Devices with Gr_2O_3 interfacial layers show higher power conversion efficiency (PCE) and stability than those without interfacial layer. Devices with Gr_2O_3 show improved stability approximately 100 times than that of devices without interfacial layer or with LiF interfacial layer.