科研之友
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摘要
High device performance is demonstrated in air-processed polymer solar cells made from an active layer of poly(3-hexylthiophene) and [6,6]-phenyl-C-61-butyric acid methyl ester, with optimized efficiency and fill factor as high as 4.71% and 0.71, respectively. The degree of self-organization of the active layer can be varied by controlling the solvent evaporation rate at different room temperature (298-292 K). Device performance improvement originates from an increased absorption and increased charge-carrier mobility in the active layer. This free-annealing process compatible with flexible substrates contributes to a flexible cell with an efficiency of 4.06%.
