Poor man's green bulk heterojunction photocells: A chlorine-free solvent for poly(3-hexylthiophene)/C₆₀ composites

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• 作者：Kazuya Tada ; ^{tada@eng.u-hyogo.ac.jp} ; Mitsuyoshi Onoda
• 关键词：Conjugated polymer ; Fullerene ; Photocells
• 刊名：Solar Energy Materials and Solar Cells
• 出版年：2012
• 期刊代码：81_09270248
• 类别：ce
• 出版时间：May, 2012
• 卷：100
• 期：Complete
• 页码：246-250
• 文件大小：479 K

摘要

Although C₆₀ is unquestionably not only the cheapest but also the most energy-saving fullerene, lack of suitable solvent to make bulk heterojunction composites with it has prevented its use in photocells. Here, it is shown that a not-so-common organic solvent 1,2,4-trimethylbenzene (TMB) is useful to prepare cost-effective bulk heterojunction composites based on C₆₀. Additionally, chlorine-free TMB is expected to be environmental friendly compared with chloroaromatic solvents commonly used for the preparation of polymer/fullerene composites. A preliminary evaluation indicated that a poly(3-hexylthiophene) (P3HT)/C₆₀ bulk heterojunction photocell prepared from TMB solution shows power conversion efficiency comparable to that of a P3HT/PCBM photocell, suggesting that C₆₀ should be revisited as a promising candidate for an acceptor material in polymer bulk heterojunction composites for low-cost green photocells.