| 简介 |
PROBLEM TO BE SOLVED : To provide a new fullerene derivative soluble in an organic solvent, forming a uniform film by itself, having a proper crystallization temperature, and in particular, capable of contributing to improvement in a conversion efficiency when applied to an organic solar cell.SOLUTION : A fullerene derivative is represented by formula (1). (In the formula, R-Rare each independently a hydrogen atom, a fluorine atom, a sugar group or a substituted sugar group wherein an optional hydroxy group is substituted with a substituent, Ris a 1-5C alkyl group, at least one of R-Ris the sugar group or substituted sugar group, and at least one of R-Ris a fluorine atom). |
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