title: Methanofullerenes, C60(CH2)n (n = 1, 2, 3), as building blocks for high-performance acceptors used in organic solar cells.
abstract: Selective preparation of C60(CH2)n (n = 1, 2, 3) was realized via a "Bingel-decarboxylation" route. A 54π-electron derivative of C60(CH2)2, OQBMF, demonstrates an outstanding power conversion efficiency (PCE) of 6.43% (Voc = 0.95 V, Jsc = 9.67 mA cm(-2), FF = 70%) in fullerene:P3HT solar cells since the small CH2 addends lift up fullerene LUMO and increase Voc significantly without decreasing mobility significantly.
authors.affiliation: National Center for Nanoscience and Technology, Beijing 100190, China.
authors.forename: Dan
authors.initials: D
authors.lastname: He
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Du
authors.forename: Zuo
authors.initials: Z
authors.lastname: Xiao
authors.forename: Liming
authors.initials: L
authors.lastname: Ding