Methanofullerenes, C60(CH2)n (n = 1, 2, 3), as Building
Blocks for High‑Performance Acceptors Used in Organic Solar
Cells

He, Dan; Du, Xiaoyan; Xiao, Zuo; Ding, Liming

doi:10.1021/ol4035275.s001

ol4035275_si_001.pdf (3.8 MB)

Methanofullerenes, C₆₀(CH₂)_n (n = 1, 2, 3), as Building Blocks for High‑Performance Acceptors Used in Organic Solar Cells

journal contribution

posted on 2014-01-17, 00:00 authored by Dan He, Xiaoyan Du, Zuo Xiao, Liming Ding

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% (V_oc = 0.95 V, J_sc = 9.67 mA cm^–2, FF = 70%) in fullerene:P3HT solar cells since the small CH₂ addends lift up fullerene LUMO and increase V_oc significantly without decreasing mobility significantly.