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Published on: September 28, 2016
Synthesis of neutral Li-endohedral PCBM: an n-dopant for fullerene derivatives
Hiroshi Ueno1,2, Daiki Kitabatake1, Hao-Sheng Lin3
1Creative Interdisciplinary Research Division, The Frontier Research Institute for Interdisciplinary Sciences (FRIS), Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan. hiroshi.ueno.d5@tohoku.ac.jp.
Abstract:
Li@PCBM, the first neutral Li@C60 derivative, was synthesized. The Li@PCBM exists in a monomer-dimer equilibrium in solution but as a monomer in the PCBM matrix. The fully dispersed Li@PCBM n-doped the surrounding empty PCBM, raising the Fermi level by 0.13 eV compared with the undoped PCBM film. The hybrid films were utilized as an ETL for PSCs, promoting the efficiency of the device.
