Ultraviolet photoelectron spectroscopy and inverse photoemission spectroscopy of [6,6]-phenyl-C61-butyric acid methyl ester in gas and solid phases

被引：104

作者：

Akaike, Kouki ^{[1
]}

Kanai, Kaname ^{[2
]}

Yoshida, Hiroyuki ^{[3
]}

Tsutsumi, Jun'ya ^{[3
]}

Nishi, Toshio ^{[1
]}

Sato, Naoki ^{[3
]}

Ouchi, Yukio ^{[1
]}

Seki, Kazuhiko ^{[1
]}

机构：

[1] Nagoya Univ, Grad Sch Sci, Dept Chem, Chikusa Ku, Nagoya, Aichi 4648602, Japan

[2] Nagoya Univ, Res Ctr Mat Sci, Chikusa Ku, Nagoya, Aichi 4648602, Japan

[3] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 104卷 / 02期

基金：

日本学术振兴会; 日本科学技术振兴机构;

关键词：

D O I：

10.1063/1.2957588

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The electronic structure of [6,6]-phenyl-C-61-butyric acid methyl ester (PCBM) was studied using ultraviolet photoelectron spectroscopy of vapor and thin film and inverse photoemission spectroscopy of thin film. The threshold ionization energy of PCBM was found to be 7.17 +/- 0.04 eV in gas phase and 5.96 +/- 0.02 eV in solid phase. The threshold electron affinity was 3.9 +/- 0.1 eV in solid phase. These values are 0.4-0.6 eV smaller than C-60. The density functional theory calculations gave consistent results with these trends and suggested that the electron donation from the side chain to C-60 backbone raised the C-60-backbone-derived pi orbitals of PCBM. The polarization energy of PCBM is 1.21 eV, which is almost the same as C-60 but is about 0.5 eV smaller than the value of typical aromatic hydrocarbons. (c) 2008 American Institute of Physics.

引用

页数：5

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