A photophysical study of PCBM thin films

被引：156

作者：

Cook, Steffan

Ohkita, Hideo

Kim, Youngkyoo

Benson-Smith, Jessica J.

Bradley, Donal D. C.

Durrant, James R.

机构：

[1] Imperial Coll London, Dept Chem, London SW7 2AZ, England

[2] Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Kyoto 6068501, Japan

[3] Imperial Coll London, Dept Phys, London SW72BW, England

[4] Kyungpook Natl Univ, Dept Chem Engn, Organ Nanoelect Lab, Taegu 702701, South Korea

来源：

CHEMICAL PHYSICS LETTERS | 2007年 / 445卷 / 4-6期

基金：

英国工程与自然科学研究理事会; 日本学术振兴会;

关键词：

D O I：

10.1016/j.cplett.2007.08.005

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The photophysical properties of [6,6]-phenyl C-61 butyric acid methyl ester (PCBM) are found to differ depending on its concentration in thin films. A film of dispersed PCBM molecules in polystyrene (PS) showed only weak absorption in the visible region (400-700 nm) with a single S-1 -> S-0 emission band at around 700 nm. By comparison, a film of pristine PCBM showed heightened absorption in the visible region and the presence of an additional higher energy emission at similar to 500 nm assigned to the presence of charge transfer (CT) transitions in crystalline PCBM. The energy of the CT exciton is estimated to be similar to 2.8 eV. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：276 / 280

页数：5

共 27 条

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