Electronic structure of hybrid interfaces of poly(9,9-dioctylfluorene)

被引:40
作者
Greczynski, G [1 ]
Fahlman, M [1 ]
Salaneck, WR [1 ]
机构
[1] Linkoping Univ, Dept Phys, S-58183 Linkoping, Sweden
关键词
D O I
10.1016/S0009-2614(00)00338-9
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
In this Letter we report the results of a study of the energy level alignment at interfaces between ultra-thin films of poly(9,9-dioctylfluorene) and AlxOy SiO2 or gold substrates, prepared under ambient (air) conditions. In all the cases, vacuum level alignment occurs, and the work function tracks that of the substrates. There is no evidence of band bending in the pristine polymer layers up to 1100 Angstrom in film thickness. Upon increasing the electrical conductivity of the polymer films by continuous doping with sodium under ultra-high-vacuum conditions, the energy levels of the polymer film gradually shift towards higher binding energies and finally become substrate independent. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:379 / 384
页数:6
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