Interface formation between poly(9,9-dioctylfluorene) and Ca electrode investigated using photoelectron spectroscopy

被引：29

作者：

Liao, LS

Cheng, LF

Fung, MK

Lee, CS

Lee, ST ^{[1
]}

Inbasekaran, M

Woo, EP

Wu, WW

机构：

[1] City Univ Hong Kong, COSDAF, Hong Kong, Hong Kong, Peoples R China

[2] City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China

[3] Fudan Univ, Surface Phys Lab, Shanghai 200433, Peoples R China

[4] Dow Chem Co, Corp R&D, Midland, MI 48674 USA

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 325卷 / 04期

关键词：

D O I：

10.1016/S0009-2614(00)00722-3

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：

Ultraviolet photoelectron spectroscopy and X-ray photoelectron spectroscopy (XPS) have been used to study the interface formation between poly(9,9-dioctylfluorene) (PFO) and Ca electrode. As the Ca coverage increases, the vacuum energy level of PFO decreases gradually in order to match the Fermi level (E-F) of Ca. The original highest occupied molecular orbital of PFO moves away from the E-F, and vanishes eventually. Bipolaron states with 1.8 eV in peak interval are formed in the former energy gap. The original lowest occupied molecular orbitals of PFO are broadened resulting in a featureless shake-up in the XPS Cls core level. (C) 2000 Published by Elsevier Science B.V.

引用

页码：405 / 410

页数：6

共 24 条

[1] Direct determination of the exciton binding energy of conjugated polymers using a scanning tunneling microscope [J].