Molecular arrangement investigation of copper phthalocyanine grown on hydrogen passivated Si(111) surfaces

被引：10
|
作者：
Arbi, I. [1 ]
Ben Hamada, B. [1 ]
Souissi, A. [1 ]
Menzli, S. [1 ]
Ben Azzouz, C. [1 ]
Laribi, A. [1 ]
Akremi, A. [1 ]
Chefi, C. [1 ]
机构：
[1] Univ Carthage, Fac Sci Bizerte, Unite Serv Commun Spectrometre Surfaces, Lab Phys Mat, Jarzouna 7021, Bizerte, Tunisia
来源：
APPLIED SURFACE SCIENCE | 2014年 / 305卷
关键词：
Copper-phthalocyanine; Hydrogen passivated Si(111) surfaces; ELECTRONIC-STRUCTURE; THIN-FILMS; SI(100); SPECTROSCOPY; INTERFACE; ENERGY; XPS;
D O I：
10.1016/j.apsusc.2014.03.100
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：
Chemical, electronic and structural properties of ultra thin films of copper phthalocyanine (CuPc) grown on hydrogen passivated silicon (1 1 1) surfaces were investigated in situ by X-ray photoelectron spectroscopy (XPS), ultraviolet photoemission spectroscopy (UPS), X-ray photoelectron diffraction (XPD) and electron diffraction (LEED). The early stages of copper phthalocyanine adsorption (1-2) were characterized by the saturation of surface defects and by a flat lying disposition on the surface. Upon further CuPc coverage, the passivation of Si surfaces resulted in the molecule taking a standing position in films. The molecular packing deduced from these studies appears very close to the one in the bulk ce. phase of CuPc. The work function of the films was found to be decreasing during the growth and was correlated with the molecular orientation. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：396 / 401
页数：6
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