Energy level alignment between sexithiophene and buckminsterfullerene films

被引：27

作者：

Ge, Yan

Whitten, James E.

机构：

[1] Univ Massachusetts Lowell, Dept Chem, Lowell, MA 01854 USA

[2] Univ Massachusetts Lowell, Ctr Adv Mat, Lowell, MA 01854 USA

来源：

CHEMICAL PHYSICS LETTERS | 2007年 / 448卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2007.09.075

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 has been used to investigate the interface between thermally deposited alpha-sexithiophene (6T) and buckminsterfullerene (C60) films on gold surfaces. Charge transfer from 6T to C60 is evidenced by shifts in the interfacial C60 (6T) highest occupied molecular orbitals toward lower (higher) ionization energies. The absence of vacuum level alignment with an offset of 0.6 eV +/- 0.05 eV is observed, independent of the order of deposition. The vacuum level offset matches the difference in work functions between the C60/Au and 6T/Au surfaces, indicating that the vacuum levels of the organic layers remain pinned to the Fermi level. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：65 / 69

页数：5

共 32 条

[11] Examination of band bending at buckminsterfullerene (C60)/metal interfaces by the Kelvin probe method [J].