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

收藏

页码：65 / 69

页数：5

相关论文

共 32 条

[1] Molecular model T6:C60 bulk-heterojunction solar cells [J].

Alem, S. ;

Pandey, A. K. ;

Unni, K. N. N. ;

Nunzi, J. -M. ;

Blanchard, P. .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 2006, 24 (03) :645-648

[2] C-60 AND C-70 FULLERENES AND POTASSIUM FULLERIDES [J].

BENNING, PJ ;

POIRIER, DM ;

OHNO, TR ;

CHEN, Y ;

JOST, MB ;

STEPNIAK, F ;

KROLL, GH ;

WEAVER, JH ;

FURE, J ;

SMALLEY, RE .

PHYSICAL REVIEW B, 1992, 45 (12) :6899-6913

[3] Electronic structure of the complexes of fullerene C60 with polyaromatic molecules [J].

Bulusheva, LG ;

Okotrub, AV ;

Gusel'nikov, AV ;

Konarev, DV ;

Litvinov, AL ;

Lyubovskaya, RN .

JOURNAL OF MOLECULAR STRUCTURE, 2003, 648 (03) :183-189

[4] Solar cells based on poly(3-alkyl)thiophenes and [60]fullerene: a comparative study [J].

Camaioni, N ;

Garlaschelli, L ;

Geri, A ;

Maggini, M ;

Possamai, G ;

Ridolfi, G .

JOURNAL OF MATERIALS CHEMISTRY, 2002, 12 (07) :2065-2070

[5] Electronic structure of hybrid interfaces for polymer-based electronics [J].

Fahlman, M. ;

Crispin, A. ;

Crispin, X. ;

Henze, S. K. M. ;

de Jong, M. P. ;

Osikowicz, W. ;

Tengstedt, C. ;

Salaneck, W. R. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2007, 19 (18)

[6]

Fichou D., 1999, HDB OLIGO POLYTHIOPH

[7] Imaging photoelectron transmission through self-assembled monolayers: The work-function of alkanethiols coated gold [J].

Fragouli, Despina ;

Kitsopoulos, Theofanis N. ;

Chiodo, L. ;

Della Sala, F. ;

Cingolani, R. ;

Ray, S. G. ;

Naaman, R. .

LANGMUIR, 2007, 23 (11) :6156-6162

[8] Effect of electrical doping on molecular level alignment at organic-organic heterojunctions [J].

Gao, WY ;

Kahn, A .

APPLIED PHYSICS LETTERS, 2003, 82 (26) :4815-4817

[9] Electronic structure of hybrid interfaces of poly(9,9-dioctylfluorene) [J].

Greczynski, G ;

Fahlman, M ;

Salaneck, WR .

CHEMICAL PHYSICS LETTERS, 2000, 321 (5-6) :379-384

[10] Comparison between calculated and measured photoemission spectra of C60 thin films [J].

Hasegawa, S ;

Miyamae, T ;

Yakushi, K ;

Inokuchi, H ;

Seki, K ;

Ueno, N .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1998, 88 :891-895

← 1 2 3 4 →