Gold work function reduction by 2.2 eV with an air-stable molecular donor layer

被引：67

作者：

Broeker, B. ^{[1
]}

Blum, R. -P. ^{[1
]}

Frisch, J. ^{[1
]}

Vollmer, A. ^{[2
]}

Hofmann, O. T. ^{[3
]}

Rieger, R. ^{[4
]}

Muellen, K. ^{[4
]}

Rabe, J. P. ^{[1
]}

Zojer, E. ^{[3
]}

Koch, N. ^{[1
]}

机构：

[1] Humboldt Univ, Inst Phys, D-12389 Berlin, Germany

[2] Helmholtz Zentrum Berlin Mat & Energie BESSY II, D-12489 Berlin, Germany

[3] Graz Univ Technol, Inst Solid State Phys, A-8010 Graz, Austria

[4] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 24期

关键词：

binding energy; charge injection; energy states; gold; organic semiconductors; photoelectron spectra; ultraviolet spectra; work function;

D O I：

10.1063/1.3049616

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ultraviolet photoelectron spectroscopy was used to investigate neutral methyl viologen (1,1(')-dimethyl-1H,1(')H-[4,4(')]bipyridinylidene, MV0) deposited on Au(111). As a result of molecule-to-metal electron transfer, the work function of Au(111) was decreased from 5.50 to 3.30 eV. The energy levels of electron transport layers deposited on top of modified Au surfaces were shifted to higher binding energies compared to layers on pristine Au, and the electron injection barrier was reduced by 0.80 eV for tris(8-hydroxyquinoline)aluminum (Alq(3)) and by 0.65 eV for C(60). The air-stable donor MV0 can thus be used to facilitate electron injection into organic semiconductors even from high work function metals.

引用

页数：3

共 35 条

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