Study on the interaction between Ag and tris(8-hydroxyquinoline) aluminum using x-ray photoelectron spectroscopy

Weijie Song; S. K. So; John Moulder; Yong Qiu; Yongfa Zhu; Lili Cao

doi:10.1002/sia.1008

Study on the interaction between Ag and tris(8-hydroxyquinoline) aluminum using x-ray photoelectron spectroscopy

Weijie Song, S. K. So, John Moulder, Yong Qiu, Yongfa Zhu, Lili Cao^*

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Journal article › peer-review

15 Citations (Scopus)

Abstract

In the present study, model organic light-emitting diodes (OLEDs) with a structure of Ag/tris(8-hydroxyquinoline) aluminum (Alq₃)/indium tin oxide (ITO) were fabricated using vacuum evaporation and analyzed using an x-ray photoelectron spectroscopy (XPS) depth profile technique. Diffusion of Ag into the Alq₃ layer was clearly observed. Applying a positive electron field enhanced the diffusion. Compared with pure Ag, the binding energy of diffused Ag 3d_5/2 at the interface increased slightly, and the contribution of Ag to the valence-band spectra also was changed across the depth, implying a weak interaction between diffused Ag and the hydroxyquinoline ligands.

Original language	English
Pages (from-to)	70-73
Number of pages	4
Journal	Surface and Interface Analysis
Volume	32
Issue number	1
DOIs	https://doi.org/10.1002/sia.1008
Publication status	Published - Aug 2001

Scopus Subject Areas

General Chemistry
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

User-Defined Keywords

Ag
Alq
Interracial lnteraction
XPS depth profile

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10.1002/sia.1008

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title = "Study on the interaction between Ag and tris(8-hydroxyquinoline) aluminum using x-ray photoelectron spectroscopy",

abstract = "In the present study, model organic light-emitting diodes (OLEDs) with a structure of Ag/tris(8-hydroxyquinoline) aluminum (Alq3)/indium tin oxide (ITO) were fabricated using vacuum evaporation and analyzed using an x-ray photoelectron spectroscopy (XPS) depth profile technique. Diffusion of Ag into the Alq3 layer was clearly observed. Applying a positive electron field enhanced the diffusion. Compared with pure Ag, the binding energy of diffused Ag 3d5/2 at the interface increased slightly, and the contribution of Ag to the valence-band spectra also was changed across the depth, implying a weak interaction between diffused Ag and the hydroxyquinoline ligands.",

keywords = "Ag, Alq, Interracial lnteraction, XPS depth profile",

author = "Weijie Song and So, {S. K.} and John Moulder and Yong Qiu and Yongfa Zhu and Lili Cao",

year = "2001",

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T1 - Study on the interaction between Ag and tris(8-hydroxyquinoline) aluminum using x-ray photoelectron spectroscopy

AU - Song, Weijie

AU - So, S. K.

AU - Moulder, John

AU - Qiu, Yong

AU - Zhu, Yongfa

AU - Cao, Lili

PY - 2001/8

Y1 - 2001/8

N2 - In the present study, model organic light-emitting diodes (OLEDs) with a structure of Ag/tris(8-hydroxyquinoline) aluminum (Alq3)/indium tin oxide (ITO) were fabricated using vacuum evaporation and analyzed using an x-ray photoelectron spectroscopy (XPS) depth profile technique. Diffusion of Ag into the Alq3 layer was clearly observed. Applying a positive electron field enhanced the diffusion. Compared with pure Ag, the binding energy of diffused Ag 3d5/2 at the interface increased slightly, and the contribution of Ag to the valence-band spectra also was changed across the depth, implying a weak interaction between diffused Ag and the hydroxyquinoline ligands.

AB - In the present study, model organic light-emitting diodes (OLEDs) with a structure of Ag/tris(8-hydroxyquinoline) aluminum (Alq3)/indium tin oxide (ITO) were fabricated using vacuum evaporation and analyzed using an x-ray photoelectron spectroscopy (XPS) depth profile technique. Diffusion of Ag into the Alq3 layer was clearly observed. Applying a positive electron field enhanced the diffusion. Compared with pure Ag, the binding energy of diffused Ag 3d5/2 at the interface increased slightly, and the contribution of Ag to the valence-band spectra also was changed across the depth, implying a weak interaction between diffused Ag and the hydroxyquinoline ligands.

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KW - Interracial lnteraction

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JO - Surface and Interface Analysis

JF - Surface and Interface Analysis

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ER -

Study on the interaction between Ag and tris(8-hydroxyquinoline) aluminum using x-ray photoelectron spectroscopy

Abstract

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