Interface energetics at WOX/organic interfaces: The role of oxygen vacancies

Zheng Zhang; Huai Xin Wei; Guo Fu Ma; Yan Qing Li; Shuit Tong Lee; Jian Xin Tang

doi:10.1063/1.4822173

Interface energetics at WO_X/organic interfaces: The role of oxygen vacancies

Zheng Zhang
, Huai Xin Wei
, Guo Fu Ma
, Yan Qing Li^*
, Shuit Tong Lee
, Jian Xin Tang

^*Corresponding author for this work

Soochow University

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

Oxygen vacancy in tungsten oxide (WO_X) is critical to the interface energetics for charge injection and transport in organic electronic devices. Here, we systematically studied the impact of oxygen vacancy on electronic structures of the WO_X/organic hole-transport layer interface via photoemission spectroscopy. The partial reduction of W cations and a decrease in its work function were observed by controlling the degree of oxygen vacancies in WO_X with thermal annealing, which are due to the partial filling of the unoccupied 5d orbitals. The increase in oxygen deficiency caused the increase of hole-injection barrier at WO_X/organic interfaces.

Original language	English
Article number	133302
Journal	Applied Physics Letters
Volume	103
Issue number	13
DOIs	https://doi.org/10.1063/1.4822173
State	Published - 23 Sep 2013
Externally published	Yes

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title = "Interface energetics at WOX/organic interfaces: The role of oxygen vacancies",

abstract = "Oxygen vacancy in tungsten oxide (WOX) is critical to the interface energetics for charge injection and transport in organic electronic devices. Here, we systematically studied the impact of oxygen vacancy on electronic structures of the WOX/organic hole-transport layer interface via photoemission spectroscopy. The partial reduction of W cations and a decrease in its work function were observed by controlling the degree of oxygen vacancies in WOX with thermal annealing, which are due to the partial filling of the unoccupied 5d orbitals. The increase in oxygen deficiency caused the increase of hole-injection barrier at WOX/organic interfaces.",

author = "Zheng Zhang and Wei, \{Huai Xin\} and Ma, \{Guo Fu\} and Li, \{Yan Qing\} and Lee, \{Shuit Tong\} and Tang, \{Jian Xin\}",

year = "2013",

month = sep,

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doi = "10.1063/1.4822173",

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T1 - Interface energetics at WOX/organic interfaces

T2 - The role of oxygen vacancies

AU - Zhang, Zheng

AU - Wei, Huai Xin

AU - Ma, Guo Fu

AU - Li, Yan Qing

AU - Lee, Shuit Tong

AU - Tang, Jian Xin

PY - 2013/9/23

Y1 - 2013/9/23

N2 - Oxygen vacancy in tungsten oxide (WOX) is critical to the interface energetics for charge injection and transport in organic electronic devices. Here, we systematically studied the impact of oxygen vacancy on electronic structures of the WOX/organic hole-transport layer interface via photoemission spectroscopy. The partial reduction of W cations and a decrease in its work function were observed by controlling the degree of oxygen vacancies in WOX with thermal annealing, which are due to the partial filling of the unoccupied 5d orbitals. The increase in oxygen deficiency caused the increase of hole-injection barrier at WOX/organic interfaces.

AB - Oxygen vacancy in tungsten oxide (WOX) is critical to the interface energetics for charge injection and transport in organic electronic devices. Here, we systematically studied the impact of oxygen vacancy on electronic structures of the WOX/organic hole-transport layer interface via photoemission spectroscopy. The partial reduction of W cations and a decrease in its work function were observed by controlling the degree of oxygen vacancies in WOX with thermal annealing, which are due to the partial filling of the unoccupied 5d orbitals. The increase in oxygen deficiency caused the increase of hole-injection barrier at WOX/organic interfaces.

UR - https://www.scopus.com/pages/publications/84885002963

U2 - 10.1063/1.4822173

DO - 10.1063/1.4822173

M3 - 文章

AN - SCOPUS:84885002963

SN - 0003-6951

VL - 103

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 13

M1 - 133302

ER -

Interface energetics at WO_X/organic interfaces: The role of oxygen vacancies

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