Tris-(8-hydroxyquinoline)aluminum-modified indium tin oxide for enhancing the efficiency and reliability of organic light-emitting devices

Yoon-Fei Liew; Furong Zhu; Soo-Jin Chua; Jian-Xin Tang

doi:10.1063/1.1815374

Tris-(8-hydroxyquinoline)aluminum-modified indium tin oxide for enhancing the efficiency and reliability of organic light-emitting devices

Yoon-Fei Liew
, Furong Zhu
, Soo-Jin Chua
, Jian-Xin Tang

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

33 Citations (Scopus)

Abstract

Tris-(8-hydroxyquinoline)aluminum (Alq ₃), which is typically used as an electron transport material for organic light-emitting devices (OLEDs), was used in this study for OLED anode modification. The electronic structure at the indium tin oxide (ITO)/organic interface for improvement of carrier injection was studied using ultraviolet photoelectron spectroscopy. The interfacial analysis reveals that the barrier height at the ITO/organic interface can be varied from ∼ 0.6-1.08 eV. It is demonstrated that the barrier for hole injection from an ITO anode to a hole transporting layer can be engineered by inserting an ultrathin interlayer of Alq ₃, a few nanometers thick. The presence of an Alq ₃ interlayer is shown to improve the current balance, leading to an enhancement in the electroluminecent efficiency and operational stability of OLEDs. © 2004 American Institute of Physics.

Original language	English
Pages (from-to)	4511-4513
Journal	Applied Physics Letters
Volume	85
Issue number	19
DOIs	https://doi.org/10.1063/1.1815374
Publication status	Published - 8 Nov 2004

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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title = "Tris-(8-hydroxyquinoline)aluminum-modified indium tin oxide for enhancing the efficiency and reliability of organic light-emitting devices",

abstract = "Tris-(8-hydroxyquinoline)aluminum (Alq 3), which is typically used as an electron transport material for organic light-emitting devices (OLEDs), was used in this study for OLED anode modification. The electronic structure at the indium tin oxide (ITO)/organic interface for improvement of carrier injection was studied using ultraviolet photoelectron spectroscopy. The interfacial analysis reveals that the barrier height at the ITO/organic interface can be varied from ∼ 0.6-1.08 eV. It is demonstrated that the barrier for hole injection from an ITO anode to a hole transporting layer can be engineered by inserting an ultrathin interlayer of Alq 3, a few nanometers thick. The presence of an Alq 3 interlayer is shown to improve the current balance, leading to an enhancement in the electroluminecent efficiency and operational stability of OLEDs. {\textcopyright} 2004 American Institute of Physics.",

author = "Yoon-Fei Liew and Furong Zhu and Soo-Jin Chua and Jian-Xin Tang",

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Tris-(8-hydroxyquinoline)aluminum-modified indium tin oxide for enhancing the efficiency and reliability of organic light-emitting devices. / Liew, Yoon-Fei; Zhu, Furong; Chua, Soo-Jin et al.
In: Applied Physics Letters, Vol. 85, No. 19, 08.11.2004, p. 4511-4513.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Tris-(8-hydroxyquinoline)aluminum-modified indium tin oxide for enhancing the efficiency and reliability of organic light-emitting devices

AU - Liew, Yoon-Fei

AU - Zhu, Furong

AU - Chua, Soo-Jin

AU - Tang, Jian-Xin

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2004/11/8

Y1 - 2004/11/8

N2 - Tris-(8-hydroxyquinoline)aluminum (Alq 3), which is typically used as an electron transport material for organic light-emitting devices (OLEDs), was used in this study for OLED anode modification. The electronic structure at the indium tin oxide (ITO)/organic interface for improvement of carrier injection was studied using ultraviolet photoelectron spectroscopy. The interfacial analysis reveals that the barrier height at the ITO/organic interface can be varied from ∼ 0.6-1.08 eV. It is demonstrated that the barrier for hole injection from an ITO anode to a hole transporting layer can be engineered by inserting an ultrathin interlayer of Alq 3, a few nanometers thick. The presence of an Alq 3 interlayer is shown to improve the current balance, leading to an enhancement in the electroluminecent efficiency and operational stability of OLEDs. © 2004 American Institute of Physics.

AB - Tris-(8-hydroxyquinoline)aluminum (Alq 3), which is typically used as an electron transport material for organic light-emitting devices (OLEDs), was used in this study for OLED anode modification. The electronic structure at the indium tin oxide (ITO)/organic interface for improvement of carrier injection was studied using ultraviolet photoelectron spectroscopy. The interfacial analysis reveals that the barrier height at the ITO/organic interface can be varied from ∼ 0.6-1.08 eV. It is demonstrated that the barrier for hole injection from an ITO anode to a hole transporting layer can be engineered by inserting an ultrathin interlayer of Alq 3, a few nanometers thick. The presence of an Alq 3 interlayer is shown to improve the current balance, leading to an enhancement in the electroluminecent efficiency and operational stability of OLEDs. © 2004 American Institute of Physics.

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DO - 10.1063/1.1815374

M3 - RGC 21 - Publication in refereed journal

SN - 0003-6951

VL - 85

SP - 4511

EP - 4513

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 19

ER -

Tris-(8-hydroxyquinoline)aluminum-modified indium tin oxide for enhancing the efficiency and reliability of organic light-emitting devices

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