Efficiency and stability of different tris(8-hydroxyquinoline) aluminium (Alq3) derivatives in OLED applications

C. Y. Kwong; A. B. Djurišić; W. C.H. Choy; D. Li; M. H. Xie; W. K. Chan; K. W. Cheah; P. T. Lai; P. C. Chui

doi:10.1016/j.mseb.2004.09.024

Efficiency and stability of different tris(8-hydroxyquinoline) aluminium (Alq₃) derivatives in OLED applications

C. Y. Kwong, A. B. Djurišić^*, W. C.H. Choy, D. Li, M. H. Xie, W. K. Chan, K. W. Cheah, P. T. Lai, P. C. Chui

^*Corresponding author for this work

Department of Physics

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

57 Citations (Scopus)

Abstract

In this work, we have investigated the material stability and organic light emitting diode (OLED) performance for tris-(8-hydroxyquinoline) aluminium (Alq₃) and for three of the Alq₃ derivatives. For each material, electron spin resonance (ESR) measurements were performed and the degradation of photoluminescence (PL) with atmosphere exposure was studied. Performance of OLEDs based on these materials was also studied. The device structure was ITO/N,N′-di(naphthalene-1-yl)-N,N′-diphenyl-benzidine (NPB) (50nm)/Alq₃ or Alq₃ derivatives (60nm)/LiF (0.3nm)/Al (60 nm). It was found that the rate of PL decay of the films correlates strongly with the existence of ESR signal. However, stability of OLEDs fabricated from these materials showed no direct relationship with PL decay in the films. This indicates that the dominant degradation mechanism in OLEDs is related to the passage of electric current through the device. Detailed discussion of the performances of four light emitting materials in terms of efficiency and stability is given.

Original language	English
Pages (from-to)	75-81
Number of pages	7
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	116
Issue number	1
DOIs	https://doi.org/10.1016/j.mseb.2004.09.024
Publication status	Published - 15 Jan 2005

Scopus Subject Areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

User-Defined Keywords

OLED
Photoluminescence
Tris-(8-hydroxyquinoline) aluminium

Access to Document

10.1016/j.mseb.2004.09.024

Cite this

Kwong, C. Y., Djurišić, A. B., Choy, W. C. H., Li, D., Xie, M. H., Chan, W. K., Cheah, K. W., Lai, P. T., & Chui, P. C. (2005). Efficiency and stability of different tris(8-hydroxyquinoline) aluminium (Alq₃) derivatives in OLED applications. Materials Science and Engineering B: Solid-State Materials for Advanced Technology, 116(1), 75-81. https://doi.org/10.1016/j.mseb.2004.09.024

@article{880f9ee337914269b0ab0acc47159b93,

title = "Efficiency and stability of different tris(8-hydroxyquinoline) aluminium (Alq3) derivatives in OLED applications",

abstract = "In this work, we have investigated the material stability and organic light emitting diode (OLED) performance for tris-(8-hydroxyquinoline) aluminium (Alq3) and for three of the Alq3 derivatives. For each material, electron spin resonance (ESR) measurements were performed and the degradation of photoluminescence (PL) with atmosphere exposure was studied. Performance of OLEDs based on these materials was also studied. The device structure was ITO/N,N′-di(naphthalene-1-yl)-N,N′-diphenyl-benzidine (NPB) (50nm)/Alq3 or Alq3 derivatives (60nm)/LiF (0.3nm)/Al (60 nm). It was found that the rate of PL decay of the films correlates strongly with the existence of ESR signal. However, stability of OLEDs fabricated from these materials showed no direct relationship with PL decay in the films. This indicates that the dominant degradation mechanism in OLEDs is related to the passage of electric current through the device. Detailed discussion of the performances of four light emitting materials in terms of efficiency and stability is given.",

keywords = "OLED, Photoluminescence, Tris-(8-hydroxyquinoline) aluminium",

author = "Kwong, {C. Y.} and Djuri{\v s}i{\'c}, {A. B.} and Choy, {W. C.H.} and D. Li and Xie, {M. H.} and Chan, {W. K.} and Cheah, {K. W.} and Lai, {P. T.} and Chui, {P. C.}",

note = "Funding Information: This work is supported by the seed funding grant of the University of Hong Kong and The Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. HKU 7096/00P, HKU 7075/01P, and HKU7056/02E).",

year = "2005",

month = jan,

day = "15",

doi = "10.1016/j.mseb.2004.09.024",

language = "English",

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Kwong, CY, Djurišić, AB, Choy, WCH, Li, D, Xie, MH, Chan, WK, Cheah, KW, Lai, PT & Chui, PC 2005, 'Efficiency and stability of different tris(8-hydroxyquinoline) aluminium (Alq₃) derivatives in OLED applications', Materials Science and Engineering B: Solid-State Materials for Advanced Technology, vol. 116, no. 1, pp. 75-81. https://doi.org/10.1016/j.mseb.2004.09.024

Efficiency and stability of different tris(8-hydroxyquinoline) aluminium (Alq₃) derivatives in OLED applications. / Kwong, C. Y.; Djurišić, A. B.; Choy, W. C.H. et al.
In: Materials Science and Engineering B: Solid-State Materials for Advanced Technology, Vol. 116, No. 1, 15.01.2005, p. 75-81.

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

TY - JOUR

T1 - Efficiency and stability of different tris(8-hydroxyquinoline) aluminium (Alq3) derivatives in OLED applications

AU - Kwong, C. Y.

AU - Djurišić, A. B.

AU - Choy, W. C.H.

AU - Li, D.

AU - Xie, M. H.

AU - Chan, W. K.

AU - Cheah, K. W.

AU - Lai, P. T.

AU - Chui, P. C.

N1 - Funding Information: This work is supported by the seed funding grant of the University of Hong Kong and The Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. HKU 7096/00P, HKU 7075/01P, and HKU7056/02E).

PY - 2005/1/15

Y1 - 2005/1/15

N2 - In this work, we have investigated the material stability and organic light emitting diode (OLED) performance for tris-(8-hydroxyquinoline) aluminium (Alq3) and for three of the Alq3 derivatives. For each material, electron spin resonance (ESR) measurements were performed and the degradation of photoluminescence (PL) with atmosphere exposure was studied. Performance of OLEDs based on these materials was also studied. The device structure was ITO/N,N′-di(naphthalene-1-yl)-N,N′-diphenyl-benzidine (NPB) (50nm)/Alq3 or Alq3 derivatives (60nm)/LiF (0.3nm)/Al (60 nm). It was found that the rate of PL decay of the films correlates strongly with the existence of ESR signal. However, stability of OLEDs fabricated from these materials showed no direct relationship with PL decay in the films. This indicates that the dominant degradation mechanism in OLEDs is related to the passage of electric current through the device. Detailed discussion of the performances of four light emitting materials in terms of efficiency and stability is given.

AB - In this work, we have investigated the material stability and organic light emitting diode (OLED) performance for tris-(8-hydroxyquinoline) aluminium (Alq3) and for three of the Alq3 derivatives. For each material, electron spin resonance (ESR) measurements were performed and the degradation of photoluminescence (PL) with atmosphere exposure was studied. Performance of OLEDs based on these materials was also studied. The device structure was ITO/N,N′-di(naphthalene-1-yl)-N,N′-diphenyl-benzidine (NPB) (50nm)/Alq3 or Alq3 derivatives (60nm)/LiF (0.3nm)/Al (60 nm). It was found that the rate of PL decay of the films correlates strongly with the existence of ESR signal. However, stability of OLEDs fabricated from these materials showed no direct relationship with PL decay in the films. This indicates that the dominant degradation mechanism in OLEDs is related to the passage of electric current through the device. Detailed discussion of the performances of four light emitting materials in terms of efficiency and stability is given.

KW - OLED

KW - Photoluminescence

KW - Tris-(8-hydroxyquinoline) aluminium

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U2 - 10.1016/j.mseb.2004.09.024

DO - 10.1016/j.mseb.2004.09.024

M3 - Journal article

AN - SCOPUS:9644287974

SN - 0921-5107

VL - 116

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EP - 81

JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

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