Hole injection or blocking? the role of CuPc in Alq3-based organic light-emitting devices

Y. Divayana; B. J. Chen; X. W. Sun; T. K.S. Wong; K. R. Sarma; X. Hu

doi:10.1016/j.jcrysgro.2005.12.026

Hole injection or blocking? the role of CuPc in Alq₃-based organic light-emitting devices

Y. Divayana, B. J. Chen, X. W. Sun^*, T. K.S. Wong, K. R. Sarma, X. Hu

^*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

It is known in tris-(8-hydroxyqunoline) aluminum-based organic light-emitting device, that copper-phthalocyanines (CuPc) inserted between the anode and the hole transport layer (HTL), has two opposing roles: improving and reducing the current injection. Despite of its controversy, no work has been done to clear the matter. Here, we addressed this controversy with experiments and simulations. Our results showed that, CuPc inserted between indium-tin-oxide (ITO) and HTL, played dual roles of hole-blocking and hole-injection. CuPc layer improves holes injection, when the amount of oxygen at the CuPc/HTL interface is small. However, CuPc layer switches to impede holes injection, when the oxygen diffusion from ITO to CuPc/HTL interface is severe.

Original language	English
Pages (from-to)	105-109
Number of pages	5
Journal	Journal of Crystal Growth
Volume	288
Issue number	1
DOIs	https://doi.org/10.1016/j.jcrysgro.2005.12.026
Publication status	Published - Feb 2 2006
Externally published	Yes
Event	International Conference on Materials for Advanced Technologies - Duration: Jul 4 2005 → Jul 8 2005

ASJC Scopus Subject Areas

Condensed Matter Physics
Inorganic Chemistry
Materials Chemistry

Keywords

B1. CuPc
B3. Hole blocking
B3. Hole injection
B3. Organic light-emitting devices

Access to Document

10.1016/j.jcrysgro.2005.12.026

Cite this

@article{e960b69b5a474b96b6aeac3a3b39fa12,

title = "Hole injection or blocking? the role of CuPc in Alq3-based organic light-emitting devices",

abstract = "It is known in tris-(8-hydroxyqunoline) aluminum-based organic light-emitting device, that copper-phthalocyanines (CuPc) inserted between the anode and the hole transport layer (HTL), has two opposing roles: improving and reducing the current injection. Despite of its controversy, no work has been done to clear the matter. Here, we addressed this controversy with experiments and simulations. Our results showed that, CuPc inserted between indium-tin-oxide (ITO) and HTL, played dual roles of hole-blocking and hole-injection. CuPc layer improves holes injection, when the amount of oxygen at the CuPc/HTL interface is small. However, CuPc layer switches to impede holes injection, when the oxygen diffusion from ITO to CuPc/HTL interface is severe.",

keywords = "B1. CuPc, B3. Hole blocking, B3. Hole injection, B3. Organic light-emitting devices",

author = "Y. Divayana and Chen, {B. J.} and Sun, {X. W.} and Wong, {T. K.S.} and Sarma, {K. R.} and X. Hu",

year = "2006",

month = feb,

day = "2",

doi = "10.1016/j.jcrysgro.2005.12.026",

language = "English",

volume = "288",

pages = "105--109",

journal = "Journal of Crystal Growth",

issn = "0022-0248",

publisher = "Elsevier",

number = "1",

note = "International Conference on Materials for Advanced Technologies ; Conference date: 04-07-2005 Through 08-07-2005",

}

TY - JOUR

T1 - Hole injection or blocking? the role of CuPc in Alq3-based organic light-emitting devices

AU - Divayana, Y.

AU - Chen, B. J.

AU - Sun, X. W.

AU - Wong, T. K.S.

AU - Sarma, K. R.

AU - Hu, X.

PY - 2006/2/2

Y1 - 2006/2/2

N2 - It is known in tris-(8-hydroxyqunoline) aluminum-based organic light-emitting device, that copper-phthalocyanines (CuPc) inserted between the anode and the hole transport layer (HTL), has two opposing roles: improving and reducing the current injection. Despite of its controversy, no work has been done to clear the matter. Here, we addressed this controversy with experiments and simulations. Our results showed that, CuPc inserted between indium-tin-oxide (ITO) and HTL, played dual roles of hole-blocking and hole-injection. CuPc layer improves holes injection, when the amount of oxygen at the CuPc/HTL interface is small. However, CuPc layer switches to impede holes injection, when the oxygen diffusion from ITO to CuPc/HTL interface is severe.

AB - It is known in tris-(8-hydroxyqunoline) aluminum-based organic light-emitting device, that copper-phthalocyanines (CuPc) inserted between the anode and the hole transport layer (HTL), has two opposing roles: improving and reducing the current injection. Despite of its controversy, no work has been done to clear the matter. Here, we addressed this controversy with experiments and simulations. Our results showed that, CuPc inserted between indium-tin-oxide (ITO) and HTL, played dual roles of hole-blocking and hole-injection. CuPc layer improves holes injection, when the amount of oxygen at the CuPc/HTL interface is small. However, CuPc layer switches to impede holes injection, when the oxygen diffusion from ITO to CuPc/HTL interface is severe.

KW - B1. CuPc

KW - B3. Hole blocking

KW - B3. Hole injection

KW - B3. Organic light-emitting devices

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U2 - 10.1016/j.jcrysgro.2005.12.026

DO - 10.1016/j.jcrysgro.2005.12.026

M3 - Conference article

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SN - 0022-0248

VL - 288

SP - 105

EP - 109

JO - Journal of Crystal Growth

JF - Journal of Crystal Growth

IS - 1

T2 - International Conference on Materials for Advanced Technologies

Y2 - 4 July 2005 through 8 July 2005

ER -