Improved performance of organic light-emitting device with anatase TiO 2 anode

Masaki Nakano; Tomoteru Fukumura; Hidemi Toyosaki; Kazunori Ueno; Masashi Kawasaki

doi:10.1143/JJAP.47.1276

Improved performance of organic light-emitting device with anatase TiO ₂ anode

Masaki Nakano, Tomoteru Fukumura, Hidemi Toyosaki, Kazunori Ueno, Masashi Kawasaki

SCI - Chemistry

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

1 Citation (Scopus)

Abstract

An organic light-emitting device (OLED) with a Nb-doped anatase TiO ₂ thin film on a LaAlO₃ substrate as an anode shows higher performance than OLEDs with a rutile TiO₂ anode. The OLED structure is TiO₂/poly(3,4-ethylene dioxythiophene): polystyrene sulfonate) (PEDOT:PSS)/N,N′-di-[(1-naphthalenyl)-N,N″-diphenyl]-( 1,1′-biphenyl)-4,4′-diamine (α-NPD)/tris-(8-hydroxyquinoline) aluminum (Alq₃)/LiF/Al. The maximum luminance is about 3200 cd/m ² at 20V, and the current efficiency is approximately 2-3 cd/A, which is comparable to that of a reference OLED with an Sn-doped In₂O ₃ (ITO) anode. We speculate that the improvement of the OLED performance comes from the low resistivity with a relatively low electron density of anatase TiO₂.

Original language	English
Pages (from-to)	1276-1278
Number of pages	3
Journal	Japanese Journal of Applied Physics
Volume	47
Issue number	2 PART 2
DOIs	https://doi.org/10.1143/JJAP.47.1276
Publication status	Published - 2008 Feb 15

Keywords

Anode
Carrier mobility
Hole injection barrier
Nb-doped anatase TiO
Organic light-emitting device
Oxide semiconductor

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title = "Improved performance of organic light-emitting device with anatase TiO 2 anode",

abstract = "An organic light-emitting device (OLED) with a Nb-doped anatase TiO 2 thin film on a LaAlO3 substrate as an anode shows higher performance than OLEDs with a rutile TiO2 anode. The OLED structure is TiO2/poly(3,4-ethylene dioxythiophene): polystyrene sulfonate) (PEDOT:PSS)/N,N′-di-[(1-naphthalenyl)-N,N″-diphenyl]-( 1,1′-biphenyl)-4,4′-diamine (α-NPD)/tris-(8-hydroxyquinoline) aluminum (Alq3)/LiF/Al. The maximum luminance is about 3200 cd/m 2 at 20V, and the current efficiency is approximately 2-3 cd/A, which is comparable to that of a reference OLED with an Sn-doped In2O 3 (ITO) anode. We speculate that the improvement of the OLED performance comes from the low resistivity with a relatively low electron density of anatase TiO2.",

keywords = "Anode, Carrier mobility, Hole injection barrier, Nb-doped anatase TiO, Organic light-emitting device, Oxide semiconductor",

author = "Masaki Nakano and Tomoteru Fukumura and Hidemi Toyosaki and Kazunori Ueno and Masashi Kawasaki",

year = "2008",

month = feb,

day = "15",

doi = "10.1143/JJAP.47.1276",

language = "English",

volume = "47",

pages = "1276--1278",

journal = "Japanese Journal of Applied Physics",

issn = "0021-4922",

publisher = "Japan Society of Applied Physics",

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TY - JOUR

T1 - Improved performance of organic light-emitting device with anatase TiO 2 anode

AU - Nakano, Masaki

AU - Fukumura, Tomoteru

AU - Toyosaki, Hidemi

AU - Ueno, Kazunori

AU - Kawasaki, Masashi

PY - 2008/2/15

Y1 - 2008/2/15

N2 - An organic light-emitting device (OLED) with a Nb-doped anatase TiO 2 thin film on a LaAlO3 substrate as an anode shows higher performance than OLEDs with a rutile TiO2 anode. The OLED structure is TiO2/poly(3,4-ethylene dioxythiophene): polystyrene sulfonate) (PEDOT:PSS)/N,N′-di-[(1-naphthalenyl)-N,N″-diphenyl]-( 1,1′-biphenyl)-4,4′-diamine (α-NPD)/tris-(8-hydroxyquinoline) aluminum (Alq3)/LiF/Al. The maximum luminance is about 3200 cd/m 2 at 20V, and the current efficiency is approximately 2-3 cd/A, which is comparable to that of a reference OLED with an Sn-doped In2O 3 (ITO) anode. We speculate that the improvement of the OLED performance comes from the low resistivity with a relatively low electron density of anatase TiO2.

AB - An organic light-emitting device (OLED) with a Nb-doped anatase TiO 2 thin film on a LaAlO3 substrate as an anode shows higher performance than OLEDs with a rutile TiO2 anode. The OLED structure is TiO2/poly(3,4-ethylene dioxythiophene): polystyrene sulfonate) (PEDOT:PSS)/N,N′-di-[(1-naphthalenyl)-N,N″-diphenyl]-( 1,1′-biphenyl)-4,4′-diamine (α-NPD)/tris-(8-hydroxyquinoline) aluminum (Alq3)/LiF/Al. The maximum luminance is about 3200 cd/m 2 at 20V, and the current efficiency is approximately 2-3 cd/A, which is comparable to that of a reference OLED with an Sn-doped In2O 3 (ITO) anode. We speculate that the improvement of the OLED performance comes from the low resistivity with a relatively low electron density of anatase TiO2.

KW - Anode

KW - Carrier mobility

KW - Hole injection barrier

KW - Nb-doped anatase TiO

KW - Organic light-emitting device

KW - Oxide semiconductor

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JO - Japanese Journal of Applied Physics

JF - Japanese Journal of Applied Physics

IS - 2 PART 2

ER -

Improved performance of organic light-emitting device with anatase TiO ₂ anode

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Keywords

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