High efficiency deep blue phosphorescent organic light-emitting diodes using a double emissive layer structure

Jonghee Lee; Jeong Ik Lee; Jun Yeob Lee; Hye Yong Chu

doi:10.1016/j.synthmet.2009.06.022

High efficiency deep blue phosphorescent organic light-emitting diodes using a double emissive layer structure

Jonghee Lee, Jeong Ik Lee, Jun Yeob Lee, Hye Yong Chu

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

7 Scopus citations

Abstract

High efficiency deep blue phosphorescent organic light-emitting diodes (PHOLEDs) have been developed with a double emissive layer structure (D-EML). Using bis(4′,6′-difluorophenylpyridinato)tetrakis(1-pyrazolyl)borate (FIr6) as an electro-phosphorescent dopant, we achieved a maximum external quantum efficiency of 14.8% in the deep blue PHOLEDs with D-EMLs, which is 50% higher value than that of 9.76% with single emissive layer structure (S-EML). Moreover, the external quantum efficiency at high current density region of 10 mA/cm² was maintained up to 11.3% in this D-EML device. We attributed this enhancement to the expansion of carrier recombination region and the effective confinement of exciton within the emissive layer. Crown

Original language	English
Pages (from-to)	1956-1959
Number of pages	4
Journal	Synthetic Metals
Volume	159
Issue number	19-20
DOIs	https://doi.org/10.1016/j.synthmet.2009.06.022
State	Published - Oct 2009
Externally published	Yes

Keywords

Deep blue phosphorescent
Double emissive layer structures (D-EMLs)
Organic light-emitting diodes (OLEDs)
Quantum efficiency

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10.1016/j.synthmet.2009.06.022

Cite this

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title = "High efficiency deep blue phosphorescent organic light-emitting diodes using a double emissive layer structure",

abstract = "High efficiency deep blue phosphorescent organic light-emitting diodes (PHOLEDs) have been developed with a double emissive layer structure (D-EML). Using bis(4′,6′-difluorophenylpyridinato)tetrakis(1-pyrazolyl)borate (FIr6) as an electro-phosphorescent dopant, we achieved a maximum external quantum efficiency of 14.8\% in the deep blue PHOLEDs with D-EMLs, which is 50\% higher value than that of 9.76\% with single emissive layer structure (S-EML). Moreover, the external quantum efficiency at high current density region of 10 mA/cm2 was maintained up to 11.3\% in this D-EML device. We attributed this enhancement to the expansion of carrier recombination region and the effective confinement of exciton within the emissive layer. Crown",

keywords = "Deep blue phosphorescent, Double emissive layer structures (D-EMLs), Organic light-emitting diodes (OLEDs), Quantum efficiency",

author = "Jonghee Lee and Lee, \{Jeong Ik\} and Lee, \{Jun Yeob\} and Chu, \{Hye Yong\}",

year = "2009",

month = oct,

doi = "10.1016/j.synthmet.2009.06.022",

language = "English",

volume = "159",

pages = "1956--1959",

journal = "Synthetic Metals",

issn = "0379-6779",

publisher = "Elsevier B.V.",

number = "19-20",

}

TY - JOUR

T1 - High efficiency deep blue phosphorescent organic light-emitting diodes using a double emissive layer structure

AU - Lee, Jonghee

AU - Lee, Jeong Ik

AU - Lee, Jun Yeob

AU - Chu, Hye Yong

PY - 2009/10

Y1 - 2009/10

N2 - High efficiency deep blue phosphorescent organic light-emitting diodes (PHOLEDs) have been developed with a double emissive layer structure (D-EML). Using bis(4′,6′-difluorophenylpyridinato)tetrakis(1-pyrazolyl)borate (FIr6) as an electro-phosphorescent dopant, we achieved a maximum external quantum efficiency of 14.8% in the deep blue PHOLEDs with D-EMLs, which is 50% higher value than that of 9.76% with single emissive layer structure (S-EML). Moreover, the external quantum efficiency at high current density region of 10 mA/cm2 was maintained up to 11.3% in this D-EML device. We attributed this enhancement to the expansion of carrier recombination region and the effective confinement of exciton within the emissive layer. Crown

AB - High efficiency deep blue phosphorescent organic light-emitting diodes (PHOLEDs) have been developed with a double emissive layer structure (D-EML). Using bis(4′,6′-difluorophenylpyridinato)tetrakis(1-pyrazolyl)borate (FIr6) as an electro-phosphorescent dopant, we achieved a maximum external quantum efficiency of 14.8% in the deep blue PHOLEDs with D-EMLs, which is 50% higher value than that of 9.76% with single emissive layer structure (S-EML). Moreover, the external quantum efficiency at high current density region of 10 mA/cm2 was maintained up to 11.3% in this D-EML device. We attributed this enhancement to the expansion of carrier recombination region and the effective confinement of exciton within the emissive layer. Crown

KW - Deep blue phosphorescent

KW - Double emissive layer structures (D-EMLs)

KW - Organic light-emitting diodes (OLEDs)

KW - Quantum efficiency

UR - https://www.scopus.com/pages/publications/70349492405

U2 - 10.1016/j.synthmet.2009.06.022

DO - 10.1016/j.synthmet.2009.06.022

M3 - Article

AN - SCOPUS:70349492405

SN - 0379-6779

VL - 159

SP - 1956

EP - 1959

JO - Synthetic Metals

JF - Synthetic Metals

IS - 19-20

ER -

High efficiency deep blue phosphorescent organic light-emitting diodes using a double emissive layer structure

Abstract

Keywords

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