Above 30% external quantum efficiency in green delayed fluorescent organic light-emitting diodes

Dong Ryun Lee; Bo Seong Kim; Chil Won Lee; Yirang Im; Kyoung Soo Yook; Seok Ho Hwang; Jun Yeob Lee

doi:10.1021/acsami.5b01220

Above 30% external quantum efficiency in green delayed fluorescent organic light-emitting diodes

Dong Ryun Lee, Bo Seong Kim, Chil Won Lee, Yirang Im, Kyoung Soo Yook, Seok Ho Hwang, Jun Yeob Lee

Department of Chemical Engineering

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

239 Scopus citations

Abstract

Highly efficient green thermally activated delayed fluorescent organic light-emitting diodes with an external quantum efficiency of 31.2% were investigated by using 3-(3-(carbazole-9-yl)phenyl) pyrido[3′,2′:4,5]furo[2,3-b]pyridine (3CzPFP) derived from carbazole and pyrido[3′,2′:4,5]furo[2,3-b]pyridine. The host material showed well-matched photoluminescence emission with absorption of the green dopant material, (4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN) and harvested all excitons of 4CzIPN. The 3CzPFP:4CzIPN film exhibited high photoluminescence quantum yield of 100%, and the green delayed fluorescence device employing the 3CzPFP host showed high maximum quantum efficiency of 31.2 ± 0.5% at 1% doping after optimization of the device structure.

Original language	English
Pages (from-to)	9625-9629
Number of pages	5
Journal	ACS Applied Materials and Interfaces
Volume	7
Issue number	18
DOIs	https://doi.org/10.1021/acsami.5b01220
State	Published - 13 May 2015

Keywords

bipolar host
delayed fluorescence
green fluorescent device
high quantum efficiency
high triplet energy

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10.1021/acsami.5b01220

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@article{4c1819c3b868494eb97bdffec8239651,

title = "Above 30\% external quantum efficiency in green delayed fluorescent organic light-emitting diodes",

abstract = "Highly efficient green thermally activated delayed fluorescent organic light-emitting diodes with an external quantum efficiency of 31.2\% were investigated by using 3-(3-(carbazole-9-yl)phenyl) pyrido[3′,2′:4,5]furo[2,3-b]pyridine (3CzPFP) derived from carbazole and pyrido[3′,2′:4,5]furo[2,3-b]pyridine. The host material showed well-matched photoluminescence emission with absorption of the green dopant material, (4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN) and harvested all excitons of 4CzIPN. The 3CzPFP:4CzIPN film exhibited high photoluminescence quantum yield of 100\%, and the green delayed fluorescence device employing the 3CzPFP host showed high maximum quantum efficiency of 31.2 ± 0.5\% at 1\% doping after optimization of the device structure.",

keywords = "bipolar host, delayed fluorescence, green fluorescent device, high quantum efficiency, high triplet energy",

author = "Lee, \{Dong Ryun\} and Kim, \{Bo Seong\} and Lee, \{Chil Won\} and Yirang Im and Yook, \{Kyoung Soo\} and Hwang, \{Seok Ho\} and Lee, \{Jun Yeob\}",

note = "Publisher Copyright: {\textcopyright} 2015 American Chemical Society.",

year = "2015",

month = may,

day = "13",

doi = "10.1021/acsami.5b01220",

language = "English",

volume = "7",

pages = "9625--9629",

journal = "ACS Applied Materials and Interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

number = "18",

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T1 - Above 30% external quantum efficiency in green delayed fluorescent organic light-emitting diodes

AU - Lee, Dong Ryun

AU - Kim, Bo Seong

AU - Lee, Chil Won

AU - Im, Yirang

AU - Yook, Kyoung Soo

AU - Hwang, Seok Ho

AU - Lee, Jun Yeob

PY - 2015/5/13

Y1 - 2015/5/13

N2 - Highly efficient green thermally activated delayed fluorescent organic light-emitting diodes with an external quantum efficiency of 31.2% were investigated by using 3-(3-(carbazole-9-yl)phenyl) pyrido[3′,2′:4,5]furo[2,3-b]pyridine (3CzPFP) derived from carbazole and pyrido[3′,2′:4,5]furo[2,3-b]pyridine. The host material showed well-matched photoluminescence emission with absorption of the green dopant material, (4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN) and harvested all excitons of 4CzIPN. The 3CzPFP:4CzIPN film exhibited high photoluminescence quantum yield of 100%, and the green delayed fluorescence device employing the 3CzPFP host showed high maximum quantum efficiency of 31.2 ± 0.5% at 1% doping after optimization of the device structure.

AB - Highly efficient green thermally activated delayed fluorescent organic light-emitting diodes with an external quantum efficiency of 31.2% were investigated by using 3-(3-(carbazole-9-yl)phenyl) pyrido[3′,2′:4,5]furo[2,3-b]pyridine (3CzPFP) derived from carbazole and pyrido[3′,2′:4,5]furo[2,3-b]pyridine. The host material showed well-matched photoluminescence emission with absorption of the green dopant material, (4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN) and harvested all excitons of 4CzIPN. The 3CzPFP:4CzIPN film exhibited high photoluminescence quantum yield of 100%, and the green delayed fluorescence device employing the 3CzPFP host showed high maximum quantum efficiency of 31.2 ± 0.5% at 1% doping after optimization of the device structure.

KW - bipolar host

KW - delayed fluorescence

KW - green fluorescent device

KW - high quantum efficiency

KW - high triplet energy

UR - https://www.scopus.com/pages/publications/84929172449

U2 - 10.1021/acsami.5b01220

DO - 10.1021/acsami.5b01220

M3 - Article

AN - SCOPUS:84929172449

SN - 1944-8244

VL - 7

SP - 9625

EP - 9629

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 18

ER -

Above 30% external quantum efficiency in green delayed fluorescent organic light-emitting diodes

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Keywords

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