Molecular design of large-bandgap host materials and their application to blue phosphorescent organic light-emitting diodes

Ju Sik Kang; Tae Ryang Hong; Hyung Jong Kim; Young Hoon Son; Jong Kwan Bin; Bang Sook Lee; Joong Hwan Yang; Jin Wuk Kim; Min Ju Cho; Jang Hyuk Kwon; Dong Hoon Choi

doi:10.1016/j.orgel.2015.07.020

Molecular design of large-bandgap host materials and their application to blue phosphorescent organic light-emitting diodes

Ju Sik Kang, Tae Ryang Hong, Hyung Jong Kim, Young Hoon Son, Jong Kwan Bin, Bang Sook Lee, Joong Hwan Yang, Jin Wuk Kim, Min Ju Cho, Jang Hyuk Kwon, Dong Hoon Choi

Department of Chemistry

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

7 Citations (Scopus)

Abstract

Abstract New large-bandgap host materials with carbazole and carboline moieties were designed and synthesized for high-performance blue phosphorescent organic light-emitting diodes (PhOLEDs). The two kinds of host materials, 9-(4-(9H-carbazol-9-yl)phenyl)-6-(9H-carbazol-9-yl)-9H-pyrido[2,3-b]indole (pP2CZCB) and 9-(3-(9H-carbazol-9-yl)phenyl)-6-(9H-carbazol-9-yl)-9H-pyrido[2,3-b]indole (mP2CZCB), displayed promisingly high triplet energies of ∼2.92-2.93 eV for enhancing the exothermic energy transfer to bis[2-(4,6-difluorophenyl)pyridinato-C²,N](picolinato)iridium(III) (FIrpic) in PhOLED devices. It was found that the blue PhOLEDs bearing the new host materials and the FIrpic dopant exhibited markedly higher external quantum efficiencies (EQEs) than a device made with 1,3-bis(N-carbazolyl)benzene (mCP) as the host. In particular, the PhOLED device made with 3 wt% FIrpic as the dopant and mP2CZCB as the host material displayed a low driving voltage of 4.13 V and the high EQE of 25.3% at 1000 cd m^-2.

Original language	English
Article number	3182
Pages (from-to)	218-224
Number of pages	7
Journal	Organic Electronics
Volume	26
DOIs	https://doi.org/10.1016/j.orgel.2015.07.020
Publication status	Published - 2015 Jul 27

Keywords

Blue phosphorescence
Carbazole
Carboline
Host material
Organic light emitting diode

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Chemistry(all)
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

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10.1016/j.orgel.2015.07.020

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Molecular design of large-bandgap host materials and their application to blue phosphorescent organic light-emitting diodes. / Kang, Ju Sik; Hong, Tae Ryang; Kim, Hyung Jong; Son, Young Hoon; Bin, Jong Kwan; Lee, Bang Sook; Yang, Joong Hwan; Kim, Jin Wuk; Cho, Min Ju; Kwon, Jang Hyuk; Choi, Dong Hoon.

In: Organic Electronics, Vol. 26, 3182, 27.07.2015, p. 218-224.

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

@article{1b88ec05d0324df8ab35435ba50a81c7,

title = "Molecular design of large-bandgap host materials and their application to blue phosphorescent organic light-emitting diodes",

abstract = "Abstract New large-bandgap host materials with carbazole and carboline moieties were designed and synthesized for high-performance blue phosphorescent organic light-emitting diodes (PhOLEDs). The two kinds of host materials, 9-(4-(9H-carbazol-9-yl)phenyl)-6-(9H-carbazol-9-yl)-9H-pyrido[2,3-b]indole (pP2CZCB) and 9-(3-(9H-carbazol-9-yl)phenyl)-6-(9H-carbazol-9-yl)-9H-pyrido[2,3-b]indole (mP2CZCB), displayed promisingly high triplet energies of ∼2.92-2.93 eV for enhancing the exothermic energy transfer to bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(III) (FIrpic) in PhOLED devices. It was found that the blue PhOLEDs bearing the new host materials and the FIrpic dopant exhibited markedly higher external quantum efficiencies (EQEs) than a device made with 1,3-bis(N-carbazolyl)benzene (mCP) as the host. In particular, the PhOLED device made with 3 wt% FIrpic as the dopant and mP2CZCB as the host material displayed a low driving voltage of 4.13 V and the high EQE of 25.3% at 1000 cd m-2.",

keywords = "Blue phosphorescence, Carbazole, Carboline, Host material, Organic light emitting diode",

author = "Kang, {Ju Sik} and Hong, {Tae Ryang} and Kim, {Hyung Jong} and Son, {Young Hoon} and Bin, {Jong Kwan} and Lee, {Bang Sook} and Yang, {Joong Hwan} and Kim, {Jin Wuk} and Cho, {Min Ju} and Kwon, {Jang Hyuk} and Choi, {Dong Hoon}",

note = "Funding Information: This research was supported by National Research Foundation of Korea ( NRF2012R1A2A1A01008797 ) and by Key Research Institute Program ( NRF201200020209 ). D.H. Choi particularly thank for the support from LG display Co. Limited (2013–2014). Publisher Copyright: {\textcopyright} 2015 Elsevier B.V. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.",

year = "2015",

month = jul,

day = "27",

doi = "10.1016/j.orgel.2015.07.020",

language = "English",

volume = "26",

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T1 - Molecular design of large-bandgap host materials and their application to blue phosphorescent organic light-emitting diodes

AU - Kang, Ju Sik

AU - Hong, Tae Ryang

AU - Kim, Hyung Jong

AU - Son, Young Hoon

AU - Bin, Jong Kwan

AU - Lee, Bang Sook

AU - Yang, Joong Hwan

AU - Kim, Jin Wuk

AU - Cho, Min Ju

AU - Kwon, Jang Hyuk

AU - Choi, Dong Hoon

N1 - Funding Information: This research was supported by National Research Foundation of Korea ( NRF2012R1A2A1A01008797 ) and by Key Research Institute Program ( NRF201200020209 ). D.H. Choi particularly thank for the support from LG display Co. Limited (2013–2014). Publisher Copyright: © 2015 Elsevier B.V. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.

PY - 2015/7/27

Y1 - 2015/7/27

N2 - Abstract New large-bandgap host materials with carbazole and carboline moieties were designed and synthesized for high-performance blue phosphorescent organic light-emitting diodes (PhOLEDs). The two kinds of host materials, 9-(4-(9H-carbazol-9-yl)phenyl)-6-(9H-carbazol-9-yl)-9H-pyrido[2,3-b]indole (pP2CZCB) and 9-(3-(9H-carbazol-9-yl)phenyl)-6-(9H-carbazol-9-yl)-9H-pyrido[2,3-b]indole (mP2CZCB), displayed promisingly high triplet energies of ∼2.92-2.93 eV for enhancing the exothermic energy transfer to bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(III) (FIrpic) in PhOLED devices. It was found that the blue PhOLEDs bearing the new host materials and the FIrpic dopant exhibited markedly higher external quantum efficiencies (EQEs) than a device made with 1,3-bis(N-carbazolyl)benzene (mCP) as the host. In particular, the PhOLED device made with 3 wt% FIrpic as the dopant and mP2CZCB as the host material displayed a low driving voltage of 4.13 V and the high EQE of 25.3% at 1000 cd m-2.

AB - Abstract New large-bandgap host materials with carbazole and carboline moieties were designed and synthesized for high-performance blue phosphorescent organic light-emitting diodes (PhOLEDs). The two kinds of host materials, 9-(4-(9H-carbazol-9-yl)phenyl)-6-(9H-carbazol-9-yl)-9H-pyrido[2,3-b]indole (pP2CZCB) and 9-(3-(9H-carbazol-9-yl)phenyl)-6-(9H-carbazol-9-yl)-9H-pyrido[2,3-b]indole (mP2CZCB), displayed promisingly high triplet energies of ∼2.92-2.93 eV for enhancing the exothermic energy transfer to bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(III) (FIrpic) in PhOLED devices. It was found that the blue PhOLEDs bearing the new host materials and the FIrpic dopant exhibited markedly higher external quantum efficiencies (EQEs) than a device made with 1,3-bis(N-carbazolyl)benzene (mCP) as the host. In particular, the PhOLED device made with 3 wt% FIrpic as the dopant and mP2CZCB as the host material displayed a low driving voltage of 4.13 V and the high EQE of 25.3% at 1000 cd m-2.

KW - Blue phosphorescence

KW - Carbazole

KW - Carboline

KW - Host material

KW - Organic light emitting diode

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Molecular design of large-bandgap host materials and their application to blue phosphorescent organic light-emitting diodes

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