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, JinWuk Kim, Min Ju Cho, Jang Hyuk Kwon, Dong Hoon Choi

Research output: Contribution to journalArticle

6 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-C<sup>2</sup>,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<sup>-2</sup>.

Original languageEnglish
Article number3182
Pages (from-to)218-224
Number of pages7
JournalOrganic Electronics: physics, materials, applications
Volume26
DOIs
Publication statusPublished - 2015 Jul 27

Fingerprint

Organic light emitting diodes (OLED)
Energy gap
light emitting diodes
indoles
Quantum efficiency
quantum efficiency
Bearings (structural)
Doping (additives)
Carbolines
Iridium
carbazoles
Benzene
iridium
Energy transfer
low voltage
energy transfer
benzene
Electric potential
indole
energy

Keywords

  • Blue phosphorescence
  • Carbazole
  • Carboline
  • Host material
  • Organic light emitting diode

ASJC Scopus subject areas

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

Cite this

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, JinWuk; Cho, Min Ju; Kwon, Jang Hyuk; Choi, Dong Hoon.

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

Research output: Contribution to journalArticle

Kang, Ju Sik ; Hong, Tae Ryang ; Kim, Hyung Jong ; Son, Young Hoon ; Bin, Jong Kwan ; Lee, Bang Sook ; Yang, Joong Hwan ; Kim, JinWuk ; Cho, Min Ju ; Kwon, Jang Hyuk ; Choi, Dong Hoon. / Molecular design of large-bandgap host materials and their application to blue phosphorescent organic light-emitting diodes. In: Organic Electronics: physics, materials, applications. 2015 ; Vol. 26. pp. 218-224.
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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.",
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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, JinWuk

AU - Cho, Min Ju

AU - Kwon, Jang Hyuk

AU - Choi, Dong Hoon

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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