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 language | English |
|---|---|
| Article number | 3182 |
| Pages (from-to) | 218-224 |
| Number of pages | 7 |
| Journal | Organic Electronics: physics, materials, applications |
| Volume | 26 |
| DOIs | |
| Publication status | Published - 2015 Jul 27 |
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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 journal › Article
}
TY - JOUR
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
UR - http://www.scopus.com/inward/record.url?scp=84938063667&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84938063667&partnerID=8YFLogxK
U2 - 10.1016/j.orgel.2015.07.020
DO - 10.1016/j.orgel.2015.07.020
M3 - Article
AN - SCOPUS:84938063667
VL - 26
SP - 218
EP - 224
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
SN - 1566-1199
M1 - 3182
ER -