Highly efficient soluble materials for blue phosphorescent organic light-emitting diode

Nam Jin Lee; Dae Hee Lee; Dong Won Kim; Ji Hoon Lee; Sang Hee Cho; Woo Sik Jeon; Jang Hyuk Kwon; Min Chul Suh

doi:10.1016/j.dyepig.2012.04.011

Highly efficient soluble materials for blue phosphorescent organic light-emitting diode

Nam Jin Lee, Dae Hee Lee, Dong Won Kim, Ji Hoon Lee, Sang Hee Cho, Woo Sik Jeon, Jang Hyuk Kwon, Min Chul Suh

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

22 Citations (Scopus)

Abstract

A series of new carbazole derivatives with good solubility and electronic properties for use as host materials for blue phosphorescent organic light-emitting diodes is reported. A twisted biphenyl moiety at the center of the host materials was applied to enhance the solubility as well as triplet energies. Hence all the molecules showed good solubility as well as a fairly large triplet energy up to 3.01 eV. Blue phosphorescent devices employing bis(4,6-difluorophenylpyridinato-N,C2)picolinatoiridium (III) as the guest and the three new twisted carbazole derivatives as co-hosts with an electron type host material exhibited high efficiencies, up to 20.7 cd/A as a maximum current efficiency and 12.5% of external quantum efficiency. This performance was much improved by ∼27.6%, compared to that measured for the 1,3-di(9H-carbazol-9- yl)benzene: 2,6-bis(3-(9H-carbozol-9-yl)phenyl)pyridine reference system.

Original language	English
Pages (from-to)	221-228
Number of pages	8
Journal	Dyes and Pigments
Volume	95
Issue number	2
DOIs	https://doi.org/10.1016/j.dyepig.2012.04.011
Publication status	Published - Nov 2012

Bibliographical note

Funding Information:
Prof. J.-H. Lee acknowledges to Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (Grant No. NRF-2010-0012463 ). Prof. M. C. Suh gratefully acknowledges to Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (Grant No. NRF-2011-0006847 ). High resolution mass spectroscopy was carried out at Korea Basic Science Institute (Mass Spectrometry Research Team).

Keywords

Blue phosphorescent OLED
Carbazole
High triplet energy
Soluble host materials
Sterically bulky side groups

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10.1016/j.dyepig.2012.04.011

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title = "Highly efficient soluble materials for blue phosphorescent organic light-emitting diode",

abstract = "A series of new carbazole derivatives with good solubility and electronic properties for use as host materials for blue phosphorescent organic light-emitting diodes is reported. A twisted biphenyl moiety at the center of the host materials was applied to enhance the solubility as well as triplet energies. Hence all the molecules showed good solubility as well as a fairly large triplet energy up to 3.01 eV. Blue phosphorescent devices employing bis(4,6-difluorophenylpyridinato-N,C2)picolinatoiridium (III) as the guest and the three new twisted carbazole derivatives as co-hosts with an electron type host material exhibited high efficiencies, up to 20.7 cd/A as a maximum current efficiency and 12.5% of external quantum efficiency. This performance was much improved by ∼27.6%, compared to that measured for the 1,3-di(9H-carbazol-9- yl)benzene: 2,6-bis(3-(9H-carbozol-9-yl)phenyl)pyridine reference system.",

keywords = "Blue phosphorescent OLED, Carbazole, High triplet energy, Soluble host materials, Sterically bulky side groups",

author = "Lee, {Nam Jin} and Lee, {Dae Hee} and Kim, {Dong Won} and Lee, {Ji Hoon} and Cho, {Sang Hee} and Jeon, {Woo Sik} and Kwon, {Jang Hyuk} and Suh, {Min Chul}",

note = "Funding Information: Prof. J.-H. Lee acknowledges to Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (Grant No. NRF-2010-0012463 ). Prof. M. C. Suh gratefully acknowledges to Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (Grant No. NRF-2011-0006847 ). High resolution mass spectroscopy was carried out at Korea Basic Science Institute (Mass Spectrometry Research Team).",

year = "2012",

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doi = "10.1016/j.dyepig.2012.04.011",

language = "English",

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T1 - Highly efficient soluble materials for blue phosphorescent organic light-emitting diode

AU - Lee, Nam Jin

AU - Lee, Dae Hee

AU - Kim, Dong Won

AU - Lee, Ji Hoon

AU - Cho, Sang Hee

AU - Jeon, Woo Sik

AU - Kwon, Jang Hyuk

AU - Suh, Min Chul

N1 - Funding Information: Prof. J.-H. Lee acknowledges to Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (Grant No. NRF-2010-0012463 ). Prof. M. C. Suh gratefully acknowledges to Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (Grant No. NRF-2011-0006847 ). High resolution mass spectroscopy was carried out at Korea Basic Science Institute (Mass Spectrometry Research Team).

PY - 2012/11

Y1 - 2012/11

N2 - A series of new carbazole derivatives with good solubility and electronic properties for use as host materials for blue phosphorescent organic light-emitting diodes is reported. A twisted biphenyl moiety at the center of the host materials was applied to enhance the solubility as well as triplet energies. Hence all the molecules showed good solubility as well as a fairly large triplet energy up to 3.01 eV. Blue phosphorescent devices employing bis(4,6-difluorophenylpyridinato-N,C2)picolinatoiridium (III) as the guest and the three new twisted carbazole derivatives as co-hosts with an electron type host material exhibited high efficiencies, up to 20.7 cd/A as a maximum current efficiency and 12.5% of external quantum efficiency. This performance was much improved by ∼27.6%, compared to that measured for the 1,3-di(9H-carbazol-9- yl)benzene: 2,6-bis(3-(9H-carbozol-9-yl)phenyl)pyridine reference system.

AB - A series of new carbazole derivatives with good solubility and electronic properties for use as host materials for blue phosphorescent organic light-emitting diodes is reported. A twisted biphenyl moiety at the center of the host materials was applied to enhance the solubility as well as triplet energies. Hence all the molecules showed good solubility as well as a fairly large triplet energy up to 3.01 eV. Blue phosphorescent devices employing bis(4,6-difluorophenylpyridinato-N,C2)picolinatoiridium (III) as the guest and the three new twisted carbazole derivatives as co-hosts with an electron type host material exhibited high efficiencies, up to 20.7 cd/A as a maximum current efficiency and 12.5% of external quantum efficiency. This performance was much improved by ∼27.6%, compared to that measured for the 1,3-di(9H-carbazol-9- yl)benzene: 2,6-bis(3-(9H-carbozol-9-yl)phenyl)pyridine reference system.

KW - Blue phosphorescent OLED

KW - Carbazole

KW - High triplet energy

KW - Soluble host materials

KW - Sterically bulky side groups

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DO - 10.1016/j.dyepig.2012.04.011

M3 - Article

AN - SCOPUS:84861391926

SN - 0143-7208

VL - 95

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EP - 228

JO - Dyes and Pigments

JF - Dyes and Pigments

IS - 2

ER -

Highly efficient soluble materials for blue phosphorescent organic light-emitting diode

Abstract

Bibliographical note

Keywords

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