New bipolar host materials for realizing blue phosphorescent organic light-emitting diodes with high efficiency at 1000 cd/m2

Min Ju Cho; Sun Jae Kim; Seung Hee Yoon; Jicheol Shin; Tae Ryang Hong; Hyung Jong Kim; Young Hoon Son; Ju Sik Kang; Hyun Ah Um; Tae Wan Lee; Jong Kwan Bin; Bang Sook Lee; Joong Hwan Yang; Gee Sung Chae; Jang Hyuk Kwon; Dong Hoon Choi

doi:10.1021/am505049h

New bipolar host materials for realizing blue phosphorescent organic light-emitting diodes with high efficiency at 1000 cd/m²

Min Ju Cho, Sun Jae Kim, Seung Hee Yoon, Jicheol Shin, Tae Ryang Hong, Hyung Jong Kim, Young Hoon Son, Ju Sik Kang, Hyun Ah Um, Tae Wan Lee, Jong Kwan Bin, Bang Sook Lee, Joong Hwan Yang, Gee Sung Chae, Jang Hyuk Kwon, Dong Hoon Choi

Department of Chemistry

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

40 Citations (Scopus)

Abstract

New host molecules such as 9-(6-(9 H-carbazol-9-yl)pyridin-3-yl)-6-(9 H-carbazol-9-yl)-9 H-pyrido[2,3-b]-indole (pPCB2CZ) and 9-(6-(9H-carbazol-9-yl)pyridin-2-yl)-6-(9 H -carbazol-9-yl)-9H -pyrido[2,3-b ]indole (mPCB2CZ) were designed and synthesized for blue phosphorescent organic light-emitting diodes (PhOLEDs). The glass transition temperatures of two host molecules were measured higher than 120 °C, and the identical triplet energies were determined to be 2.92 eV for both molecules. The bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl)iridium(III) (FIrpic)-doped mPCB2CZ-based PhOLED exhibited practically useful driving voltage of 4.8 V in a simple organic three layer device configuration which has a smaller number of interfaces in conventional multilayer PhOLEDs. Also, the high quantum efficiency of 23.7% is reported at the practically useful brightness value of 1000 cd/m². (Chemical Equation Presented).

Original language	English
Pages (from-to)	19808-19815
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	6
Issue number	22
DOIs	https://doi.org/10.1021/am505049h
Publication status	Published - 2014 Nov 26

Bibliographical note

Publisher Copyright:
© 2014 American Chemical Society.

Keywords

Bipolar host
Carboline
Organic light emitting diode
Phosphorescence
Quantum efficiency

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1021/am505049h

Cite this

Cho, M. J., Kim, S. J., Yoon, S. H., Shin, J., Hong, T. R., Kim, H. J., Son, Y. H., Kang, J. S., Um, H. A., Lee, T. W., Bin, J. K., Lee, B. S., Yang, J. H., Chae, G. S., Kwon, J. H., & Choi, D. H. (2014). New bipolar host materials for realizing blue phosphorescent organic light-emitting diodes with high efficiency at 1000 cd/m². ACS Applied Materials and Interfaces, 6(22), 19808-19815. https://doi.org/10.1021/am505049h

Cho, MJ, Kim, SJ, Yoon, SH, Shin, J, Hong, TR, Kim, HJ, Son, YH, Kang, JS, Um, HA, Lee, TW, Bin, JK, Lee, BS, Yang, JH, Chae, GS, Kwon, JH & Choi, DH 2014, 'New bipolar host materials for realizing blue phosphorescent organic light-emitting diodes with high efficiency at 1000 cd/m²', ACS Applied Materials and Interfaces, vol. 6, no. 22, pp. 19808-19815. https://doi.org/10.1021/am505049h

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title = "New bipolar host materials for realizing blue phosphorescent organic light-emitting diodes with high efficiency at 1000 cd/m2",

abstract = "New host molecules such as 9-(6-(9 H-carbazol-9-yl)pyridin-3-yl)-6-(9 H-carbazol-9-yl)-9 H-pyrido[2,3-b]-indole (pPCB2CZ) and 9-(6-(9H-carbazol-9-yl)pyridin-2-yl)-6-(9 H -carbazol-9-yl)-9H -pyrido[2,3-b ]indole (mPCB2CZ) were designed and synthesized for blue phosphorescent organic light-emitting diodes (PhOLEDs). The glass transition temperatures of two host molecules were measured higher than 120 °C, and the identical triplet energies were determined to be 2.92 eV for both molecules. The bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl)iridium(III) (FIrpic)-doped mPCB2CZ-based PhOLED exhibited practically useful driving voltage of 4.8 V in a simple organic three layer device configuration which has a smaller number of interfaces in conventional multilayer PhOLEDs. Also, the high quantum efficiency of 23.7% is reported at the practically useful brightness value of 1000 cd/m2. (Chemical Equation Presented).",

keywords = "Bipolar host, Carboline, Organic light emitting diode, Phosphorescence, Quantum efficiency",

author = "Cho, {Min Ju} and Kim, {Sun Jae} and Yoon, {Seung Hee} and Jicheol Shin and Hong, {Tae Ryang} and Kim, {Hyung Jong} and Son, {Young Hoon} and Kang, {Ju Sik} and Um, {Hyun Ah} and Lee, {Tae Wan} and Bin, {Jong Kwan} and Lee, {Bang Sook} and Yang, {Joong Hwan} and Chae, {Gee Sung} and Kwon, {Jang Hyuk} and Choi, {Dong Hoon}",

note = "Publisher Copyright: {\textcopyright} 2014 American Chemical Society.",

year = "2014",

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day = "26",

doi = "10.1021/am505049h",

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T1 - New bipolar host materials for realizing blue phosphorescent organic light-emitting diodes with high efficiency at 1000 cd/m2

AU - Cho, Min Ju

AU - Kim, Sun Jae

AU - Yoon, Seung Hee

AU - Shin, Jicheol

AU - Hong, Tae Ryang

AU - Kim, Hyung Jong

AU - Son, Young Hoon

AU - Kang, Ju Sik

AU - Um, Hyun Ah

AU - Lee, Tae Wan

AU - Bin, Jong Kwan

AU - Lee, Bang Sook

AU - Yang, Joong Hwan

AU - Chae, Gee Sung

AU - Kwon, Jang Hyuk

AU - Choi, Dong Hoon

PY - 2014/11/26

Y1 - 2014/11/26

N2 - New host molecules such as 9-(6-(9 H-carbazol-9-yl)pyridin-3-yl)-6-(9 H-carbazol-9-yl)-9 H-pyrido[2,3-b]-indole (pPCB2CZ) and 9-(6-(9H-carbazol-9-yl)pyridin-2-yl)-6-(9 H -carbazol-9-yl)-9H -pyrido[2,3-b ]indole (mPCB2CZ) were designed and synthesized for blue phosphorescent organic light-emitting diodes (PhOLEDs). The glass transition temperatures of two host molecules were measured higher than 120 °C, and the identical triplet energies were determined to be 2.92 eV for both molecules. The bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl)iridium(III) (FIrpic)-doped mPCB2CZ-based PhOLED exhibited practically useful driving voltage of 4.8 V in a simple organic three layer device configuration which has a smaller number of interfaces in conventional multilayer PhOLEDs. Also, the high quantum efficiency of 23.7% is reported at the practically useful brightness value of 1000 cd/m2. (Chemical Equation Presented).

AB - New host molecules such as 9-(6-(9 H-carbazol-9-yl)pyridin-3-yl)-6-(9 H-carbazol-9-yl)-9 H-pyrido[2,3-b]-indole (pPCB2CZ) and 9-(6-(9H-carbazol-9-yl)pyridin-2-yl)-6-(9 H -carbazol-9-yl)-9H -pyrido[2,3-b ]indole (mPCB2CZ) were designed and synthesized for blue phosphorescent organic light-emitting diodes (PhOLEDs). The glass transition temperatures of two host molecules were measured higher than 120 °C, and the identical triplet energies were determined to be 2.92 eV for both molecules. The bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl)iridium(III) (FIrpic)-doped mPCB2CZ-based PhOLED exhibited practically useful driving voltage of 4.8 V in a simple organic three layer device configuration which has a smaller number of interfaces in conventional multilayer PhOLEDs. Also, the high quantum efficiency of 23.7% is reported at the practically useful brightness value of 1000 cd/m2. (Chemical Equation Presented).

KW - Bipolar host

KW - Carboline

KW - Organic light emitting diode

KW - Phosphorescence

KW - Quantum efficiency

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