Non-Doped Deep-Blue OLEDs Based on Carbazole-π-Imidazole Derivatives

In this work, we designed and synthesized four bipolar blue-emitting materials with carbazole, imidazole, and biphenyl as donor, acceptor, and p bridge, respectively. The twisted phenylimidazole acceptor leads to a wider band-gap and hence deeper blue emission than the conjugated phenanthrimidazole...

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Main Authors:	Pengfei Yu, Yin Xiao
Format:	Article
Language:	English
Published:	MDPI AG 2021-04-01
Series:	Materials
Subjects:	OLED deep-blue emission carbazole imidazole
Online Access:	https://www.mdpi.com/1996-1944/14/9/2349

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spelling	doaj-8ea5540e367a45cead58eb1cfbcb03bb2021-04-30T23:06:42ZengMDPI AGMaterials1996-19442021-04-01142349234910.3390/ma14092349Non-Doped Deep-Blue OLEDs Based on Carbazole-π-Imidazole DerivativesPengfei Yu0Yin Xiao1School of Chemical Engineering and Technology, Tianjin Engineering Research Center of Functional Fine Chemicals, Tianjin University, Tianjin 300072, ChinaSchool of Chemical Engineering and Technology, Tianjin Engineering Research Center of Functional Fine Chemicals, Tianjin University, Tianjin 300072, ChinaIn this work, we designed and synthesized four bipolar blue-emitting materials with carbazole, imidazole, and biphenyl as donor, acceptor, and p bridge, respectively. The twisted phenylimidazole acceptor leads to a wider band-gap and hence deeper blue emission than the conjugated phenanthrimidazole acceptor. For the substituents on the carbazole donor, the t-butyl group could prevent the intramolecular charge transfer (ICT) process more effectively than the methoxy group. A non-doped deep-blue organic light-emitting diodes (OLED) is obtained with CIE coordinates of (0.159, 0.080), a maximum luminance of 11364 cd/m<sup>2</sup>, and a maximum EQE of 4.43%.https://www.mdpi.com/1996-1944/14/9/2349OLEDdeep-blue emissioncarbazoleimidazole
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Pengfei Yu Yin Xiao
spellingShingle	Pengfei Yu Yin Xiao Non-Doped Deep-Blue OLEDs Based on Carbazole-π-Imidazole Derivatives Materials OLED deep-blue emission carbazole imidazole
author_facet	Pengfei Yu Yin Xiao
author_sort	Pengfei Yu
title	Non-Doped Deep-Blue OLEDs Based on Carbazole-π-Imidazole Derivatives
title_short	Non-Doped Deep-Blue OLEDs Based on Carbazole-π-Imidazole Derivatives
title_full	Non-Doped Deep-Blue OLEDs Based on Carbazole-π-Imidazole Derivatives
title_fullStr	Non-Doped Deep-Blue OLEDs Based on Carbazole-π-Imidazole Derivatives
title_full_unstemmed	Non-Doped Deep-Blue OLEDs Based on Carbazole-π-Imidazole Derivatives
title_sort	non-doped deep-blue oleds based on carbazole-π-imidazole derivatives
publisher	MDPI AG
series	Materials
issn	1996-1944
publishDate	2021-04-01
description	In this work, we designed and synthesized four bipolar blue-emitting materials with carbazole, imidazole, and biphenyl as donor, acceptor, and p bridge, respectively. The twisted phenylimidazole acceptor leads to a wider band-gap and hence deeper blue emission than the conjugated phenanthrimidazole acceptor. For the substituents on the carbazole donor, the t-butyl group could prevent the intramolecular charge transfer (ICT) process more effectively than the methoxy group. A non-doped deep-blue organic light-emitting diodes (OLED) is obtained with CIE coordinates of (0.159, 0.080), a maximum luminance of 11364 cd/m<sup>2</sup>, and a maximum EQE of 4.43%.
topic	OLED deep-blue emission carbazole imidazole
url	https://www.mdpi.com/1996-1944/14/9/2349
work_keys_str_mv	AT pengfeiyu nondopeddeepblueoledsbasedoncarbazolepimidazolederivatives AT yinxiao nondopeddeepblueoledsbasedoncarbazolepimidazolederivatives
_version_	1721497056297615360

Non-Doped Deep-Blue OLEDs Based on Carbazole-π-Imidazole Derivatives

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