Two novel bipolar compounds based-on 1, 2, 4-triazol derivatives for non-doped deep-blue and green phosphorescent OLED applications

Kexiang Wang; Peng Sun; Huixia Xu; Jie Li; Fang Wang; Yanqin Miao; Tingting Yang; Hua Wang; Bingshe Xu; Wai Yeung Wong

doi:10.1016/j.dyepig.2017.03.069

Two novel bipolar compounds based-on 1, 2, 4-triazol derivatives for non-doped deep-blue and green phosphorescent OLED applications

Kexiang Wang, Peng Sun, Huixia Xu^*, Jie Li, Fang Wang, Yanqin Miao, Tingting Yang, Hua Wang, Bingshe Xu, Wai Yeung Wong

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

22 Citations (Scopus)

Abstract

Utilizing 2-(2-phenyl-2H-1,2,4-triazol-3-yl)pyridine (TAZ) as acceptor, two novel bipolar materials were designed and synthesized, one using triphenylamine (TPA) as donor and named as TAZ-TPA, and the second one using 9,9-diphenyl-9H-fluorene (DPPF) as donor and denoted as TAZ-DPPF. The different donors result in the various photophysical natures. The compound of TAZ-TPA possesses high thermal stabilities with a glass transition temperature (T_g) of 145 °C and shows a strong deep-blue emission at 435 nm in CH₂Cl₂ solution. The non-doped device utilizing TAZ-TPA as emitter exhibits excellent stability with the Commission Internation de L'Eclairage coordinates of (0.15, 0.05). The radiative exciton yield of 36% in TAZ-TPA device is obtained due to the occurrence of charge transfer and hybridized local and charge-transfer excited states. The PL spectrum of TAZ-DPPF locates in the ultraviolet range with the peaks at 384 and 377 nm, and only the local electron excited state is observed. The green phosphorescent OLED hosted by TAZ-DPPF has achieved the performance of the current efficiency at 45.0 cd/A.

Original language	English
Pages (from-to)	25-32
Number of pages	8
Journal	Dyes and Pigments
Volume	143
DOIs	https://doi.org/10.1016/j.dyepig.2017.03.069
Publication status	Published - 1 Aug 2017

Scopus Subject Areas

General Chemical Engineering
Process Chemistry and Technology

User-Defined Keywords

1, 2, 4-Triazol derivatives
Bipolar materials
Non-doped deep-blue OLEDs

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10.1016/j.dyepig.2017.03.069

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@article{12c8e9387a4a421187ac469f8291a0eb,

title = "Two novel bipolar compounds based-on 1, 2, 4-triazol derivatives for non-doped deep-blue and green phosphorescent OLED applications",

abstract = "Utilizing 2-(2-phenyl-2H-1,2,4-triazol-3-yl)pyridine (TAZ) as acceptor, two novel bipolar materials were designed and synthesized, one using triphenylamine (TPA) as donor and named as TAZ-TPA, and the second one using 9,9-diphenyl-9H-fluorene (DPPF) as donor and denoted as TAZ-DPPF. The different donors result in the various photophysical natures. The compound of TAZ-TPA possesses high thermal stabilities with a glass transition temperature (Tg) of 145 °C and shows a strong deep-blue emission at 435 nm in CH2Cl2 solution. The non-doped device utilizing TAZ-TPA as emitter exhibits excellent stability with the Commission Internation de L'Eclairage coordinates of (0.15, 0.05). The radiative exciton yield of 36% in TAZ-TPA device is obtained due to the occurrence of charge transfer and hybridized local and charge-transfer excited states. The PL spectrum of TAZ-DPPF locates in the ultraviolet range with the peaks at 384 and 377 nm, and only the local electron excited state is observed. The green phosphorescent OLED hosted by TAZ-DPPF has achieved the performance of the current efficiency at 45.0 cd/A.",

keywords = "1, 2, 4-Triazol derivatives, Bipolar materials, Non-doped deep-blue OLEDs",

author = "Kexiang Wang and Peng Sun and Huixia Xu and Jie Li and Fang Wang and Yanqin Miao and Tingting Yang and Hua Wang and Bingshe Xu and Wong, {Wai Yeung}",

note = "Funding Information: This work was financially supported by the International Science and Technology Cooperation Program of China (2012DFR50460); National Natural Scientific Foundation of China (21071108, 60976018, 61274056, 61205179, 61605138); Natural Science Foundation of Shanxi Province (2015021070); Program for Changjiang Scholar and Innovation Research Team in University (IRT0972); and Shanxi Provincial Key Innovative Research Team in Science and Technology (201513002-10).",

year = "2017",

month = aug,

day = "1",

doi = "10.1016/j.dyepig.2017.03.069",

language = "English",

volume = "143",

pages = "25--32",

journal = "Dyes and Pigments",

issn = "0143-7208",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Two novel bipolar compounds based-on 1, 2, 4-triazol derivatives for non-doped deep-blue and green phosphorescent OLED applications

AU - Wang, Kexiang

AU - Sun, Peng

AU - Xu, Huixia

AU - Li, Jie

AU - Wang, Fang

AU - Miao, Yanqin

AU - Yang, Tingting

AU - Wang, Hua

AU - Xu, Bingshe

AU - Wong, Wai Yeung

N1 - Funding Information: This work was financially supported by the International Science and Technology Cooperation Program of China (2012DFR50460); National Natural Scientific Foundation of China (21071108, 60976018, 61274056, 61205179, 61605138); Natural Science Foundation of Shanxi Province (2015021070); Program for Changjiang Scholar and Innovation Research Team in University (IRT0972); and Shanxi Provincial Key Innovative Research Team in Science and Technology (201513002-10).

PY - 2017/8/1

Y1 - 2017/8/1

N2 - Utilizing 2-(2-phenyl-2H-1,2,4-triazol-3-yl)pyridine (TAZ) as acceptor, two novel bipolar materials were designed and synthesized, one using triphenylamine (TPA) as donor and named as TAZ-TPA, and the second one using 9,9-diphenyl-9H-fluorene (DPPF) as donor and denoted as TAZ-DPPF. The different donors result in the various photophysical natures. The compound of TAZ-TPA possesses high thermal stabilities with a glass transition temperature (Tg) of 145 °C and shows a strong deep-blue emission at 435 nm in CH2Cl2 solution. The non-doped device utilizing TAZ-TPA as emitter exhibits excellent stability with the Commission Internation de L'Eclairage coordinates of (0.15, 0.05). The radiative exciton yield of 36% in TAZ-TPA device is obtained due to the occurrence of charge transfer and hybridized local and charge-transfer excited states. The PL spectrum of TAZ-DPPF locates in the ultraviolet range with the peaks at 384 and 377 nm, and only the local electron excited state is observed. The green phosphorescent OLED hosted by TAZ-DPPF has achieved the performance of the current efficiency at 45.0 cd/A.

AB - Utilizing 2-(2-phenyl-2H-1,2,4-triazol-3-yl)pyridine (TAZ) as acceptor, two novel bipolar materials were designed and synthesized, one using triphenylamine (TPA) as donor and named as TAZ-TPA, and the second one using 9,9-diphenyl-9H-fluorene (DPPF) as donor and denoted as TAZ-DPPF. The different donors result in the various photophysical natures. The compound of TAZ-TPA possesses high thermal stabilities with a glass transition temperature (Tg) of 145 °C and shows a strong deep-blue emission at 435 nm in CH2Cl2 solution. The non-doped device utilizing TAZ-TPA as emitter exhibits excellent stability with the Commission Internation de L'Eclairage coordinates of (0.15, 0.05). The radiative exciton yield of 36% in TAZ-TPA device is obtained due to the occurrence of charge transfer and hybridized local and charge-transfer excited states. The PL spectrum of TAZ-DPPF locates in the ultraviolet range with the peaks at 384 and 377 nm, and only the local electron excited state is observed. The green phosphorescent OLED hosted by TAZ-DPPF has achieved the performance of the current efficiency at 45.0 cd/A.

KW - 1, 2, 4-Triazol derivatives

KW - Bipolar materials

KW - Non-doped deep-blue OLEDs

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U2 - 10.1016/j.dyepig.2017.03.069

DO - 10.1016/j.dyepig.2017.03.069

M3 - Journal article

AN - SCOPUS:85017557908

SN - 0143-7208

VL - 143

SP - 25

EP - 32

JO - Dyes and Pigments

JF - Dyes and Pigments

ER -

Two novel bipolar compounds based-on 1, 2, 4-triazol derivatives for non-doped deep-blue and green phosphorescent OLED applications

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