A novel D-π-A blue fluorophore based on [1,2,4]triazolo[1,5-a]pyridine as electron acceptor and its application in organic light-emitting diodes

Chen Cao; Wen-Cheng Chen; Shuang Tian; Jia-Xiong Chen; Zhong-Yi Wang; Xu-Hui Zheng; Chong-Wei Ding; Jing-Hong Li; Jie-Ji Zhu; Ze-Lin Zhu; Qing-Xiao Tong; Chun-Sing Lee

doi:10.1039/C8QM00678D

A novel D-π-A blue fluorophore based on [1,2,4]triazolo[1,5-a]pyridine as electron acceptor and its application in organic light-emitting diodes

Chen Cao, Wen-Cheng Chen^*, Shuang Tian, Jia-Xiong Chen, Zhong-Yi Wang, Xu-Hui Zheng, Chong-Wei Ding, Jing-Hong Li, Jie-Ji Zhu, Ze-Lin Zhu, Qing-Xiao Tong^*, Chun-Sing Lee^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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Abstract

[1,2,4]triazolo[1,5-a]pyridine (TP) is employed as a novel electron acceptor to construct a deep-blue bipolar fluorescent emitter (TPP-PPI) for the first time. Single crystals of TPP-PPI show a special packing mode which may provide a carrier transport channel. TPP-PPI has a high photoluminescence quantum yield of 97.5% in neat film. Non-doped organic light emitting diodes (OLEDs) with the new compound as emitter exhibits a high-performance deep-blue emission with an external quantum efficiency (EQE) of 6.05% and CIE coordinates of (0.15, 0.11) at 1000 cd m^-2. The doped devices based on TPP-PPI shows comparable performances and better deep-blue color purities. A 20 wt% TPP-PPI based OLED displays an EQE_max of 6.34% and a color index of (0.15, 0.06), satisfying European Broadcasting Union blue color standard. Furthermore, the high triplet energy (2.33 eV) allows TPP-PPI to be used as a host for PO-01 phosphor to realize high performance range phosphorescent OLED (EQE_max= 24.7%).

Original language	English
Pages (from-to)	1071-1079
Journal	Materials Chemistry Frontiers
Volume	3
Issue number	6
Online published	30 Mar 2019
DOIs	https://doi.org/10.1039/C8QM00678D
Publication status	Published - 1 Jun 2019

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COPYRIGHT TERMS OF DEPOSITED POSTPRINT FILE: This journal is © The Partner Organisations 2019. This is the accepted version of a paper published in Materials Chemistry Frontiers. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination. Cao, C., Chen, W.-C., Tian, S., Chen, J.-X., Wang, Z.-Y., Zheng, X.-H., Ding, C.-W., Li, J.-H., Zhu, J.-J., Zhu, Z.-L., Tong, Q.-X., & Lee, C.-S. (2019). A novel D-π-A blue fluorophore based on [1,2,4]triazolo[1,5-a]pyridine as electron acceptor and its application in organic light-emitting diodes. Materials Chemistry Frontiers, 3(6), 1071-1079. https://doi.org/10.1039/C8QM00678D

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Cao, C., Chen, W.-C., Tian, S., Chen, J.-X., Wang, Z.-Y., Zheng, X.-H., Ding, C.-W., Li, J.-H., Zhu, J.-J., Zhu, Z.-L., Tong, Q.-X., & Lee, C.-S. (2019). A novel D-π-A blue fluorophore based on [1,2,4]triazolo[1,5-a]pyridine as electron acceptor and its application in organic light-emitting diodes. Materials Chemistry Frontiers, 3(6), 1071-1079. https://doi.org/10.1039/C8QM00678D

@article{9560e58c6b914239b1e4f7dcf46e280c,

title = "A novel D-π-A blue fluorophore based on [1,2,4]triazolo[1,5-a]pyridine as electron acceptor and its application in organic light-emitting diodes",

abstract = "[1,2,4]triazolo[1,5-a]pyridine (TP) is employed as a novel electron acceptor to construct a deep-blue bipolar fluorescent emitter (TPP-PPI) for the first time. Single crystals of TPP-PPI show a special packing mode which may provide a carrier transport channel. TPP-PPI has a high photoluminescence quantum yield of 97.5% in neat film. Non-doped organic light emitting diodes (OLEDs) with the new compound as emitter exhibits a high-performance deep-blue emission with an external quantum efficiency (EQE) of 6.05% and CIE coordinates of (0.15, 0.11) at 1000 cd m-2. The doped devices based on TPP-PPI shows comparable performances and better deep-blue color purities. A 20 wt% TPP-PPI based OLED displays an EQEmax of 6.34% and a color index of (0.15, 0.06), satisfying European Broadcasting Union blue color standard. Furthermore, the high triplet energy (2.33 eV) allows TPP-PPI to be used as a host for PO-01 phosphor to realize high performance range phosphorescent OLED (EQEmax = 24.7%).",

author = "Chen Cao and Wen-Cheng Chen and Shuang Tian and Jia-Xiong Chen and Zhong-Yi Wang and Xu-Hui Zheng and Chong-Wei Ding and Jing-Hong Li and Jie-Ji Zhu and Ze-Lin Zhu and Qing-Xiao Tong and Chun-Sing Lee",

year = "2019",

month = jun,

day = "1",

doi = "10.1039/C8QM00678D",

language = "English",

volume = "3",

pages = "1071--1079",

number = "6",

}

Cao, C , Chen, W-C , Tian, S, Chen, J-X, Wang, Z-Y, Zheng, X-H, Ding, C-W, Li, J-H, Zhu, J-J, Zhu, Z-L, Tong, Q-X & Lee, C-S 2019, 'A novel D-π-A blue fluorophore based on [1,2,4]triazolo[1,5-a]pyridine as electron acceptor and its application in organic light-emitting diodes', Materials Chemistry Frontiers, vol. 3, no. 6, pp. 1071-1079. https://doi.org/10.1039/C8QM00678D

A novel D-π-A blue fluorophore based on [1,2,4]triazolo[1,5-a]pyridine as electron acceptor and its application in organic light-emitting diodes. / Cao, Chen ; Chen, Wen-Cheng ; Tian, Shuang et al.
In: Materials Chemistry Frontiers, Vol. 3, No. 6, 01.06.2019, p. 1071-1079.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - A novel D-π-A blue fluorophore based on [1,2,4]triazolo[1,5-a]pyridine as electron acceptor and its application in organic light-emitting diodes

AU - Cao, Chen

AU - Chen, Wen-Cheng

AU - Tian, Shuang

AU - Chen, Jia-Xiong

AU - Wang, Zhong-Yi

AU - Zheng, Xu-Hui

AU - Ding, Chong-Wei

AU - Li, Jing-Hong

AU - Zhu, Jie-Ji

AU - Zhu, Ze-Lin

AU - Tong, Qing-Xiao

AU - Lee, Chun-Sing

PY - 2019/6/1

Y1 - 2019/6/1

N2 - [1,2,4]triazolo[1,5-a]pyridine (TP) is employed as a novel electron acceptor to construct a deep-blue bipolar fluorescent emitter (TPP-PPI) for the first time. Single crystals of TPP-PPI show a special packing mode which may provide a carrier transport channel. TPP-PPI has a high photoluminescence quantum yield of 97.5% in neat film. Non-doped organic light emitting diodes (OLEDs) with the new compound as emitter exhibits a high-performance deep-blue emission with an external quantum efficiency (EQE) of 6.05% and CIE coordinates of (0.15, 0.11) at 1000 cd m-2. The doped devices based on TPP-PPI shows comparable performances and better deep-blue color purities. A 20 wt% TPP-PPI based OLED displays an EQEmax of 6.34% and a color index of (0.15, 0.06), satisfying European Broadcasting Union blue color standard. Furthermore, the high triplet energy (2.33 eV) allows TPP-PPI to be used as a host for PO-01 phosphor to realize high performance range phosphorescent OLED (EQEmax = 24.7%).

AB - [1,2,4]triazolo[1,5-a]pyridine (TP) is employed as a novel electron acceptor to construct a deep-blue bipolar fluorescent emitter (TPP-PPI) for the first time. Single crystals of TPP-PPI show a special packing mode which may provide a carrier transport channel. TPP-PPI has a high photoluminescence quantum yield of 97.5% in neat film. Non-doped organic light emitting diodes (OLEDs) with the new compound as emitter exhibits a high-performance deep-blue emission with an external quantum efficiency (EQE) of 6.05% and CIE coordinates of (0.15, 0.11) at 1000 cd m-2. The doped devices based on TPP-PPI shows comparable performances and better deep-blue color purities. A 20 wt% TPP-PPI based OLED displays an EQEmax of 6.34% and a color index of (0.15, 0.06), satisfying European Broadcasting Union blue color standard. Furthermore, the high triplet energy (2.33 eV) allows TPP-PPI to be used as a host for PO-01 phosphor to realize high performance range phosphorescent OLED (EQEmax = 24.7%).

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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85066608238&origin=recordpage

U2 - 10.1039/C8QM00678D

DO - 10.1039/C8QM00678D

M3 - RGC 21 - Publication in refereed journal

SN - 2052-1537

VL - 3

SP - 1071

EP - 1079

JO - Materials Chemistry Frontiers

JF - Materials Chemistry Frontiers

IS - 6

ER -

A novel D-π-A blue fluorophore based on [1,2,4]triazolo[1,5-a]pyridine as electron acceptor and its application in organic light-emitting diodes

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