Carbazole or carbazole-3-carbonitrile /pyridine host materials for efficient solution-processable blue phosphorescent and green TADF OLEDs

Chao Tang; Jianmei Chen; Zhenghua Zhu; Changdong Shao; Yong Wang; Youhua Chen; Zijie Zhu; Mingxuan Shi; Yue Jin; Hui Yang; Jiujuan Fu; Yuxin Han; Jiayi Hu; Fangfang Wang; Jia Hu; Xudong Cao; Yuhe Kan; Lili Zhang

doi:10.1016/j.optmat.2022.112573

Carbazole or carbazole-3-carbonitrile /pyridine host materials for efficient solution-processable blue phosphorescent and green TADF OLEDs

Chao Tang, Jianmei Chen, Zhenghua Zhu, Changdong Shao, Yong Wang, Youhua Chen, Zijie Zhu, Mingxuan Shi, Yue Jin, Hui Yang, Jiujuan Fu, Yuxin Han, Jiayi Hu, Fangfang Wang, Jia Hu, Xudong Cao, Yuhe Kan, Lili Zhang

SCHOOL OF FLEXIBLE ELECTRONICS(FUTURE TECHNOLOGIES)|INSTITUTE OF ADVANCED MATERIALS(IAM)

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

1 Scopus citations

Abstract

Two carbazole or carbazole-3-carbonitrile/pyridine-based bipolar materials were designed and synthesized as the hosts for solution-processed sky-blue PhOLEDs and green TADF-OLEDs. The solution-processed blue PhOLEDs based on 2,6-CzPy and CN-2,6-CzPy were fabricated exhibiting CE_max of 27.4, 14.0 cd A⁻¹ and PE_max of 11.1, 5.6 lm W⁻¹. Remarkably, the turn-on voltage (V_on) of device A and B based on 2,6-CzPy drops slightly, as the doping concentration increasing from 10% to 15%. The green TADF-OLED based on 2,6-CzPy shows CE_max of 10.6 cd A⁻¹, EQE of 3.0%. Although the rational introduction of cyano substituents can significantly upgrade the thermal stability of the hosts. T_g and T_d of CN-2,6-CzPy improved by 53 °C and 83 °C than 2,6-CzPy. Nevertheless, the introduction of cyano substituents leads to CN-2,6-CzPy exhibiting deeper HOMO and generating a large hole injection barrier is not conducive to improve device performance.

Original language	English
Article number	112573
Journal	Optical Materials
Volume	132
DOIs	https://doi.org/10.1016/j.optmat.2022.112573
State	Published - Oct 2022

Keywords

Carbazole-3-carbonitrile
Host/dopant
Organic light-emitting diodes
Solution-processed
Thermal activation delayed fluorescence

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10.1016/j.optmat.2022.112573

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Tang, C., Chen, J., Zhu, Z., Shao, C., Wang, Y., Chen, Y., Zhu, Z., Shi, M., Jin, Y., Yang, H., Fu, J., Han, Y., Hu, J., Wang, F., Hu, J., Cao, X., Kan, Y., & Zhang, L. (2022). Carbazole or carbazole-3-carbonitrile /pyridine host materials for efficient solution-processable blue phosphorescent and green TADF OLEDs. Optical Materials, 132, Article 112573. https://doi.org/10.1016/j.optmat.2022.112573

@article{af7466e209e047a78b26092c861cb09f,

title = "Carbazole or carbazole-3-carbonitrile /pyridine host materials for efficient solution-processable blue phosphorescent and green TADF OLEDs",

abstract = "Two carbazole or carbazole-3-carbonitrile/pyridine-based bipolar materials were designed and synthesized as the hosts for solution-processed sky-blue PhOLEDs and green TADF-OLEDs. The solution-processed blue PhOLEDs based on 2,6-CzPy and CN-2,6-CzPy were fabricated exhibiting CEmax of 27.4, 14.0 cd A−1 and PEmax of 11.1, 5.6 lm W−1. Remarkably, the turn-on voltage (Von) of device A and B based on 2,6-CzPy drops slightly, as the doping concentration increasing from 10% to 15%. The green TADF-OLED based on 2,6-CzPy shows CEmax of 10.6 cd A−1, EQE of 3.0%. Although the rational introduction of cyano substituents can significantly upgrade the thermal stability of the hosts. Tg and Td of CN-2,6-CzPy improved by 53 °C and 83 °C than 2,6-CzPy. Nevertheless, the introduction of cyano substituents leads to CN-2,6-CzPy exhibiting deeper HOMO and generating a large hole injection barrier is not conducive to improve device performance.",

keywords = "Carbazole-3-carbonitrile, Host/dopant, Organic light-emitting diodes, Solution-processed, Thermal activation delayed fluorescence",

author = "Chao Tang and Jianmei Chen and Zhenghua Zhu and Changdong Shao and Yong Wang and Youhua Chen and Zijie Zhu and Mingxuan Shi and Yue Jin and Hui Yang and Jiujuan Fu and Yuxin Han and Jiayi Hu and Fangfang Wang and Jia Hu and Xudong Cao and Yuhe Kan and Lili Zhang",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = oct,

doi = "10.1016/j.optmat.2022.112573",

language = "英语",

volume = "132",

journal = "Optical Materials",

issn = "0925-3467",

publisher = "Elsevier B.V.",

}

Tang, C, Chen, J, Zhu, Z, Shao, C, Wang, Y, Chen, Y, Zhu, Z, Shi, M, Jin, Y, Yang, H, Fu, J, Han, Y, Hu, J, Wang, F, Hu, J, Cao, X, Kan, Y & Zhang, L 2022, 'Carbazole or carbazole-3-carbonitrile /pyridine host materials for efficient solution-processable blue phosphorescent and green TADF OLEDs', Optical Materials, vol. 132, 112573. https://doi.org/10.1016/j.optmat.2022.112573

TY - JOUR

T1 - Carbazole or carbazole-3-carbonitrile /pyridine host materials for efficient solution-processable blue phosphorescent and green TADF OLEDs

AU - Tang, Chao

AU - Chen, Jianmei

AU - Zhu, Zhenghua

AU - Shao, Changdong

AU - Wang, Yong

AU - Chen, Youhua

AU - Zhu, Zijie

AU - Shi, Mingxuan

AU - Jin, Yue

AU - Yang, Hui

AU - Fu, Jiujuan

AU - Han, Yuxin

AU - Hu, Jiayi

AU - Wang, Fangfang

AU - Hu, Jia

AU - Cao, Xudong

AU - Kan, Yuhe

AU - Zhang, Lili

PY - 2022/10

Y1 - 2022/10

N2 - Two carbazole or carbazole-3-carbonitrile/pyridine-based bipolar materials were designed and synthesized as the hosts for solution-processed sky-blue PhOLEDs and green TADF-OLEDs. The solution-processed blue PhOLEDs based on 2,6-CzPy and CN-2,6-CzPy were fabricated exhibiting CEmax of 27.4, 14.0 cd A−1 and PEmax of 11.1, 5.6 lm W−1. Remarkably, the turn-on voltage (Von) of device A and B based on 2,6-CzPy drops slightly, as the doping concentration increasing from 10% to 15%. The green TADF-OLED based on 2,6-CzPy shows CEmax of 10.6 cd A−1, EQE of 3.0%. Although the rational introduction of cyano substituents can significantly upgrade the thermal stability of the hosts. Tg and Td of CN-2,6-CzPy improved by 53 °C and 83 °C than 2,6-CzPy. Nevertheless, the introduction of cyano substituents leads to CN-2,6-CzPy exhibiting deeper HOMO and generating a large hole injection barrier is not conducive to improve device performance.

AB - Two carbazole or carbazole-3-carbonitrile/pyridine-based bipolar materials were designed and synthesized as the hosts for solution-processed sky-blue PhOLEDs and green TADF-OLEDs. The solution-processed blue PhOLEDs based on 2,6-CzPy and CN-2,6-CzPy were fabricated exhibiting CEmax of 27.4, 14.0 cd A−1 and PEmax of 11.1, 5.6 lm W−1. Remarkably, the turn-on voltage (Von) of device A and B based on 2,6-CzPy drops slightly, as the doping concentration increasing from 10% to 15%. The green TADF-OLED based on 2,6-CzPy shows CEmax of 10.6 cd A−1, EQE of 3.0%. Although the rational introduction of cyano substituents can significantly upgrade the thermal stability of the hosts. Tg and Td of CN-2,6-CzPy improved by 53 °C and 83 °C than 2,6-CzPy. Nevertheless, the introduction of cyano substituents leads to CN-2,6-CzPy exhibiting deeper HOMO and generating a large hole injection barrier is not conducive to improve device performance.

KW - Carbazole-3-carbonitrile

KW - Host/dopant

KW - Organic light-emitting diodes

KW - Solution-processed

KW - Thermal activation delayed fluorescence

UR - http://www.scopus.com/inward/record.url?scp=85132712945&partnerID=8YFLogxK

U2 - 10.1016/j.optmat.2022.112573

DO - 10.1016/j.optmat.2022.112573

M3 - 文章

AN - SCOPUS:85132712945

SN - 0925-3467

VL - 132

JO - Optical Materials

JF - Optical Materials

M1 - 112573

ER -

Carbazole or carbazole-3-carbonitrile /pyridine host materials for efficient solution-processable blue phosphorescent and green TADF OLEDs

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Keywords

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