Fluorescent pyrene-imidazole material for deep-blue organic light-emitting devices

Khurram Usman; Amjad Islam; Syed Hamad Ullah Shah; Kashif Javaid; Al Amin; Zeeshan Mustafa; Abdul Ghafar Wattoo; Nadeem Abbas; Ziyi Ge

doi:10.1016/j.optmat.2021.111582

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Fluorescent pyrene-imidazole material for deep-blue organic light-emitting devices

Journal article

Peer reviewed

Fluorescent pyrene-imidazole material for deep-blue organic light-emitting devices

Khurram Usman, Amjad Islam, Syed Hamad Ullah Shah, Kashif Javaid, Al Amin, Zeeshan Mustafa, Abdul Ghafar Wattoo, Nadeem Abbas and Ziyi Ge

Optical materials, Vol.121, p.111582

11/2021

DOI: https://doi.org/10.1016/j.optmat.2021.111582

Abstract

Deep-blue

Imidazole

Organic light-emitting devices

Pyrene

Thermal-stability

Numerous endeavors have been exerted to devise deep-blue light-emitting materials (LEMs) for organic light-emitting devices (OLEDs). Nevertheless, deep-blue light-emitting materials exhibiting high efficiency for simple-structured OLEDs are still scarce. Herein, a donor-acceptor based LEM, 4'-(4, 5-diphenyl-1-(3-(pyren-1-yl)phenyl)-1H-imidazole-2-yl)-N,N-diphenylbiphenyl-4-amine (TPA-PyI) is developed by merging imidazole, triphenyl-amine and pyrene units for OLEDs. TPA-PyI is used as the emitting layer in OLED device, which emits a deep-blue fluorescence at 444 nm. With a current efficiency (CE) of 3.05 cd/A and a power efficiency (PE) of 2.95 lm/W, an EQE of 2.97% is achieved. High thermal-stability is achieved with decomposition-temperature (Td) of 516 °C. [Display omitted] •Pyrene-Imidazole Based Material.•Fluorescent Material.•Deep-blue Emission.•Highly Stable Emitter.•Simple Structured OLED device.

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Title: Fluorescent pyrene-imidazole material for deep-blue organic light-emitting devices
Creators - without role: Khurram Usman - South China Normal University
Amjad Islam - Ningbo Institute of Industrial Technology
Syed Hamad Ullah Shah - Department of Materials Engineering, School of Chemical and Materials Engineering, National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan
Kashif Javaid - Ningbo Institute of Industrial Technology
Al Amin - Gyeongsang National University
Zeeshan Mustafa - Lahore Garrison University
Abdul Ghafar Wattoo - Khwaja Fareed University of Engineering and Information Technology
Nadeem Abbas - Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, PR China
Ziyi Ge - Ningbo Institute of Industrial Technology
Publication Details: Optical materials, Vol.121, p.111582
Publisher: Elsevier B.V
Identifiers: 9927392808331
Academic Unit: Prince Sultan University
Language: English
Resource Type: Journal article