Luminescent columnar discotics as highly efficient emitters in pure deep-blue OLEDs with an external quantum efficiency of 4.7

Development of materials that serve as efficient blue emitters in solution-processable OLEDs is challenging. In this study, we report three derivatives of C 3 -symmetric 1,3,5-tris(thien-2-yl)benzene-based highly luminescent room temperature columnar discotic liquid crystals (DLCs) suitable as solid...

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Bibliographic Details
Published in:Soft matter 2022-06, Vol.18 (22), p.4214-4219
Main Authors: De, Joydip, Sarkar, Ishan, Yadav, Rohit Ashok Kumar, Bala, Indu, Gupta, Santosh Prasad, Siddiqui, Iram, Jou, Jwo-Huei, Pal, Santanu Kumar
Format: Article
Language:English
Subjects:
Benzene
Chromaticity
Crystals
Emitters
Liquid crystals
Photoluminescence
Photons
Quantum efficiency
Room temperature
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Summary:Development of materials that serve as efficient blue emitters in solution-processable OLEDs is challenging. In this study, we report three derivatives of C 3 -symmetric 1,3,5-tris(thien-2-yl)benzene-based highly luminescent room temperature columnar discotic liquid crystals (DLCs) suitable as solid-state emitters in OLED devices. When employed in solution-processed OLEDs, one of the derivatives having the highest photoluminescence quantum yield exhibited a maximum EQE of 4.7% and CIE chromaticity of (0.16, 0.05) corresponding to the ultra deep-blue emission. The finding is sufficiently significant in the field of DLC-based deep blue emitters. Development of luminescent room temperature columnar discotic liquid crystals as efficient deep-blue emitters in solution-processable OLEDs.
ISSN:1744-683X
1744-6848
DOI:10.1039/d1sm01558c