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Novel liquid crystalline organic semiconducting oligomers incorporating N-heterocyclic carbazole moieties for fluorescent OLEDs

Hu, Guang; Kitney, Stuart P.; Kelly, Stephen M.; Harrison, William; O’Neill, Mary

Authors

Guang Hu

Stuart P. Kitney

William Harrison

Mary O’Neill



Abstract

A novel class of nematic liquid crystalline organic semiconducting oligomers incorporating N-heterocyclic carbazole moieties has been synthesised using simple and highly efficient reaction pathways. The electroluminescent colour of these novel oligomers can be varied in a controlled manner by molecular design. The values of the ionisation potential and the electron affinity of these electroluminescent oligomers can also be matched by structural design to the Highest Occupied Molecular Orbital (HOMO) energy level of the electron-blocking layer and the Lowest Unoccupied Molecular Orbital (LUMO) energy level of electron-transporting layer in the Organic light emitting diodes to create low charge-injection barriers for electrons and holes, respectively leading to electroluminescence with an efficacy up to 4.1 cd A−1.

Citation

Hu, G., Kitney, S. P., Kelly, S. M., Harrison, W., & O’Neill, M. (2017). Novel liquid crystalline organic semiconducting oligomers incorporating N-heterocyclic carbazole moieties for fluorescent OLEDs. Liquid crystals, 44(11), 1632-1645. https://doi.org/10.1080/02678292.2017.1306633

Journal Article Type Article
Acceptance Date Mar 10, 2017
Online Publication Date Mar 23, 2017
Publication Date Sep 2, 2017
Deposit Date Sep 21, 2017
Publicly Available Date Mar 27, 2018
Journal Liquid crystals
Print ISSN 0267-8292
Electronic ISSN 1366-5855
Publisher Taylor and Francis
Peer Reviewed Peer Reviewed
Volume 44
Issue 11
Pages 1632-1645
DOI https://doi.org/10.1080/02678292.2017.1306633
Keywords Nematic liquid crystalline; Oligomers; Carbazole; Synthesis; Electroluminescent; OLED
Public URL https://hull-repository.worktribe.com/output/454928
Publisher URL http://www.tandfonline.com/doi/full/10.1080/02678292.2017.1306633
Related Public URLs http://irep.ntu.ac.uk/id/eprint/30575/
Additional Information This is the accepted manuscript of an article published in Liquid crystals,
2017. The version of record is available at the DOI link in this record.

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