Anais do Workshop INEO 2023

COLUMNAR LIQUID CRYSTAL AS ALIGNING HOST FOR EMISSIVE MOLECULES IN OLEDS

Published in 12/12/2023 - ISBN: 978-65-272-0088-8

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Submission
Paper Title
COLUMNAR LIQUID CRYSTAL AS ALIGNING HOST FOR EMISSIVE MOLECULES IN OLEDS
Authors
  • Feik Amil de Campos Junior
  • Feik Amil
  • C. H. Stadtlober (DR); USFC
  • Ivan H Bechtold
  • Juliana Eccher
Modality
Pôster
Subject area
Dispositivos eletrônicos e ópticos (OLED/OFET/OPVs/etc.)
Publishing Date
12/12/2023
Country of Publishing
Brasil
Language of Publishing
en-US
Paper Page
https://www.even3.com.br/anais/workshop-do-ineo-2023/613025-columnar-liquid-crystal-as-aligning-host-for-emissive-molecules-in-oleds
ISBN
978-65-272-0088-8
Keywords
Columnar liquid crystal (ColLC), organic light emitting diodes (OLEDs), molecular alignment
Summary
The latest advances with organic semiconductors have provided competitive optoelectronic devices with new functionalities, as observed for organic light emitting diodes (OLEDs), organic field effect transistors (OFETs), organic photovoltaics (OPVs) and sensors. The efficiency of these devices depends directly on the molecular ordering achieved by the active layer, since higher order improves charge transport, energy conversion and light outcoupling. In this sense, self-organizing molecules, such as liquid-crystalline materials, effectively play a role in this field. In a previous work, we demonstrated that the molecular alignment of a columnar liquid crystal (ColLC) in a diode structure improved the charge carrier mobility in five orders of magnitude and allowed electroluminescence emission [1]. Here, we investigate a triazine-based ColLC as aligning host for emissive molecules to be applied in the active layer of OLEDs, based on a work where we demonstrated the potential of the photophysical properties of liquid-crystalline triazine-based molecules for alignment-induced enhancement of light outcoupling [2]. As guest emissive molecule we investigated a thermally activated delayed fluorescent compound, which absorption band overlaps with the emission peak of the triazine-based host in order to optimize energy transfer [3]. The photophysical studies demonstrated that for 10.0 wt% concentration of the guest, the host emission is totally converted to the guest with increasing of the photoluminescence quantum yield, which is also influenced by the molecular organization of the medium. Acknowledgements: INCT/INEO, Capes, CNPq, CAPES-COFECUB (#937/20 and # Ph-C 962/20) and H2020-MSCA-RISE-2017 (OCTA, #778158). [1] J. Eccher, W. Zajaczkowski, GC Faria, H. Bock, H Von Seggern, W. Pisula, IH Bechtold. ACS Applied Materials & Interfaces (Print), 7, 16374-16381, 2015. [2] André A. Vieira, Giliandro Farias, Wallison C. Costa, Juliana Eccher, Ivan H. Bechtold, Fabien Durola, and Harald Bock. Chem. Eur. J., 27, 9003– 9010, 2021. [3] Shipan Wang, Yang Miao, Xianju Yan, Kaiqi Ye and Yue Wang. Journal of Materials Chemistry C, 6(25), 6698-6704, 2018.
Title of the Event
Workshop do INEO 2023
City of the Event
Nazaré Paulista
Title of the Proceedings of the event
Anais do Workshop INEO 2023
Name of the Publisher
Even3
Means of Dissemination
Meio Digital

How to cite

JUNIOR, Feik Amil de Campos et al.. COLUMNAR LIQUID CRYSTAL AS ALIGNING HOST FOR EMISSIVE MOLECULES IN OLEDS.. In: Anais do workshop INEO 2023. Anais...Nazaré Paulista(SP) Hotel Estância Atibainha, 2023. Available in: https//www.even3.com.br/anais/workshop-do-ineo-2023/613025-COLUMNAR-LIQUID-CRYSTAL-AS-ALIGNING-HOST-FOR-EMISSIVE-MOLECULES-IN-OLEDS. Access in: 04/05/2026

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