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Updated: Dec 22, 2025

Development of Efficient OLEDs from Solution Deposition
Published on: November 4, 2022
Ancillary ligand increases the efficiency of heteroleptic Ir-based triplet emitters in OLED devices
Seung-Yeol Baek1,2, Seung-Yeon Kwak3, Seoung-Tae Kim1,2
1Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
Abstract:
The excellent contrast ratio, visibility, and advantages in producing thin and light displays let organic light emitting diodes change the paradigm of the display industry. To improve future display technologies, higher electroluminescence efficiency is needed. Herein, the detailed study of the non-radiative decay mechanism employing density functional theory calculations is carried out and a simple, general strategy for the design of the ancillary ligand is formulated. It is shown that steric bulk properly directed towards the phenylisoquinoline ligands can significantly reduce the non-radiative decay rate.
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