Ancillary ligand increases the efficiency of heteroleptic Ir-based triplet emitters in OLED devices.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 32385259.
- Also identified by DOI 10.1038/s41467-020-16091-1 and PMC identifier 7210992.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
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.