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Highly effective organic light-emitting diodes containing thermally activated delayed fluorescence emitters with horizontal molecular orientationopen access
- Authors
- Lee, Chan Hee; Choi, Shin Hyung; Oh, Sung Joon; Lee, Jun Hyeon; Shim, Jae Won; Adachi, Chihaya; Lee, Sae Youn
- Issue Date
- 26-Nov-2020
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- RSC ADVANCES, v.10, no.70, pp 42897 - 42902
- Pages
- 6
- Indexed
- SCIE
SCOPUS
- Journal Title
- RSC ADVANCES
- Volume
- 10
- Number
- 70
- Start Page
- 42897
- End Page
- 42902
- ISSN
- 2046-2069
2046-2069
- Abstract
- In this study, we report new thermally activated delayed fluorescence (TADF) emitters, AcPYM (10,10 '-(pyrimidine-2,5-diylbis(4,1-phenylene))bis(9,9-dimethyl-9,10-dihydroacridine)) and PxPYM (10,10 '-(pyrimidine-2,5-diylbis(4,1-phenylene))bis(10H-phenoxazine)), by employing donor units at the 2,5-positions of the pyrimidine acceptor unit. The donor-acceptor-donor (D-A-D) units combined in the linear molecular structure of AcPYM or PxPYM enhanced the horizontally oriented alignment, and the horizontal transition dipole moments were realized by up to 87% in the host matrix. Organic light-emitting diodes (OLEDs) containing AcPYM and PxPYM emitters realized external quantum efficiencies (eta(ext)) of 16.8% for blue and green emissions.
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Related Researcher
- Lee, Sae Youn
- College of Engineering (Department of Energy and Materials Engineering)