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Dual Mode Radiative Transition from a Phenoselenazine Derivative and Electrical Switching of the Emission Mechanism

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Title
Dual Mode Radiative Transition from a Phenoselenazine Derivative and Electrical Switching of the Emission Mechanism
Author(s)
Cho Long Kim; Jinhoon Jeong; Dong Ryun Lee; Ho Jin Jang; Seoung-Tae Kim; Mu-Hyun Baik; Jun Yeob Lee
Subject
ACTIVATED DELAYED FLUORESCENCE, ; LIGHT-EMITTING-DIODES, ; ROOM-TEMPERATURE PHOSPHORESCENCE, ; DENSITY-FUNCTIONAL THEORY, ; CHARGE-TRANSFER, ; STRUCTURAL-CHANGE, ; EFFICIENCY, ; COMPLEXES, ; DESIGN, ; DFT
Publication Date
2020-07
Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v.11, no.14, pp.5591 - 5600
Publisher
AMER CHEMICAL SOC
Abstract
© 2020 American Chemical Society Dual emission featuring both thermally activated delayed fluorescence (TADF) and phosphorescence was engineered into a single metal-free molecule, phenyl(10-phenyl-10H-phenoselenazin-3-yl)methanone. Selenium incorporated into the molecule increases the spin-orbit coupling to facilitate both TADF and phosphorescence, whereas donor-acceptor units promote TADF emission. The relative contribution of the green TADF and yellow phosphorescence can be controlled by the driving voltage of the devices. At low voltage, phosphorescence emission dominates the electroluminescence, whereas TADF is the major component at high voltages. The mechanism of dual emission was explored using experimental and theoretical methods
URI
https://pr.ibs.re.kr/handle/8788114/7763
DOI
10.1021/acs.jpclett.0c01580
ISSN
1948-7185
Appears in Collections:
Center for Catalytic Hydrocarbon Functionalizations(분자활성 촉매반응 연구단) > 1. Journal Papers (저널논문)
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