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Issue 20, 2018
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Thermally activated delayed fluorescence with a narrow emission spectrum and organic room temperature phosphorescence by controlling spin–orbit coupling and phosphorescence lifetime of metal-free organic molecules

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Abstract

This work presents a study of two organic molecules with a very similar, large singlet–triplet energy gap, one of which is a thermally activated delayed fluorescence (TADF) emitter and the other is a room temperature phosphorescence (RTP) emitter. By investigating their photophysical properties we are able to explain their distinct behavior. The molecules are studied in non-polar polymers and OLED hosts. Furthermore, this work presents a CT TADF emitter that shows a narrow and resolved electroluminescence spectrum (FWHM = 53 nm). The study shows an efficient RTP emitter based on a D–D–D structure and also the first acridone-based TADF emitter with a D–A–D structure.

Graphical abstract: Thermally activated delayed fluorescence with a narrow emission spectrum and organic room temperature phosphorescence by controlling spin–orbit coupling and phosphorescence lifetime of metal-free organic molecules

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Publication details

The article was received on 11 Jan 2018, accepted on 13 Apr 2018 and first published on 16 Apr 2018


Article type: Paper
DOI: 10.1039/C8TC00175H
Citation: J. Mater. Chem. C, 2018,6, 5434-5443
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    Thermally activated delayed fluorescence with a narrow emission spectrum and organic room temperature phosphorescence by controlling spin–orbit coupling and phosphorescence lifetime of metal-free organic molecules

    P. Pander, A. Swist, R. Motyka, J. Soloducho, F. B. Dias and P. Data, J. Mater. Chem. C, 2018, 6, 5434
    DOI: 10.1039/C8TC00175H

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