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1,3,4-oxadiazole-based deep-blue thermally activated delayed fluorescence emitters for organic light emitting diodes
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dc.contributor.author | Li, Zhaoning | |
dc.contributor.author | Li, Wenbo | |
dc.contributor.author | Keum, Changmin | |
dc.contributor.author | Archer, Emily | |
dc.contributor.author | Zhao, Baomin | |
dc.contributor.author | Slawin, Alexandra Martha Zoya | |
dc.contributor.author | Huang, Wei | |
dc.contributor.author | Gather, Malte Christian | |
dc.contributor.author | Samuel, Ifor David William | |
dc.contributor.author | Zysman-Colman, Eli | |
dc.date.accessioned | 2020-09-15T23:37:27Z | |
dc.date.available | 2020-09-15T23:37:27Z | |
dc.date.issued | 2019-10-10 | |
dc.identifier | 262039522 | |
dc.identifier | e8e65a4e-6cc7-4cf2-9586-168fe1b49749 | |
dc.identifier | 85072997684 | |
dc.identifier | 000490353900049 | |
dc.identifier.citation | Li , Z , Li , W , Keum , C , Archer , E , Zhao , B , Slawin , A M Z , Huang , W , Gather , M C , Samuel , I D W & Zysman-Colman , E 2019 , ' 1,3,4-oxadiazole-based deep-blue thermally activated delayed fluorescence emitters for organic light emitting diodes ' , Journal of Physical Chemistry , vol. 123 , no. 40 , pp. 24772-24785 . https://doi.org/10.1021/acs.jpcc.9b08479 | en |
dc.identifier.issn | 0022-3654 | |
dc.identifier.other | ORCID: /0000-0002-9527-6418/work/63380838 | |
dc.identifier.other | ORCID: /0000-0002-4857-5562/work/63380973 | |
dc.identifier.other | ORCID: /0000-0001-7183-6022/work/63380978 | |
dc.identifier.uri | https://hdl.handle.net/10023/20626 | |
dc.description | We are grateful to the EPSRC for financial support (grants EP/P010482/1, EP/J01771X, EP/J00916 and EP/R035164/1). We gratefully acknowledge funding through the EPSRC NSF- CBET lead agency agreement (EP/R010595/1, 1706207) and a Leverhulme Trust Research Grant (RPG-2017-231). We thank the EPSRC UK National Mass Spectrometry Facility at Swansea University for analytical services. Z.L. and W. L. thank the China Scholarship Council (grant numbers 201703780004 and 201708060003) | en |
dc.description.abstract | A series of four 1,3,4-oxadiazole-based thermally activated delayed fluorescence (TADF) derivatives are reported as emitters for organic light emitting diodes (OLEDs). As a function of the nature of the substituent on the weak 1,3,4-oxadiazole acceptor their emission color could be tuned from green-blue to blue. The highly twisted conformation between carbazoles and oxadiazoles results in effective separation of the HOMO and the LUMO resulting in a small singlet-triplet splitting. The corresponding singlet-triplet energy gaps (∆EST) range from 0.22 to 0.28 eV resulting in an efficient reverse intersystem crossing (RISC) process and moderate to high photoluminescence quantum yields (ΦPL), ranging from 35 to 70% in a DPEPO matrix. Organic light-emitting diodes (OLEDs) based on i-2CzdOXD4CF3Ph achieve maximum external quantum efficiency (EQEmax) of up to 12.3% with a sky-blue emission at CIE of (0.18, 0.28) while the device based on i-2CzdOXDMe shows blue emission at CIE of (0.17, 0.17) with a maximum EQE of 11.8%. | |
dc.format.extent | 4080755 | |
dc.language.iso | eng | |
dc.relation.ispartof | Journal of Physical Chemistry | en |
dc.subject | Oxadiazole | en |
dc.subject | TADF | en |
dc.subject | OLED | en |
dc.subject | Orientation | en |
dc.subject | Transition dipole | en |
dc.subject | Blue emitter | en |
dc.subject | QD Chemistry | en |
dc.subject | DAS | en |
dc.subject.lcc | QD | en |
dc.title | 1,3,4-oxadiazole-based deep-blue thermally activated delayed fluorescence emitters for organic light emitting diodes | en |
dc.type | Journal article | en |
dc.contributor.sponsor | EPSRC | en |
dc.contributor.sponsor | EPSRC | en |
dc.contributor.sponsor | EPSRC | en |
dc.contributor.sponsor | EPSRC | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. Organic Semiconductor Centre | en |
dc.contributor.institution | University of St Andrews. EaSTCHEM | en |
dc.contributor.institution | University of St Andrews. School of Chemistry | en |
dc.contributor.institution | University of St Andrews. Sir James Mackenzie Institute for Early Diagnosis | en |
dc.contributor.institution | University of St Andrews. Centre for Biophotonics | en |
dc.contributor.institution | University of St Andrews. Biomedical Sciences Research Complex | en |
dc.contributor.institution | University of St Andrews. Condensed Matter Physics | en |
dc.identifier.doi | 10.1021/acs.jpcc.9b08479 | |
dc.description.status | Peer reviewed | en |
dc.date.embargoedUntil | 2020-09-16 | |
dc.identifier.grantnumber | EP/P010482/1 | en |
dc.identifier.grantnumber | EP/J01771X/1 | en |
dc.identifier.grantnumber | EP/R035164/1 | en |
dc.identifier.grantnumber | EP/P010482/1 | en |
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