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Gupta AK, Matulaitis T, Cordes DB, Slawin AM, Samuel ID, Zysman-Colman E. Highly twisted α-diketone-based thermally activated delayed fluorescence emitters and their use in organic light-emitting diodes. CAN J CHEM 2021. [DOI: 10.1139/cjc-2021-0208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We have designed a highly twisted small thermally activated delayed fluorescence (TADF) emitter PXZ-α-DK based on an α-diketone (α-DK) as a strong acceptor and phenoxazine (PXZ) as a strong donor to obtain red-shifted emission in comparison with the equivalent α-diketone linked to 9,9-dimethyl-9,10-dihydroacridine (DMAC). The PXZ-α-DK shows emission at 586 nm and DMAC-α-DK shows emission at 548 nm in 1,3-bis(N-carbazolyl)benzene (mCP) host at 1.5 wt% doping of the emitter, with short-delayed lifetimes of 6.9 μs for PXZ-α-DK and 7.6 μs for DMAC-α-DK. Organic light-emitting diodes (OLEDs) fabricated using these emitters show green electroluminescence at 555 nm for DMAC-α-DK, with a maximum external quantum efficiency, EQEmax, of 6.3%, and orange electroluminescence at 585 nm for PXZ-α-DK, with an EQEmax of 0.8%. We corroborate the optoelectronic properties of these emitters with DFT calculations.
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Affiliation(s)
- Abhishek Kumar Gupta
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, UK
- Organic Semiconductor Centre, SUPA School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, UK
| | - Tomas Matulaitis
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, UK
| | - David B. Cordes
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, UK
| | - Alexandra M.Z. Slawin
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, UK
| | - Ifor D.W. Samuel
- Organic Semiconductor Centre, SUPA School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS, UK
| | - Eli Zysman-Colman
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, UK
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Mazur LM, Roland T, Leroy-Lhez S, Sol V, Samoc M, Samuel ID, Matczyszyn K. Efficient Singlet Oxygen Photogeneration by Zinc Porphyrin Dimers upon One- and Two-Photon Excitation. J Phys Chem B 2019; 123:4271-4277. [DOI: 10.1021/acs.jpcb.8b12561] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Leszek M. Mazur
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, Wroclaw 50-370, Poland
| | - Thomas Roland
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, Fife KY16 9SS, U.K
| | - Stephanie Leroy-Lhez
- Laboratoire PEIRENE EA 7500, Faculté des Sciences et Techniques, 123, Avenue Albert Thomas, Limoges cedex 87060, France
| | - Vincent Sol
- Laboratoire PEIRENE EA 7500, Faculté des Sciences et Techniques, 123, Avenue Albert Thomas, Limoges cedex 87060, France
| | - Marek Samoc
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, Wroclaw 50-370, Poland
| | - Ifor D.W. Samuel
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, Fife KY16 9SS, U.K
| | - Katarzyna Matczyszyn
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, Wroclaw 50-370, Poland
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Kulyk O, Ibbotson SH, Moseley H, Valentine RM, Samuel ID. Development of a handheld fluorescence imaging device to investigate the characteristics of protoporphyrin IX fluorescence in healthy and diseased skin. Photodiagnosis Photodyn Ther 2015; 12:630-9. [DOI: 10.1016/j.pdpdt.2015.10.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 09/10/2015] [Accepted: 10/06/2015] [Indexed: 11/30/2022]
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Quinn SD, Deas LA, Dalgarno PA, Hedley GJ, Samuel ID, Penedo C. Solubilisation of Lipid Membranes by Detergents: Probing the Three-State Model at the Single Vesicle Level. Biophys J 2013. [DOI: 10.1016/j.bpj.2012.11.979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Hayes GR, Samuel ID, Phillips RT. Ultrafast high-energy luminescence in a high-electron-affinity conjugated polymer. Phys Rev B Condens Matter 1996; 54:R8301-R8304. [PMID: 9984580 DOI: 10.1103/physrevb.54.r8301] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Harrison NT, Baigent DR, Samuel ID, Friend RH, Grimsdale AC, Moratti SC, Holmes AB. Site-selective fluorescence studies of poly(p-phenylene vinylene) and its derivatives. Phys Rev B Condens Matter 1996; 53:15815-15822. [PMID: 9983418 DOI: 10.1103/physrevb.53.15815] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Fiorini C, Charra F, Nunzi JM, Samuel ID, Zyss J. Light-induced second-harmonic generation in an octupolar dye. Opt Lett 1995; 20:2469. [PMID: 19865255 DOI: 10.1364/ol.20.002469] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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Hayes GR, Samuel ID, Phillips RT. Exciton dynamics in electroluminescent polymers studied by femtosecond time-resolved photoluminescence spectroscopy. Phys Rev B Condens Matter 1995; 52:11569-11572. [PMID: 9980271 DOI: 10.1103/physrevb.52.r11569] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Samuel ID, Rumbles G, Collison CJ. Efficient interchain photoluminescence in a high-electron-affinity conjugated polymer. Phys Rev B Condens Matter 1995; 52:11573-11576. [PMID: 9980272 DOI: 10.1103/physrevb.52.r11573] [Citation(s) in RCA: 131] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Samuel ID, Ledoux I, Dhenaut C, Zyss J, Fox HH, Schrock RR, Silbey RJ. Saturation of Cubic Optical Nonlinearity in Long-Chain Polyene Oligomers. Science 1994; 265:1070-2. [PMID: 17832897 DOI: 10.1126/science.265.5175.1070] [Citation(s) in RCA: 134] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The scaling of the cubic nonlinearity gamma with chain length in polyenic molecules has received considerable theoretical attention. Earlier experimental investigations have been restricted to oligomers with fewer than 20 double bonds because of problems associated with the synthesis and solubility of conjugated molecules. These synthetic difficulties have been overcome in the present study by the use of modern living polymerization techniques. Solution measurements of gamma as a function of chain length in long-chain (up to 240 double bonds) model polyene oligomers are reported. A saturation of the increase of gamma with chain length is observed, and the onset of this saturation occurs for chain lengths considerably longer than predicted from theory.
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Samuel ID, Meyer KE, Graham SC, Friend RH, Rühe J, Wegner G. Femtosecond optical absorption in poly(3-alkyl thienylene)s. Phys Rev B Condens Matter 1991; 44:9731-9734. [PMID: 9998966 DOI: 10.1103/physrevb.44.9731] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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