A triphenylamine substituted quinacridone derivative for solution processed organic light emitting diodes
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Thu, Trang Do
Yambem, Soniya D
Hong, Duc Pham
Chang, Samuel
Manzhos, Sergei
Katoh, Ryuzi
Sonar, Prashant
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Abstract
We report on a novel quinacridone derivative design, namely, 2,9-bis(4-(bis(4-methoxyphenyl)amino)phenyl)-5,12-bis(2-ethylhexyl)-5,12-dihydroquinolino[2,3-b]acridine-7,14-dione (TPA-QA-TPA) for possible use as a solution processable emissive layer in organic light emitting diodes (OLEDs). TPA-QA-TPA contains branched alkyl chains for enhanced solubility and methoxytriphenylamine moieties (TPA) as end capping groups. The end capping groups not only extend the molecular conjugation leading to a red shifted emission, but have a propeller shaped conformation. The propeller design hinders the intermolecular π-π stacking, hindering aggregation and hence suppressing concentration quenching of the fluorophores in the solid state. The new molecular design shows good thermal stability, with a decomposition temperature of 390 °C and a melting temperature of 295 °C. The absorption and emission maxima for TPA-QA-TPA compound are 552 and 622 nm respectively. Using TPA-QA-TPA as a dopant in tris(8-hydroxyquinolinato)aluminum (Alq3), organic light emitting diodes were realized in a simple device structure.
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Materials Chemistry and Physics
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206
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© 2018 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
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Macromolecular and materials chemistry
Materials engineering
Nanotechnology
Science & Technology
Materials Science, Multidisciplinary
Materials Science
Quinacridone
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da Cunha, MP; Thu, TD; Yambem, SD; Hong, DP; Chang, S; Manzhos, S; Katoh, R; Sonar, P, A triphenylamine substituted quinacridone derivative for solution processed organic light emitting diodes, Materials Chemistry and Physics, 2018, 206, pp. 56-63