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Universal Host Materials for Red, Green and Blue High-Efficiency Single-Layer Phosphorescent Organic Light-Emitting Diodes

Abstract : Simplifying the structure of Organic Light-Emitting Diodes (OLEDs) has been for the last twenty years the purpose of many studies. However, despite these efforts, only a few materials provide high efficiency devices. We report herein efficient design strategies to construct universal host materials for red, green and blue Single-Layer Phosphorescent OLEDs (SL-PhOLEDs). The three materials investigated, SPA-2,7-F(POPh2)2, SPA-3,6-F(POPh2)2 and SPA-2-FPOPh2, have been synthesized via an efficient approach and are constructed on the association of an electron rich phenylacridine unit connected by a spiro carbon atom to three different electron-deficient diphenylphosphineoxide-substituted fluorenes. Electrochemical, spectroscopic, thermal and transport properties are discussed. The position (C2 and C7 vs. C3 and C6) and the number (1 vs. 2) of diphenylphosphineoxide units on the fluorene backbone have been particularly studied to highlight the best combination in term of device performances.
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Submitted on : Tuesday, November 10, 2020 - 10:35:16 AM
Last modification on : Thursday, November 19, 2020 - 10:08:30 AM

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Fabien Lucas, Cassandre Quinton, Sadiara Fall, Thomas Heiser, Denis Tondelier, et al.. Universal Host Materials for Red, Green and Blue High-Efficiency Single-Layer Phosphorescent Organic Light-Emitting Diodes. Journal of Materials Chemistry C, Royal Society of Chemistry, 2020, ⟨10.1039/D0TC04650G⟩. ⟨hal-02997278⟩

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