Phenylene-bridged cyclic multi-resonance TADF emitters for high-efficiency and high-color-purity sky-blue OLEDs with EQE of 30%
Kengo Kumada, Hisahiro Sasabe, Misaki Matsuya, Naoto Yoshida, Keigo Hoshi, Takeru Nakamura, Haruki Nemma, Junji Kido
Abstract
Three phenylene-bridged MR-TADF emitters with different numbers of carbazole units are developed. These emitters exhibit sky-blue emission around 480 nm with a small FWHM of ∼31 nm, near-unity PLQY, and an EQE of nearly 30%.
Topics & Concepts
Materials scienceOLEDFull width at half maximumElectroluminescenceOptoelectronicsSkyPhenyleneCarbazoleQuantum efficiencyPhotochemistryNanotechnologyPolymerChemistryPhysicsAstrophysicsComposite materialLayer (electronics)Organic Light-Emitting Diodes ResearchOrganic Electronics and PhotovoltaicsLuminescence and Fluorescent Materials