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arXiv · 1009.4557

Red-emitting fluorescent Organic Light emitting Diodes with low sensitivity to self-quenching

Sebastien Forget·Sebastien Chenais·Denis Tondelier·Bernard Geffroy·Iryna Gozhyk·Mélanie Lebental·Elena Ishow
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Abstract

Concentration quenching is a major impediment to efficient organic light-emitting devices. We herein report on Organic Light-Emitting Diodes (OLEDs) based on a fluorescent amorphous red-emitting starbust triarylamine molecule (4-di(4'-tert-butylbiphenyl-4-yl)amino-4'-dicyanovinylbenzene, named FVIN), exhibiting a very small sensitivity to concentration quenching. OLEDs are fabricated with various doping levels of FVIN into Alq3, and show a remarkably stable external quantum efficiency of 1.5% for doping rates ranging from 5% up to 40%, which strongly relaxes the technological constraints on the doping accuracy. An efficiency of 1% is obtained for a pure undoped active region, along with deep red emission (x=0.6; y=0.35 CIE coordinates). A comparison of FVIN with the archetypal DCM dye is presented in an identical multilayer OLED structure.

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Sebastien Forget, Sebastien Chenais, Denis Tondelier, Bernard Geffroy, Iryna Gozhyk, Mélanie Lebental, Elena Ishow. 2010-09-23. Red-emitting fluorescent Organic Light emitting Diodes with low sensitivity to self-quenching. https://doi.org/10.1063/1.3481460

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