All-fluorescence white organic light-emitting diodes with record-beating power efficiencies over 130 lm W^‒1 and small roll-offs.

ABSTRACT: Improving power efficiency (PE) and reducing roll-off are of significant importance for the commercialization of white organic light-emitting diodes (WOLEDs) in consideration of energy conservation. Herein, record-beating PE of 130.7 lm W^-1 and outstanding external quantum efficiency (EQE) of 31.1% are achieved in all-fluorescence two-color WOLEDs based on a simple sandwich configuration of emitting layer consisting of sky-blue and orange delayed fluorescence materials. By introducing a red fluorescence dopant, all-fluorescence three-color WOLEDs with high color rendering index are constructed based on an interlayer sensitization configuration, furnishing ultrahigh PE of 110.7 lm W^-1 and EQE of 30.8%. More importantly, both two-color and three-color WOLEDs maintain ex

SUBMITTER: Liu H 

PROVIDER: S-EPMC9440051 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature