Effect of TADF Assistance on Performance Enhancement in Solution Processed Green Phosphorescent OLEDs.

ABSTRACT: Many methods have been proposed to increase the efficiency of organic electroluminescent materials applied as an emissive layer in organic light emitting diodes (OLEDs). Herein, we demonstrate enhancement of electroluminescence efficiency and operational stability solution processed OLEDs by employing thermally activated delayed fluorescence (TADF) molecules as assistant dopants in host-guest systems. The TADF assistant dopant (SpiroAC-TRZ) is used to facilitate efficient energy transfer from host material poly(N-vinylcarbazole) (PVK) to a phosphorescent Ir(III) emitter. We present the analysis of energy transfer and charge trapping-two main processes playing a crucial role in light generation in host-guest structure OLEDs. The investigation of photo-, electro- and thermoluminescence for t

SUBMITTER: Witkowska E 

PROVIDER: S-EPMC8038252 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature