Efficient donor-acceptor emitter based nonsymmetrical connection for organic emitting diodes with improving exciton utilization.

ABSTRACT: A new strategy developed to construct blue emissive materials having an unsymmetrical connection with identical conjugated phenanthrimidazole groups results in the separation of the frontier orbitals and leads to donor-acceptor (D-A) architecture. The blue device with 2-(naphthalen-1-yl)-1-(4-(1-(naphthalen-1-yl)-1H-phenanthro[9,10-d]imidazol-2-yl)phenyl)-1H-phenanthro[9,10-d]imidazole (p-PPI)/2-(naphthalen-1-yl)-1-(3-(1-(naphthalen-1-yl)-1H-phenanthro[9,10-d]imidazol-2-yl)phenyl)-1H-phenanthro[9,10-d]imidazole (m-PPI) emissive layer (λ _EL - 434/420 nm) shows high efficiencies: current efficiency (η _c) - 5.83/3.56 cd A^-1; power efficiency (η _p) - 5.73/3.48

SUBMITTER: Jayabharathi J 

PROVIDER: S-EPMC9049240 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature