Highly Efficient Solution-Processable Nanophosphor with Ambipolar Shell.

Super-resolution display (SRD) is crucial to all super-resolution processing technologies for visualization terminals. Herein, as a proof-of-concept, an iridium-complexed nanoemitter, [Ir(CzPOPBI)3 ] (CzPOPBI=9,9'-(3,3'-(4-(1-(3-(4-(diphenylphosphoryl)phenoxy)propyl)-1H-benzo[d]imidazol-2-yl)-1,2-phenylene)bis(oxy)bis(propane-3,1-diyl))bis(3,6-di-tert-butyl-9H-carbazole)), with a core-shell structure for charge and exciton spatial allocation is reported, the ambipolar shell of which can balance shell-to-core charge transfer and excess charge export. As a result, top performance of spin-coated host-free bilayer devices was realized, owing to the simultaneous exciton confinement in the core and exciton-charge quenching suppression. The competence of [Ir(CzPOPBI)3 ] as a single-molecule emissive layer of nanopixel units shows the great potential of this kind of organic core-shell system for high-performance SRD applications.