A defect-passivation strategy is proposed to fabricate efficient sky-blue PeLEDs by using three additives: 2-(4-fluorophenyl) ethylamine hydrobromide (p-F-PEABr), lithium bromide (LiBr), and diethylamine hydrobromide (DEABr).
A novel multi-luminescent center integrated MOF phosphor was constructed by anchoring CsPbX3 NCs on the surface of MOFs while encapsulating dyes in the pores of MOFs.
Use of an o-F-PEABr ligand containing an intramolecular hydrogen bond can effectively suppress low-n phases in quasi-2D perovskites. The resultant light-emitting diodes achieve a maximum efficiency of 7.55% and a pure blue emission at 475 nm.
For CsPbX3 quantum dots, the mechanism behind the nonlinear absorption phenomenon was studied, and the influence of material stability, uniformity and optical band gap on nonlinear absorption was analyzed in detail.
An in situ XPS measurement is proposed by employing a built-in charge neutralization system to simulate the practical operation of light-emitting diodes for unraveling the degraded electron durability of reduced-dimensional perovskite emitters.