Himchan Cho

TL;DR: Efficient organic-inorganic perovskite light-emitting diodes were made with nanograin crystals that lack metallic lead, which helped to confine excitons and avoid their quenching.

TL;DR: Bright organic/inorganic hybrid perov-skite light-emitting diodes are realized by using CH3 NH3 PbBr3 as an emitting layer and self-organized buffer hole-injection layer (Buf-HIL) to facilitate hole injection.

TL;DR: Efficient quasi-2D-structure perovskite light-emitting diodes are demonstrated by mixing a 3D-structured perovSkite material and a 2D- structures, which can be ascribed to better film uniformity, enhanced exciton confinement, and reduced trap density.

TL;DR: The progress of perovskite emitters in two directions of bulk perovSKite polycrystalline films and perovSkite nanoparticles is reviewed, current challenges are described, and future research directions for researchers are suggested to encourage them to collaborate and to make a synergetic effect in this rapidly emerging multidisciplinary field.

TL;DR: The origins of the instability in PeLEDs are reviewed and the strategies to improve the stability of MHP materials and Pe LEDs are critically reviewed, such as A-site cation engineering, Ruddlesden-Popper phase, suppression of ion migration with additives and blocking layers, fabrication of uniform bulk polycrystalline MHP layers, and fabrication of stable MHP nanoparticles.