Jong Hyun Park

TL;DR: This work exemplifies how the functionality of metal halide perovskites is extremely sensitive to the nature of the (nano)crystalline surface and presents a route through which to control the formation and migration of surface defects to achieve bandgap stability for light emission and could also have a broader impact on other optoelectronic applications-such as photovoltaics-for which band gap stability is required.

TL;DR: This work reports significant beneficial effects using a new treatment based on amine-based passivating materials (APMs) to passivate the defect sites of methylammonium lead tribromide (MAPbBr3) through coordinate bonding between the nitrogen atoms and undercoordinated lead ions.

TL;DR: The electrical property of CsPbBr3 PNCs was optimized by tuning the long-chain length of QAB ligands for balanced charge-carrier transport and the optical property and stability of C'sPb br3 P NCs were enhanced.

TL;DR: A perovskite LED with a perovSkite film treated under optimum thermal annealing conditions exhibits a significantly enhanced long-term stability with full coverage of the green electroluminescence emission due to the highly uniform morphology of the perovkite film.

TL;DR: By effectively controlling the crystal growth, perovskite films composed of uniform nanosized single crystals produced by introducing bulky amine ligands and performing the growth at a lower temperature maximized the radiative bimolecular recombination yield by reducing the trap density and spatially confining the charges.