Dong Ha Kim

TL;DR: A perovskite mixed material comprising a series of differently quantum-size-tuned grains that funnels photoexcitations to the lowest-bandgap light-emitter in the mixture functions as charge carrier concentrators, ensuring that radiative recombination successfully outcompetes trapping and hence non-radiatives recombination.

TL;DR: Reduced-dimensionality (quasi-2D) perovskite films are reported that exhibit improved stability while retaining the high performance of conventional three-dimensionalperovskites, and are achieved by the choice of stoichiometry in materials synthesis.

TL;DR: The first perovskite–PCBM hybrid solid with significantly reduced hysteresis and recombination loss achieved in a single step is reported, and it is posited that PCBM, by tying up both halide-rich antisites and unincorporated halides, reduces electric field-induced anion migration that may give rise to hysteResis and unstable diode behaviour.

TL;DR: A two-step ligand-exchange strategy is developed, in which the long-carbon- chain ligands on all-inorganic perovskite quantum dots (QDs) are replaced with halide-ion-pair ligands.

TL;DR: A comprehensive overview of the recent progress of perovskite-based photodetectors focusing on versatile compositions, structures, and morphologies of constituent materials, and diverse device architectures toward the superior performance metrics is provided.