Heterophase Engineering of 0D/1D Lead-Free Metal Halide Perovskites via Mechanochemistry for White Light Emission
발표자
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초록
내용
Metal halide perovskites are highlighted for future active materials for light-emitting diodes (LEDs) with their superior optoelectronic properties such as external quantum efficiency values over 28% due to near-unity photoluminescence quantum efficiency (PLQE) values. Particularly, several mixed-low dimensional perovskites heterophases have emerged as appropriate candidates for constructing white-light color conversion devices, featuring broadband emission with large Stokes shift owing to self-trapped excitons. For enabling scalable one-step solid-state process with precise stoichiometric control and phase purity, we suggest mechanochemical synthesis, especially ball milling, to demonstrate cesium copper iodide low-dimensional perovskite heterophase system. We focus on their structure-optical properties relationship during solid-state synthesis process and it is expected to shed light on the potential of perovskite powder-based optoelectronic devices.