Mn2+-doped CsPbX3 (X=Cl, Br and I) perovskite nanocrystals and their applications

Colloidal Mn2+ doped CsPbX3(X=Cl, Br, I) nanocrystals(NCs) are being explored extensively as alternative emitting materials, wherein highly efficient optical and optoelectronic processes can be achieved. Mn2+ doping in perovskite NCs also reveals several new fundamental aspects of doping and new dopant-induced optical properties through different methods of synthesis. Mn2+ doping exists in wide-band-gap perovskite hosts where the excitation energy is transferred to an Mn d-state, resulting in short-range tunable yellow-orange d-d emissions. Enormous efforts have been expended on understanding the doping process and designing highly efficient doped NCs. The unique electronic and fluorescent properties endow these Mn2+ doped perovskite NCs with various optoelectronic applications in light-emitting diodes(LEDs) and solar cells. Combining all these facts, this review focuses on the recent progress in synthesis methods, emission mechanism, and potential applications of Mn2+ doped CsPbX3 perovskite NCs and provides an outline for plausible future studies.