Cesium manganese halide perovskite-analogue nanocrystals with highly efficient energy conversion for flexible multifunctional fibers

In recent years, all-inorganic perovskite materials have been considered and applied in various fields. In this work, we used an improved method to synthesize novel zero-dimensional (0D) lead-free Cs2Mn(Cl/Br)(4)center dot 2H(2)O perovskite-analogue nanocrystals (PA NCs) under aerobic conditions. At the same time, lead (Pb) was introduced into manganese (Mn) halide perovskite-analogue nanocrystals of Cs2Mn(Cl/Br)(4)center dot 2H(2)O via a hot-injection method. The PA NCs shows an intense orange light under a UV lamp. The fluorescence spectrum peak center of the PA NCs is located at around 598 nm, and the photoluminescence quantum yield (PLQY) is 41.12%. The PLQY of the original PA NCs was almost nonexistent at around 598 nm. The increase in PLQY was due to the replacement of Mn2+ with Pb2+, which effectively promotes the transfer of excitation energy to Mn2+. The Pb2+-doped Cs2Mn(Cl/Br)(4)center dot 2H(2)O PA NCs also exhibit excellent stability and strong PL. We also applied the PA NCs to composite paper. The properties described in this study provide new design ideas and directions for potential optronic devices.

Automated summary

In recent years, all-inorganic perovskite materials have been widely applied in various fields. In this study, novel zero-dimensional lead-free Cs2Mn(Cl/Br)(4)center dot 2H(2)O perovskite-analogue nanocrystals (PA NCs) were synthesized under aerobic conditions. The introduction of lead into manganese halide perovskite-analogue nanocrystals resulted in enhanced fluorescence properties. The Pb2+-doped Cs2Mn(Cl/Br)(4)center dot 2H(2)O PA NCs showed excellent stability and strong photoluminescence, providing new design ideas for potential optoelectronic devices.