Stable and Bright Pyridine Manganese Halides for Efficient White Light-Emitting Diodes

Highly efficient lead halide perovskites with tunable emission performance have become new candidate materials for light-emitting devices and displays; however, the toxicity of lead and instability of halide perovskites greatly limits their application. Herein, rapid and large-scale synthesis of highly emissive organic-inorganic manganese halide perovskites, (C5H6N)(2)MnBr4 and C5H6NMnCl3, are presented by a one-pot solution-based method, of which (C5H6N)(2)MnBr4 displays a high absolute photoluminescence quantum yield (95%) in the solid-state. The developed (C5H6N)(2)MnBr4 perovskite noticeably exhibits high stability. Therefore both as-synthesized green and red emissive manganese-based phosphors with superior optical properties are used to fabricate blue light pumped white light-emitting diodes (WLEDs), displaying excellent quality white light with a high color rendering index value of 91 and a correlated color temperature of 5331 K. This study not only presents the robust large-scale production synthetic approach for organic-inorganic manganese halide perovskites, but also facilitates the development of high-performance phosphors for future lighting and display technologies.

Automated summary

This study successfully synthesized highly emissive organic-inorganic manganese halide perovskites using a one-pot solution-based method, demonstrating their potential application in blue light pumped white light-emitting diodes with superior white light emission quality.