Manganese-Doped Low-Dimensional Cadmium Halide for Excitation-Dependent Multicolor Emitting

Area of Science:

• Materials Science
• Solid-State Chemistry
• Luminescence

Background:

• Low-dimensional metal halides (LDMHs) are promising perovskite-derived materials for solid-state lighting and displays.
• Significant challenges include thermal quenching and poor water stability, limiting their practical applications.

Purpose of the Study:

• To develop a facile manganese-doping strategy for cadmium-based LDMHs.
• To achieve simultaneous water and thermal stability with excitation-dependent luminescence.

Main Methods:

• Synthesized manganese-doped one-dimensional (1D) [C10H9ClN]CdCl3:xMn (x = 0.06%-5.06%) using a facile doping strategy.
• Investigated the luminescence properties, including photoluminescence quantum yield (PLQY) and excitation-dependent multicolor output.
• Analyzed structural stability under thermal stress and aqueous conditions, correlating with π···π stacking interactions and inorganic frameworks.

Main Results:

• Achieved highly efficient red luminescence with PLQY exceeding 34% in Mn2+-doped [C10H9ClN]CdCl3.
• Demonstrated adjustable excitation-dependent multicolor luminescence (green to white to red) due to dual emitting states.
• Confirmed robust water and thermal stability, preventing quenching and decomposition attributed to structural features.

Conclusions:

• Manganese doping provides a viable strategy for enhancing luminescence efficiency and stability in LDMHs.
• The developed materials offer tunable multicolor emission and excellent stability for potential applications in LEDs and anticounterfeiting.
• This work presents a rational design approach for high-performance luminescent materials with improved environmental resilience.