Hybrid Cd²⁺-Based Halide Birefringent Crystals Achieving Tunable Dual-Color Emission for Multifunctional LED and...

Area of Science:

• Materials Science
• Solid-State Chemistry
• Optoelectronics

Background:

• Tunable luminescent materials are crucial for secure information encryption.
• One-dimensional (1D) crystals offer unique optical properties.
• Birefringent materials are valuable for optical applications.

Purpose of the Study:

• To synthesize and characterize a novel 1D crystal, (4-AMP)2Cd3Cl10·4(H2O), for luminescent and birefringent applications.
• To achieve tunable multicolor luminescence through Mn2+ doping.
• To explore the potential of these materials in information encryption and optoelectronics.

Main Methods:

• Solution method for crystal growth.
• Photoluminescence spectroscopy for emission analysis.
• X-ray diffraction and theoretical calculations for structural and mechanistic insights.
• Fabrication of LED devices and anticounterfeit models.

Main Results:

• Successfully synthesized 1D (4-AMP)2Cd3Cl10·4(H2O) crystals with broadband blue emission.
• Determined large birefringence (0.158@546 nm) and short UV cutoff (264 nm).
• Achieved tunable multicolor and dual-color luminescence by doping with Mn2+.
• Observed bright red emission (632 nm) with high photoluminescence quantum yield (PLQY) of 73.06% for Mn2+-doped samples.
• Confirmed Mn2+ (4T1(G)→6A1(S)) and organic units as luminescence origins.

Conclusions:

• The novel 1D crystal demonstrates potential as a UV birefringent material.
• Mn2+ doping effectively tunes luminescence, enabling multicolor and dual-color emission.
• The developed materials show promise for anticounterfeiting and advanced optoelectronic applications.