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Tunable Broad Wavelength Emissions in Sn2+-Doped Zero-Dimensional All Inorganic K4CdCl6 via Rb+ Alloying
Yanjiao Zhang1,2, Pifu Gong3, Mingxing Chen4
1College of Petrochemical Engineering, Jilin University of Chemical Technology, Jilin132022, China.
Inorganic Chemistry
|July 10, 2026
Summary
Researchers achieved tunable yellow-to-blue light emission in K4CdCl6 halide materials using Rb/Sn codoping. This breakthrough enables advanced optical anticounterfeiting and digital encryption devices.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Optoelectronics
Background:
- Tunable fluorescence is crucial for optoelectronics and information security.
- Metal halide materials offer potential for luminescent applications.
Purpose of the Study:
- To achieve broad-wavelength photoluminescence (PL) tuning in zero-dimensional (0D) K4CdCl6 halide.
- To develop a facile ion doping strategy for luminescence modulation.
- To explore applications in optical anticounterfeiting and digital encryption.
Main Methods:
- Utilizing a Rb/Sn codoping strategy in K4CdCl6.
- Investigating photoluminescence (PL) properties.
- Employing density functional theory (DFT) calculations.
Main Results:
- Achieved continuous PL tuning from yellow to white to blue in K4CdCl6:Sn2+ via Rb+ alloying.
- Sn2+ doping introduced impurity energy levels, enhancing PL emission.
- Successfully developed three-level color-coded intelligent password devices.
Conclusions:
- A reliable ion doping strategy for luminescence modulation in metal halides was developed.
- The tunable luminescent system shows promise for advanced optoelectronic applications, including anticounterfeiting and encryption.
