BN-coated Ca(1-x)Sr(x)S:Eu solid-solution nanowires with tunable red light emission

Area of Science:

• Materials Science
• Nanotechnology
• Solid-State Chemistry

Background:

• Development of novel phosphors for advanced optical applications is crucial.
• Nanostructured materials offer unique properties for enhanced performance.
• Existing red-emitting phosphors often face challenges in stability and color purity.

Purpose of the Study:

• To synthesize and characterize novel boron nitride (BN)-coated calcium strontium sulfide (Ca(1-x)Sr(x)S):Eu nanowires.
• To investigate the structural and luminescence properties of this new nanocomposite.
• To explore the potential for color tuning and enhanced emission through composition and codoping.

Main Methods:

• Controlled growth of Ca(1-x)Sr(x)S nanowires using a solid-liquid-solid process.
• Coating of nanowires with homogeneous protective BN nanolayers.
• Systematic investigation of structure and luminescence properties using high-spatial-resolution cathodoluminescence.

Main Results:

• Successful synthesis of BN-coated Ca(1-x)Sr(x)S:Eu solid-solution nanowires.
• Effective red color tuning achieved by adjusting the Ca(1-x)Sr(x)S composition.
• Enhanced orange emission observed in CaS nanowires codoped with Ce(3+) and Eu(2+) due to energy transfer.

Conclusions:

• BN-coated Ca(1-x)Sr(x)S:Eu nanowires represent a promising new class of red-emitting nanophosphors.
• The ability to tune color and enhance emission makes them suitable for advanced nanodevices.
• Potential applications include high-performance white light-emitting diodes (LEDs).