Dual-emission CPB@SMSO@SiO₂ composites with tunable afterglow through energy transfer

Area of Science:

• Materials Science
• Photoluminescence
• Nanotechnology

Background:

• Afterglow materials lack diverse colors, high luminosity, and stability.
• Developing adjustable afterglow materials with enhanced photoluminescence (PL) and stability is critical.

Purpose of the Study:

• To fabricate core-shell composites (CPB@SMSO@SiO2) with adjustable afterglow properties.
• To enhance photoluminescence intensity and stability of afterglow materials.

Main Methods:

• In-situ growth and hydrolytic coating were used to create CPB@SMSO@SiO2 composites.
• Composites combine Sr2MgSi2O7: Eu2+, Dy3+ (SMSO) and CsPbBr3/CPB PeQDs.
• SiO2 shell formation via tetramethyl orthosilicate (TMOS) hydrolysis enhances stability.

Main Results:

• SMSO absorbs 365 nm UV light and emits 470 nm light, boosting CsPbBr3 PeQDs' PL intensity.
• Afterglow color is tunable from green to blue by adjusting SMSO and CsPbBr3 ratio.
• SiO2 shell significantly improves the overall stability of the composites.

Conclusions:

• The developed CPB@SMSO@SiO2 composites offer tunable afterglow colors, enhanced PL intensity, and improved stability.
• This work presents a promising route for creating advanced afterglow materials.
• The core-shell structure effectively addresses limitations of traditional afterglow materials.