Tuning the upconversion light emission by bandgap engineering in bismuth oxide-based upconverting nanoparticles

Area of Science:

• Materials Science
• Nanotechnology
• Photonics

Background:

• Developing emission-tunable nanomaterials for upconversion processes is crucial for novel applications.
• Existing strategies often face challenges in achieving precise chromaticity control.

Purpose of the Study:

• To design Yttrium (Y3+) and Erbium (Er3+) codoped bismuth oxide-based upconverting nanoparticles.
• To demonstrate host matrix manipulation for emission selectivity and chromaticity control.

Main Methods:

• Synthesizing Y3+ and Er3+ codoped bismuth oxide nanoparticles.
• Engineering the bandgap of the bismuth oxide host matrix.
• Analyzing upconversion emission properties and chromaticity.

Main Results:

• The bismuth oxide host matrix plays an active role in emission selectivity.
• Bandgap manipulation of the host (range of 0.65 eV) enabled tunable upconversion emission from red to yellow-greenish.
• Achieved fine control over nanoparticle chromaticity through host bandgap engineering.

Conclusions:

• Host bandgap engineering is a viable strategy for developing emission-tunable upconverting nanophosphors.
• This approach offers a novel concept for a new generation of upconverting nanomaterials.
• The developed nanoparticles exhibit potential for advanced photonic and display applications.