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Photoluminescence: Applications

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

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Updated: Dec 19, 2025

Low-energy Cathodoluminescence for OxyNitride Phosphors

Low-energy Cathodoluminescence for OxyNitride Phosphors

Published on: November 15, 2016

Highly efficient phosphor-glass composites by pressureless sintering.

Dao Zhang¹, Wenge Xiao², Chang Liu³

¹State Key Laboratory of Modern Optical Instrumentation, School of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, China.

Nature Communications

|June 6, 2020

Summary

This summary is machine-generated.

Researchers developed stable, efficient all-inorganic color converters using phosphor-silica glass composites. This pressureless sintering method overcomes interfacial reactions, enabling high quantum efficiency for advanced lighting applications.

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Last Updated: Dec 19, 2025

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Area of Science:

Materials Science
Optoelectronics
Solid-State Chemistry

Background:

High-power white light-emitting diodes (LEDs) require efficient and stable all-inorganic color converters.
Phosphor-glass/ceramic composites offer potential by combining phosphor efficiency with matrix stability.
Interfacial reactions between phosphors and matrices at high temperatures degrade phosphor efficiency, necessitating advanced fabrication methods.

Purpose of the Study:

To develop a facile and general strategy for creating highly efficient and stable all-inorganic phosphor-glass composites.
To inhibit interfacial reactions between phosphors and glass matrices during composite fabrication.
To enable the production of color-tunable phosphor-glass composites suitable for 3D printing.

Main Methods:

Utilizing silica glass as the matrix to intrinsically inhibit interfacial reactions, unlike multicomponent glasses.
Employing a pressureless sintering method for embedding phosphors within the silica glass matrix.
Characterizing the resulting phosphor-glass composites for efficiency, thermal stability, and hydrothermal stability.

Main Results:

The developed phosphor-silica glass composites exhibit intrinsic inhibition of interfacial reactions.
The composites demonstrate high internal quantum efficiency exceeding 90.0%.
The materials show excellent thermal stability up to 1200°C and hydrothermal stability up to 200°C.

Conclusions:

A facile and general strategy for developing all-inorganic functional composites has been established.
The phosphor-silica glass composites are highly efficient, stable, and compatible with 3D printing.
This approach overcomes limitations of traditional high-pressure consolidation techniques for phosphor-based materials.