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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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Related Experiment Video

Updated: Jul 1, 2026

Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors

Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors

Published on: November 15, 2016

Dual-Color-Emitting α-Sr₂P₂O₇:Eu²⁺, Mn²⁺ Phosphors Prepared by Co-Precipitation Method for w-LED Applications.

Vijay Singh¹, Santhosh Kumar Jayaraj¹, Aman Prasad²

¹Department of Chemical Engineering, Konkuk University, Seoul, Republic of Korea.

Luminescence : the Journal of Biological and Chemical Luminescence

|June 30, 2026

Summary

Europium (Eu²⁺) and manganese (Mn²⁺) doped strontium pyrophosphate phosphors were synthesized and analyzed. These phosphors exhibit tunable luminescence, showing potential for white light-emitting diodes (w-LEDs).

Keywords:

EPR Kubelka–Munk XRD photoluminescence w‐LEDs

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Area of Science:

Materials Science
Solid-State Chemistry
Luminescence

Background:

Strontium pyrophosphate (Sr₂P₂O₇) is a promising host lattice for phosphors.
Doping with rare-earth ions can modify luminescence properties.
Understanding dopant-host interactions is crucial for phosphor development.

Purpose of the Study:

To synthesize and characterize Eu²⁺/Mn²⁺-doped strontium pyrophosphate phosphors.
To analyze the crystal-field effects and luminescence properties.
To investigate the potential for white light generation.

Main Methods:

Homogenous co-precipitation synthesis.
X-ray Diffraction (XRD) for structural analysis.
Electron Paramagnetic Resonance (EPR) and Photoluminescence (PL) spectroscopy.

Main Results:

Single-phase orthorhombic structure confirmed by XRD.
EPR revealed enhanced crystal-field interactions for Eu²⁺ and Mn²⁺.
Photoluminescence showed blue (425 nm) and yellow (560 nm) emission bands.

Conclusions:

Eu²⁺ acts as a sensitizer for Mn²⁺, indicating energy transfer.
The phosphors exhibit potential for tunable white light generation.
These materials are suitable for white light-emitting diodes (w-LEDs) and solid-state lighting.