Related Experiment Video
Updated: May 5, 2026

Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
A yellow-emitting phosphor of Mn(2+)-doped Na2CaP2O7
F Xiao1, E H Song2, Q Y Zhang2
1State Key Laboratory of Luminescent Materials and Devices, and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, PR China; School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, PR China.
Abstract:
A yellow-emitting Na2CaP2O7:Mn(2+)phosphors have been synthesized by solid state reaction. The crystal structure, photoluminescence properties as well as concentration quenching mechanism have been investigated. The (4)T1-(6)A1 emission of Mn(2+)in Na2CaP2O7 phosphor ranges from 500 to 650 nm and exhibits a red shift while increasing the Mn(2+)concentration. The crystal field strength is calculated based on the combination of excitation spectrum and Tanabe-Sugano diagram. The chromaticity coordinates of Na2CaP2O7:Eu(2+), Mn(2+)phosphors were discussed in order to develop the potential application in white light-emitting diodes (LEDs).
Related Concept Videos
Photoluminescence: Applications
Fluorescence and Phosphorescence: Instrumentation
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
Qualitative Analysis
For instance, group IV...

