Mechanism for improvement of photoluminescence intensity in phosphor material
30 Jan 2020
Utilization in material design for developing phosphor materials for white LEDs
A research team consisting of Toyohashi University of Technology, Nagoya Institute of Technology, and the National Institute for Materials Science (NIMS) have clarified the mechanism by which the crystal structure of a red phosphor material obtained by adding P2O5 and Eu2O3 to a silicate (Ca2SiO4)-based material at various heat treatment temperatures changes in photoluminescence intensity due to differences in these factors.
Phosphor materials are widely used in everyday items such as vehicles and projectors in addition to LED lighting, and many researchers are developing phosphor materials using various approaches in search of brighter and more efficient phosphor materials. Knowledge of the photoluminescence intensity and crystal structure is important for designing brighter phosphor materials. In this study, the researchers succeeded in analyzing the changes in the crystal structure of the material at an atomic level due to heat treatment and the addition of P5+ and Eu3+ ions, and were able to clarify the relationships between these factors and the photoluminescence intensity.
Full text: Mechanism for improvement of photoluminescence intensity in phosphor material
TUT website: Press release