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Study on Red Long-Time Luminescent Material Y2O2S:Eu, M (M = Mg, Ca, Sr, Ba)

Author:
Chen Yongjie   Qiu Guanming   Geng Xiujuan   Yang Ying   Shi Shuang   Wang Hui   Zhang Zhongqiu  


Journal:
JOURNAL OF RARE EARTHS


Issue Date:
2007


Abstract(summary):

The red long-time luminescent material Y(2)O(2)S:Eu(3+), M (M = Mg, Ca, Sr, Ba) was prepared by high temperature solid-state method. The XRD result of the sample showed that the crystal phase was Y(2)O(2)S, which belong to hexagonal system, and no new crystal phase were by doping different amount of Mg, Ca, Sr, Ba. The excitation spectrum was a broad band within 200 similar to 400 nm region, the characteristic peaks of emission spectrum were located at 583, 595, 597, 617, 627, 707 nm. There was no marked change in excitation spectra, emission spectra and maximum of their wavelengths of the luminescent materials by doping with different ions. The luminescent intensity of the phosphors were stronger when the concentration of doping ions was Mg/Y = 6%, Ca/Y = 4%, Sr/Y = 8%, Ba/Y = 2.5 %, respectively. Its sequence of luminescent intensity from high to low is Sr > Ba > Mg > Ca.


Page:
113-116


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