| Summary: | 碩士 === 國立成功大學 === 材料科學及工程學系碩博士班 === 94 === Red phosphors applied in UV-LED is the one of the significant topicsrecently. In order to obtain the efficient phosphors, MSiO3:Eu3+ X mole%
( M=Mg, Ca, Sr, Ba；X=0~20 ) were synthesized via sol-gel method. Theeffects of calcination temperature, contents of Eu3+and Bi3+, conditions of re-heat treatment and hydrolysis of TEOS on the relative emission intensity of the phosphors were investigated.
It had similar form for the emission spectra of MSiO3:Eu3+ ( M=Mg, Ca, Sr, Ba ). The emission intensity peaks are at 613 and 590nm while the
MSiO3:Eu3+ ( M=Mg, Ca, Sr, Ba ) phosphors were excited by UV-LED ( λem=383nm ). However, it had higher emission intensity of MgSiO3:0.12Eu3+calcined at 800 oC, CaSiO3:0.12Eu3+ calcined at 1200 oC,
SrSiO3:0.12Eu3+ calcined at 900 oC and BaSiO3:0.12Eu3+ calcined at 900 oC
for 2h.
In the study, the emission intensity of MgSiO3:0.12Eu3+ powders increased with raising the temperature of re-heat treatment。The phosphors had the highest emission intensity while controlling the re-heat treatment at
1000 oC、the condition of TEOS at 40 oC, pH=0.85。Doping 6mol% Bi3+ for the phosphors is also increasing the emission intensity.
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