Thermoluminescence and Mechanoluminescence Properties of UV- Irradiated Ca₂Al₂SiO₇:Ce³⁺, Tb³⁺ Phosphor

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• 作者：Geetanjali Tiwari^a ; ^{geetanjali.tiwari10@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Nameeta Brahme^a ; ^{namitabrahme@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; D.P. Bisen^a ; Sanjay Kumar Sao^a ; Ravi Sharma^b
• 关键词：Calcium Alumino Silicate ; Combustion Synthesis ; Mechanoluminescence ; Thermoluminescence
• 刊名：Physics Procedia
• 出版年：2015
• 出版时间：2015
• 年：2015
• 卷：76
• 期：Complete
• 页码：53-58
• 全文大小：484 K

文摘

Rare earth activated, white light emitting Ca₂Al₂SiO₇: Ce³⁺, Tb³⁺ phosphor was synthesized by combustion method at initiating temperature of 600 ⁰C, using urea as a reducer. X – Ray diffraction, absorption spectra, thermoluminescence(TL) and mechanoluminescence (ML) were studied. The particle size was found to be 50.85 nm. The absorption spectra shows that the absorption edge is at λ = 240 nm. Two peaks were observed in the plot of time vs ML intensity. ML intensity increases with increasing droping height of the piston. The TL intensity was increased with increasing UV exposure time indicating the increase in concentration of trapped carriers with UV exposure. The TL emission spectra was found at 400 nm (UV-violet band) and 540 nm (green band).