Photoluminescence of Pr³⁺-doped calcium and strontium stannates

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• 作者：Andrius Stanulis^a ; ^b ; ^{andrius.stanulis@chf.vu.lt" class="auth_mail" title="E-mail the corresponding author} ; Arturas Katelnikovas^c ; Marlies Van Bael^d ; ^e ; An Hardy^d ; ^e ; Aivaras Kareiva^a ; Thomas Justel^f ; ^{andrius.stanulis@chf.vu.lt" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Stannates ; Doping ; Trivalent praseodymium ; Photoluminescence ; Structural phase transitions
• 刊名：Journal of Luminescence
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：172
• 期：Complete
• 页码：323-330
• 全文大小：2208 K

文摘

A series of Pr³⁺-doped CaSnO₃, SrSnO₃ and Ca₂SnO₄ samples were prepared by a conventional high temperature solid-state reaction route. All samples were characterized by powder X-ray diffraction (XRD) analysis, photoluminescence (PL), photoluminescence thermal quenching (TQ) and fluorescence lifetime (FL) measurements. Moreover, luminous efficacies (LE) and color points according to the CIE 1931 color space diagram were calculated and discussed. The incorporation of Pr³⁺ ions into CaSnO₃ and SrSnO₃ host materials results in intense white luminescence, which originates from the mixture of green, orange and red emissions. Pr³⁺-doped Ca₂SnO₄ phosphor emits intense red light upon excitation. Temperature dependent luminescence lifetime measurements of SrSnO₃:Pr³⁺ phosphor showed abnormalities near 180 and 260 K, which confirm the existence of a low temperature structural phase transitions in SrSnO₃.