Luminescent properties of LaKNaTaO₅ and rare-earth-doped LaKNaTaO₅ synthesized by an improved hydroxide melt method

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• 作者：Yanyan Du ; Long Yuan ; Keke Huang ; ^{kkhuang@jlu.edu.cn} ; Shouhua Feng
• 关键词：Tantalates ; Crystal growth ; Photoluminescence properties ; Hydroxide flux
• 刊名：Journal of Luminescence
• 出版年：2013
• 出版时间：March, 2013
• 年：2013
• 卷：135
• 期：Complete
• 页码：196-200
• 全文大小：685 K

文摘

Single crystals of LaKNaTaO₅ is facilely obtained in corundum crucible at 600 ¡ãC by adding a certain amount of water to the hydroxide flux of KOH/NaOH additionally, which is a green method to avoid the heavy metal silver pollution compared with the silver tuber. The addition of water plays a critical role in the reaction process by changing the auto-dissociation of OH^? in hydroxide melts. In addition, we have synthesized samples doped with Eu³⁺ and Tb³⁺ by the same route respectively and have investigated the effects of concentration and temperature on the photoluminescence (PL) properties. The results demonstrate that rare-earth-doped LaKNaTaO₅ is an ideal material for white light emitting diodes (WLEDs).