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Temperature dependence of structural and luminescent properties of Tb~(3+) doped YPO_4

机译：Tb〜（3+）掺杂YPO_4的结构和发光性能与温度的关系

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The solution precipitation is used to synthesize the Tb doped yttrium phosphates. The as-synthesized is the monoclinic phased YPO_4·2H_2O with churchite-type structure, which is transformed to the tetragonal phased YPO_4 with xenotime-type structure as the temperature approaches 200 ℃ during the thermal treatment process. This phase transformation process can not be observed in some routes that need a higher synthetic temperature, in which, only a high-temperature phase is obtained. The luminescent efficiency dependence on the heat-treatment temperature is investigated. The luminescent efficiency presents a two-step increase respectively around 300 and 700 ℃. Results indicate that the significant increase of luminescent efficiency at 300 ℃ is not related to the phase structure transformation, but to the decrease of OH~- ions content, and that the significant increase of luminescent efficiency at 700 ℃ is related to the increase of crystallinity, which may increase the absorption to VUV light.

机译：溶液沉淀用于合成掺the的磷酸钇。合成后为单斜晶相YPO_4·2H_2O，具有教堂岩型结构，随着热处理过程温度升高至200℃，该相转变为异六面体型四方相YPO_4。在某些需要更高合成温度的路线中，无法观察到这种相变过程，在这些路线中，只能获得高温相。研究了发光效率对热处理温度的依赖性。发光效率分别在300℃和700℃左右呈两步上升。结果表明，在300℃下发光效率的显着提高与相结构的变化无关，但与OH〜-离子含量的降低无关；在700℃下发光效率的显着提高与结晶度的提高有关，这可能会增加对VUV光的吸收。

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来源
《ICO20: Display Devices and Systems》|2005年|P.60300M.1-60300M.8|共8页
会议地点 Changchun(CN)
作者
Weihua Di; Xiaojun Wang; Baojiu Chen; Xiaoxia Zhao; Guozhong Ren; Qingyu Meng; Yanmin Yang; Huasheng Lai; Shaozhe LUE;
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作者单位

Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics Physics, Chinese Academy of Sciences, Changchun 130033, P. R. China;

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会议组织
原文格式 PDF
正文语种 eng
中图分类光学仪器;计算技术、计算机技术;
关键词
plasma display panel; vacuum ultraviolet; structure transformation; Tb~(3+); OH group; luminescence;

机译：等离子显示板真空紫外结构转变Tb〜（3+）OH基发光;

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Temperature dependence of structural and luminescent properties of Tb~(3+) doped YPO_4

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