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纳米晶ZrO2:Pr^3+与ZrO2:Pr^3+,Sm^3+发光研究
引用本文:刘金霞,吕树臣,李秀明.纳米晶ZrO2:Pr^3+与ZrO2:Pr^3+,Sm^3+发光研究[J].光谱学与光谱分析,2006,26(4):605-609.
作者姓名:刘金霞  吕树臣  李秀明
作者单位:[1]哈尔滨师范大学物理系,黑龙江哈尔滨150080 [2]浙江万里学院,浙江宁波305101
基金项目:黑龙江省普通高校骨干教师资助计划项目和哈尔滨师范大学科研基金(2001j01)资助项目
摘    要:采用化学共沉淀法制备了纳米晶ZrO2:pr^3+粉体,所制备的纳米晶ZrO2:Pr^3+粉体中Pr^3+的强室温特征发射的两个主发射带为^1D2-^2H4和^3P0-^3H4跃迁。不同热处理温度下纳米晶ZrO2:Pr^3+晶体结构不同,因此它们的发光不同;ZrO2基质向Pr^3+有能量传递,在高温煅烧得到的单斜相配位场中能量传递较好。荧光强度与Pr^3+浓度的关系研究表明:^3P0和^1D2功能级有不同的猝灭规律,由于^1D2,^3H4]→^1G4,^3F4]的交叉弛豫,使得^1D2-^3H4跃迁的猝灭浓度很低,在我们的实验中,掺0.1mol%Pr^3+时^1D2-^3H4地跃迁发射最强,掺2mol%Pr^3+时^3R0-^3H4跃迁发射最强。文章制备的纳米晶ZrO2:Pr^3+,Sm^3+中Sm^3+的^4G(5-2)~^6H(7/2)跃迁荧光峰因Pr^3+加入而增强,这除了两种离子某些能级相近产生荧光发射的叠加效应外,还存在Pr^3+→Sm^3+的能量传递。

关 键 词:光致发光  共沉淀法  纳米晶ZrO2:Pr^3+  ZrO2:Pr^3+  Sm^3+  能量传递
文章编号:1000-0593(2006)04-0605-05
收稿时间:2004-12-28
修稿时间:2005-05-30

Preparation and Luminescence of Nanocrystalline ZrO2
LIU Jin xia, LUE Shu-chen , LI Xiu-ming.Preparation and Luminescence of Nanocrystalline ZrO2[J].Spectroscopy and Spectral Analysis,2006,26(4):605-609.
Authors:LIU Jin xia  LUE Shu-chen  LI Xiu-ming
Institution:1. Department of Physics, Harbin Normal University, Harbin 150080, China; 2. Zhejiang Wanli University, Ningbo 305101, China
Abstract:The nanocrystalline ZrO2 : Pr3+ and ZrO2 : Pr3+, Sm3+ powders with room temperature sharp characteristic emissions were prepared by coprecipitation method. Luminescence properties of nanocrystalline ZrO2 : Pr3+ with different sintering temperatures and doping concentrations were studied. The energy transfer between the nanocrystalline ZrO2 host and the dopants was observed. The different Pr3+ concentration dependence of emission intensities of levels 3P0 and 1D2 was discussed. The dependence on Pr3+ concentration in nanocrystalline ZrO2 : Pr3+, Sm3+ of the emission intensity of 4G(5/2)-6H(7/2) transitions of Sm3+ ions and the energy transfer between Pr3+ and Sm3+ ions were investigated and discussed.
Keywords:
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