徐超,卢佃清,邵理堂,刘学东

• 1:淮海工学院理学院

摘要(Abstract)：

采用高温固相法制备了Sr0.96Al2O4:Eu0.02,Dy0.02,B0.08长余辉发光材料。研究了两步退火工艺中第二次退火温度对其晶体结构、激发光谱、发光光谱、余辉衰减特性、拉曼光谱和热释光光谱的影响。结果表明,随着第二次退火温度的升高,Dy Sr˙陷阱中的电子浓度逐渐增加,发光动力学级次逐渐增大,这有利于提高长余辉特性;样品的拉曼光谱峰值随退火温度的变化与V O˙˙浓度随退火温度的变化一致,这一点验证了长余辉发光材料的电子陷阱模型的有效性。在余辉测试时间内,第二次退火为1400℃×6 h的样品具有最大的余辉亮度,这源于它具有最大的Dy Sr˙陷阱中的电子浓度以及适中的时间衰减常数。

关键词(KeyWords)： 铝酸盐;长余辉发光材料;电子陷阱模型;拉曼光谱

Abstract:

Keywords:

基金项目(Foundation): 江苏省高校自然科学研究计划项目(06KJD430014);; 淮海工学院校内科研课题资助项目(Z2011040);; 江苏省“十二五”高等学校重点专业支持项目(苏教高2012-16-340)

作者(Author): 徐超,卢佃清,邵理堂,刘学东

DOI: 10.13289/j.issn.1009-6264.2014.02.004

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