CaS∶Eu, Sm光存储材料的光谱特性

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摘要： CaS∶Eu, Sm是一种典型的电子俘获型光存储材料，文章采用湿法在还原气氛中制备了CaS∶Eu, Sm粉末样品。测量了这种光存储材料的XRD、激发光谱、发射光谱、光激励发光光谱、热释光谱以及光激励发光衰减曲线。XRD结果表明样品在1 050 ℃晶格已经形成。光谱测试结果说明紫外光可激发该材料，作为信息写入光源。样品被紫外光源饱和激发后，用980 nm红外激光激励，发射出峰值位于635 nm的红光。光激励发光起初衰减较快，随后有一个较长的平缓期。且样品具有合适深度的陷阱能级，能够稳定存储信息。对CaS∶Eu, Sm的光存储机理进行了探讨。

关键词：CaS∶Eu;Sm;光存储;光谱

Abstract：As a typical optical storage material, CaS∶Eu, Sm powders were prepared by wet method in a reduced atmosphere. XRD，emission spectrum, excitation spectrum, photostimulated spectrum, thermal spectrum, and decay curve were measured. The XRD indicates that the lattice of CaS∶Eu, Sm was formed at 1 050 ℃. Spectra analysis results show that UV can excite the sample as an information input source. When excited by ultraviolet lamp and then stimulated by 980 nm laser, the same luminescence with peaks at 635 nm. The photostimulated emission decayed rapidly at first and then slowly. The trap level is deep and can make electrons stable in the trap. The optical storage mechanism of CaS∶Eu, Sm is discussed.

Key words：CaS∶Eu;Sm;Optical storage;Spectra

收稿日期: 2006-06-16 修订日期: 2006-09-18

中图分类号:

TQ422

通讯作者: 姜薇薇 E-mail: rosejiangwei@126.com

引用本文:

姜薇薇¹,徐征¹,张希艳². CaS∶Eu, Sm光存储材料的光谱特性[J]. 光谱学与光谱分析, 2007, 27(12): 2389-2392.
JIANG Wei-wei¹,XU Zheng¹,ZHANG Xi-yan². Spectral Characteristics of Optical Storage Material CaS∶Eu, Sm . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(12): 2389-2392.

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https://www.gpxygpfx.com/CN/Y2007/V27/I12/2389