采用溶胶-凝胶技术通过添加Ce(NO3)3制备了掺杂Ce3+离子的纳米SiO2材料,利用红外光谱、紫外-可见吸收光谱以及电子能谱等研究样品成分,并对不同热处理条件下样品的光致发光性能进行研究.结果表明,低温处理条件下样品中存在一定量的OH羟基,并且样品中的Ce离子主要以Ce3+的形式存在.在100-500℃较低温度下热处理的样品中存在两个峰值相近的光致发光带,最大值为344nm和357nm,其对应的最大激发峰分别为226nm和252nm.其中,344nm光致发光带起源于基体SiO2的缺陷中心,而357nm光致发光带起源于Ce3+的一种类液发光.
参考文献
| [1] | Linards Skuja .The origin of the intrinsic 1.9eV luminescence band in glassy SiO2[J].Journal of Non-Crystalline Solids,1994,179:51-69. |
| [2] | Sakurai Y. .The 3.1 eV photoluminescence band in oxygen-deficient silica glass[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2000(3):218-223. |
| [3] | Anedda A.;Cannas M.;Corpino R.;Gelardi FM.;Leone M.;Boscaino R. .EXPERIMENTAL EVIDENCE OF THE COMPOSITE NATURE OF THE 3.1 EV LUMINESCENCE IN NATURAL SILICA[J].Nuclear Instruments and Methods in Physics Research, Section B. Beam Interactions with Materials and Atoms,1996(1/4):360-363. |
| [4] | 饶海波,成建波,杨开愚,黄宗琳.红色显示用单晶荧光体[J].光学学报,1999(05):683-688. |
| [5] | 陈述春.电子俘获材料的光学性质及光存储机制研究[J].光学学报,1995(06):749. |
| [6] | Bi HJ.;Zhang LD.;Cai WP. .Reversible emission enhancement for Ce3+-doped silica nanoparticles dispersed within pores of mesoporous silica[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2000(9):1495-1501. |
| [7] | Knitel M J;Dorenbos P;Combes C M et al.Luminescence and storage properties of LiYSiO4:Ce[J].Journal of Luminescence,1996,69:325-334. |
| [8] | Z. Mazurak;A. Ratuszna;Ph. Daniel .Luminescence properties of Pr~(3+) and Ce~(3+) in KCaF_3 single crystals[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,1999(2):163-171. |
| [9] | Verweij JWM.;Bouttet D.;Lautesse H.;Moine B.;Pedrini C.;Cohenadad MT. .LUMINESCENCE PROPERTIES OF GDA1O(3)CE POWDERS - DEPENDENCE ON REDUCTION CONDITIONS[J].Chemical Physics Letters,1995(1/3):51-55. |
| [10] | Dotsenko VP.;Efryushina NP.;Berezovskaya IV.;Voloshinovskii AS. .Luminescence properties of Ce3+ ions in magnesium fluoroborate Mg3BO3F3[J].Materials Chemistry and Physics,2003(1):141-146. |
| [11] | Sakurai Y.;Nagasawa K. .Radial distribution of some defect-related optical absorption and PL bands in silica glasses[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2000(2/3):82-90. |
| [12] | Tanabe T;Fujiwara M;Iida T et al.Neutron-induced luminescence of insulators[J].Fusion Engineering and Design,1995,29:435-441. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%