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钇对掺饵多孔硅体系1.54μm发光的增强作用
引用本文:张晓霞,谢国伟,石建新,罗莉,黄伟国,龚孟濂. 钇对掺饵多孔硅体系1.54μm发光的增强作用[J]. 化学学报, 2003, 61(9): 1430-1433
作者姓名:张晓霞  谢国伟  石建新  罗莉  黄伟国  龚孟濂
作者单位:1. 中山大学,光电材料与技术国家重点实验室,化学与化学工程学院,广州,510275;香港浸会大学物理系,香港,九龙塘
2. 香港浸会大学物理系,香港,九龙塘
3. 香港浸会大学物理系,香港,九龙塘;广东工业大学应用物理系,广州,510090
4. 香港浸会大学化学系,香港,九龙塘
基金项目:香港RGCEarmarkedGrant资助项目,广东省自然科学基金 (Nos.980 342 ,970 1 63),光电材料与技术国家重点实验室基金 (2 0 0 0 )资助项目
摘    要:首次报道了用恒电位电解法将饵、钇共掺入多孔硅(porous silicons, PS) 中,经高温退火处理后,观察到了在近红外区(1.54 μm)室温下较强的光致发光 (photoluminescence, PL),并与掺饵多孔硅(erbium-doped porous silicon, PS:Er)做了比较,发现钇的共掺入对掺饵多孔硅体系1.54 μm发射起了增强作用 。研究了饵、钇共掺杂多孔硅(erbium and yttrium co-doped porous silicon, PS:Er, Y)光致发光强度随温度的变化,发现PS:Er与Si:Er材料相似,有较强的 温度猝灭效应,而PS:Er,Y体系的PL强度随温度升高趋于平稳,且有增强的趋势, 受温度影响不明显,并初步探讨了其发光机制。

关 键 词:      掺杂  光致发光  电解  荧光猝灭剂
修稿时间:2003-01-23

Enhanced 1.54 μm Luminescence from Erbium and Yttrium Co-doped Porous Silicon
Affiliation:State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-sen University;Department of Chemistry, Hong Kong Baptist University;Department of Physics, Hong Kong Baptist University
Abstract:Fabrication of erbium (Er) and yttrium (Y) co-doped porous silicon (PS:Er,Y) is firstly reported. Enhancement of Er-related photoluminescence at 1.54 μm has been achieved by the co-doping of Y~ (3+) . The dependence of photoluminescence intensity on temperature was investigated. Luminescence quenching was observed for PS:Er, similar to that for Si:Er, while 1.54 μm luminescence intensity from PS:Er,Y was found to increase a little when the photoluminescence spectra were measured at a higher temperature. A possible enhanced photoluminescence mechanism was proposed.
Keywords:porous silicon   erbium   yttrium   co-doping   near infrared photoluminescence  
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