钇对掺饵多孔硅体系1.54μm发光的增强作用 |
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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 |
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作者姓名: | 张晓霞 谢国伟 石建新 罗莉 黄伟国 龚孟濂 |
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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 |
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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 |
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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。
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关 键 词: | 硅 铒 钇 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 |
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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 |
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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. |
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Keywords: | porous silicon erbium yttrium co-doping near infrared photoluminescence |
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