高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (5): 750.

• 论文 • 上一篇    下一篇

掺铕多孔硅的恒电位电解法制备及其光致发光

龚孟濂1, 曾春莲1, 石建新1, 黄伟国2, 谢国伟3, 郑婉华3   

  1. 1. 中山大学化学与化工学院, 广州 510275;
    2. 香港浸会大学化学系, 香港;
    3. 香港浸会大学物理系, 香港
  • 出版日期:1999-05-24 发布日期:1999-05-24
  • 通讯作者: 龚孟濂,男,52岁,副教授.
  • 作者简介:龚孟濂,男,52岁,副教授.
  • 基金资助:

    香港浸会大学研究基金(FRG/95-96/Ⅱ-31);广东省自然科学(批准号:970163)资助课题

Preparation of Europium doped Porous Silicon by Constant potential Electrolysis and Photoluminescence of Porous Silicon∶Eu

GONG Meng-Lian1, ZENG Chun-Lian1, SHI Jian-Xin1, WONG Waikwok2, CHEAH Kokwai3, ZHENG Wan-Hua 3   

  1. 1. School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou, 510275;
    2. Department of Chemistry, HongKong Baptist University, HongKong;
    3. Department of Physics, HongKong Baptist University, HongKong
  • Online:1999-05-24 Published:1999-05-24

PDF (PC)

被引次数

6

摘要： 首次报道掺稀土多孔硅的恒电位电解法和稀土硝酸盐-支持电解质-非乙醇有机溶剂的电解体系.这一新方法和新体系具有易于控制电解产物,可掺入高浓度稀土(1021/cm3以上),自主控制掺入稀土的浓度并显著增强多孔硅室温光致发光的优点.研究了溶剂、外加电压、Eu(NO3)3浓度及电解时间对多孔硅(PS)室温光致发光的影响,优化了恒电位电解法制备掺铕多孔硅的条件,获得了室温光致发光强度高于多孔硅的PS∶Eu,实验发现,掺Eu后波长蓝移.讨论了多孔硅和掺铕多孔硅的光致发光机制.

关键词: 多孔硅, 铕, 恒电位电解, 光致发光

Abstract: Anovel electrochemical approach, constant potential electrolysis and a new electrolyte system, rare earth nitrate supporting electrolyte substance nonethanol organic solvent, for doping of porous silicon(PS) with europium were reported. By this approach and system, the doping products were well controlled, and a high concentration of Eu(about 1021/cm3) was doped into PS. The effects of solvents, applied voltage, concentration of Eu(NO3)3and doping time on photoluminescence of Eu doped PS were investigated, and the optimum doping conditions were optimized. PS∶Eu prepared under suitable conditions was found to emit much more intense visible room temperature luminescence with blue shift in wavelength than that of corresponding PS wafer. The photoluminescence mechanism for PSand PS∶Eu was also discussed.

Key words: Porous silicon, Europium, Constant potential electrolysis, Photoluminescence

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