物理化学学报 >> 2011, Vol. 27 >> Issue (10): 2427-2431.doi: 10.3866/PKU.WHXB20110928

光化学和辐射化学 上一篇    下一篇

Bi3+掺杂对YVO4:Yb3+近红外发光的敏化作用

肖全兰1, 孟建新1,2, 谢丽娟1, 张蕤1   

  1. 1. 暨南大学化学系, 广州 510632;
    2. 暨南大学纳米化学研究所, 广州 510632
  • 收稿日期:2011-06-15 修回日期:2011-07-04 发布日期:2011-09-27
  • 通讯作者: 孟建新 E-mail:tmjx@jnu.edu.cn
  • 基金资助:

    国家自然科学基金(30670523)和中央高校基本科研业务费专项资金资助项目

Near-Infrared Luminescence Enhancement by Co-Doped Bi3+ in YVO4:Yb3+

XIAO Quan-Lan1, MENG Jian-Xin1,2, XIE Li-Juan1, ZHANG Rui1   

  1. 1. Department of Chemistry, Jinan University, Guangzhou 510632, P. R. China;
    2. Intitute of Nanochemistry, Jinan Univesity, Guangzhou 510632, P. R. China
  • Received:2011-06-15 Revised:2011-07-04 Published:2011-09-27
  • Contact: MENG Jian-Xin E-mail:tmjx@jnu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (30670523) and Central University by Basic Scientific Research Business Expenses, China.

摘要: 用高温固相法合成了Yb3+、Bi3+共掺的YVO4, 研究了Bi3+的掺入对YVO4:Yb3+发光光谱的影响和近红外发光的敏化作用. X射线衍射图谱研究表明: 掺入Yb3+、Bi3+之后, 基质YVO4的晶格结构没有发生明显变化. Bi3+的掺入不仅显著增强了样品中Yb3+的特征远红外发光强度, 还使YVO4:Yb3+激发光谱的范围红移, 当Bi3+掺入的摩尔分数从0增加到0.05时, 样品的最强激发峰位置从335 nm红移至352 nm, 激发光谱范围由300-360 nm扩宽至300-430 nm. 优化的Bi3+掺入量为0.03. 初步讨论了VO43-, Bi3+和Yb3+间的能量传递机理. 结果表明Bi3+的共掺使YVO4:Yb3+样品对长波紫外光的响应性能大大改善, 作为一种基于量子剪裁的光谱转换材料, 可以更好地匹配太阳光的能量谱, 有助于提高硅太阳能电池的光电转换效率.

关键词: 近红外发光, 固相法, 能量下转换, YVO4:Yb3+,Bi3+

Abstract: The near-infrared (NIR) luminescence phosphor Yb3+,Bi3+ co-doped YVO4 was prepared by a conventional solid state method and the sensitization of Yb3+ near-infrared luminescence by Bi3+ was investigated. By co-doping with Bi3+ from 0 to 0.05 the characteristic NIR luminescence of Yb3+ in the YVO4 matrix was greatly enhanced and the strongest site of the excitation wavelength red-shifted from 335 to 352 nm while the wavelength range of the excitation spectrum broadened from 300-360 to 300-430 nm. The optimized Bi3+ content is 0.03. The possible energy transfer mechanism among VO43-, Bi3+ , and Yb3+ was discussed. We conclude that the NIR luminescence of YVO4:Yb3+ can be remarkably improved by co-doping with Bi3+ and its absorbance matches better with the solar energy spectrum. YVO4:Yb3+, Bi3+ is a promising spectral converter for silicon solar cells and it is expected to improve the photoelectric conversion efficiency.

Key words: Near-infrared luminescence, Solid state reaction, Energy down-conversion, YVO4:Yb3+,Bi3+

MSC2000: 

  • O644