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›› 2012, Vol. 12 ›› Issue (1): 177-180.

• 材料工程专栏 • 上一篇    

828 nm近红外光激发下Ho3+掺杂NaYF4的上转换发光性质

王雅静 张征 肖林久 谢颖   

  1. 沈阳化工大学物化教研室 沈阳化工大学应用化学学院 沈阳化工大学应用化学学院 沈阳化工学院应用化学学院
  • 收稿日期:2011-09-20 修回日期:2011-12-20 出版日期:2012-02-20 发布日期:2012-02-20
  • 通讯作者: 王雅静

Upconversion Luminescence of Ho3+ Doped NaYF4 Powder at 828 nm Laser Excitation

WANG Ya-jing ZHANG Zheng XIAO Lin-jiu XIE Ying,   

  1. College of Applied Chemisty, Shenyang University of Chemical Technology College of Material and Metallurgy , Northeast University College of Material and Metallurgy , Northeast University Applied Chemistry College Shenyang Institute of Chemical Technology
  • Received:2011-09-20 Revised:2011-12-20 Online:2012-02-20 Published:2012-02-20
  • Contact: WANG Ya-jing

摘要: 采用水热法合成了NaYF4:Ho3+上转换发光材料,用XRD、红外光谱、能谱及荧光光谱等对其进行表征,探讨了掺杂浓度、退火温度对上转换发光特性及晶型的影响. 结果表明,在828 nm近红外光激发下,在Ho含量0.7%(mol)、退火温度900℃时,样品的上转换发光效果最好,退火前样品发射蓝、黄光,700℃退火后,除发射蓝、黄光外,出现绿光的尖锐强峰,且温度越高其发光强度越高;退火温度为400℃时样品为a相和b相的混合相,随温度升高晶型转变为纯b相;Ho3+的上转换发光机制为能级跃迁,绿光、黄光、蓝光分别对应5F4,5S2?5I8, 5I5?5G6和3K8,5F3?5I8跃迁.

关键词: 上转换发光, NaYF4, Ho3+, 退火, 激发

Abstract: Trivalent Ho3+-doped NaYF4 up-conversion luminescence powder was synthesized. The effects of heat treatment temperature and concentration of Ho3+ on its structure, morphology and luminescent behavior were examined by XRD, FT-IR, EDX and upconversion luminescence. Characters are studied on the synthesis temperature and concentration. The strongest emission was obtained under the excitation of 828 nm laser when annealing temperature was 900℃ and Ho3+ concentration 0.7%(mol). Upconversion luminescence of yellow and blue light emissions was obtained under the excitation of 828 nm diode in NaYF4:Ho3+ before annealing, strong green was obtained after annealing at 700℃. The mixed crystals of phases α and b appeared after annealing at 400℃, and the pure phase b appeared after annealing at high temperature. The upconversion mechanisms are green, yellow and blue emissions corresponding to the transitions of 5F4,5S2?5I8, 5I5?5G6 and 3K8,5F3?5I8, respectively.

Key words: upconversion, NaYF4, Ho3+, annealing, excitation

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