Chemical Research in Chinese Universities ›› 2015, Vol. 31 ›› Issue (3): 427-429.doi: 10.1007/s40242-015-4460-4

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Long Lasting Phosphorescence Properties and Multi-peak Fitting on Thermoluminescence of Red LaAlO3: Eu3+ Phosphor

ZUO Yinyan1, CHEN Xia2, LIU Xiaobin1   

  1. 1. Department of Physics, Tianshui Normal University, Tianshui 741000, P. R. China;
    2. College of Physical Science and Technology, Lanzhou University, Lanzhou 730000, P. R. China
  • Received:2014-12-03 Revised:2014-12-22 Online:2015-06-01 Published:2015-05-22
  • Contact: ZUO Yinyan E-mail:zuoyinyan@163.com
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.11264033) and the Science Research Foundation of Tianshui Normal University, China(No.TSA1108).

Abstract:

Red long lasting phosphorescence(LLP) was firstly observed in LaAlO3:Eu3+ phosphor synthesized by solid state method at 1773 K. It reveals that the Eu3+ ions occupy the asymmetric La3+ sites, resulting in the orange-red emission of Eu3+. The LLP of the optimum LaAlO3:0.6%Eu3+ sample can come to about 2000 s according to a definition of 0.32 mcd/m2. The LLP decay curve can not be fitted even by a function of three exponential terms, due to the complicated retrapping process of carriers. The result of a classical multi-peak fitting method on thermoluminescence reveals that the excellent LLP performance of LaAlO3:Eu3+ material originates from the rich distribution of shallow traps(E=0.7875 eV).

Key words: LaAlO3:Eu3+, Long lasting phosphorescence, Luminescence