Applied Physics A

, 125:771 | Cite as

Investigation of new color-tunable up-conversion phosphors and their long-persistent luminescence properties for potential biomedical applications

  • Xinquan Zhou
  • Guifang JuEmail author
  • Tiansong Dai
  • Yang Li
  • Haoyi Wu
  • Yihua HuEmail author


Long-persistent phosphor and up-conversion particles used for optical imaging continue to interest researchers. The present work identifies an Er3+ doped micro-sized CSAO-CSO mixed material that exhibits both up-conversion and persistent luminescence. The cross-relaxation that occurs among Er3+ ions contributes to enhancing the up-conversion intensity. The Tm3+/Ho3+ co-doped strategy was used to induce tunable up-conversion colors. The cross-relaxation process corresponding to the energy transfer mechanism was investigated via the luminescence lifetimes of Er3+. Moreover, the persistent luminescence and thermo-luminescence properties of CSAO-CSO: Er3+ were also investigated systematically. Our results combine the fields of up-conversion and persistent luminescence, which may support other explorations of new kinds of long-persistent and up-conversion materials.



The authors acknowledge the financial support from the National Natural Science Foundation of China (No.51972065).

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest.

Supplementary material

339_2019_3030_MOESM1_ESM.docx (1 mb)
Supplementary material 1 (DOCX 1035 kb)


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© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Physics and Optoelectronic EngineeringGuangdong University of TechnologyGuangzhouChina

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