Pb2+ Ions Doping Induced Cooperative Luminescence Quenching of Yb3+-trimers in CaF2

Aidilibike Tuerxun, Yu Yang, Dan Zhao, Wei Ping Qin

Research output: Contribution to journalArticlepeer-review

Abstract

At room temperature, the ultraviolet (UV) upconversion emissions from CaF2: Pb2+, Yb3+ were observed under the excitation of 978 nm near infrared (NIR) laser. The upconversion emission peak is centered at 383 nm, which is ascribed to the 3P01A1g (1S0) transition of Pb2+ ions. Through the results of transient measurements, the upconversion process of Pb2+ ions is confirmed. The energy transfer process is that three excited Yb3+ ions simultaneously transfer their energy to one Pb2+ ion. With the increasing of Pb2+ concentration, the cooperative luminescence from Yb3+ clusters decreases gradually. In order to explain this phenomenon, we propose a new cooperative luminescence quenching mechanism in this paper, which is originated from Pb2+ induced structure destruction of Yb3+-trimers. The fluorescence quenching in Pb2+ and Yb3+ codoped CaF2 is given a reasonable explanation.

Original languageEnglish
Pages (from-to)1280-1286
Number of pages7
JournalChinese Journal of Luminescence
Volume38
Issue number10
DOIs
StatePublished - 1 Oct 2017
Externally publishedYes

Keywords

  • Cooperative sensitization
  • Pb ions
  • UV upconversion luminescence
  • Yb-trimers

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