Crystal growth and luminescence properties of Yb-doped aluminate, gallate, phosphate and vanadate single crystals

A. Yoshikawa, M. Nikl, H. Ogino, J. B. Shim, V. V. Kochurikhin, N. Solovieva, T. Fukuda

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

(Lu 1-xYb x) 3Al 5O 12 (Yb:LuAG), (Y 1-xYb x)AlO 3 (Yb:YAP), (Y 0.9Yb 0.1)VO 4 (Yb:YVO) and Ca 8(La 1.98Yb 0.02)(PO 4) 6O 2 (Yb:CLPA) single crystals were grown from the melt. Typical double peak spectrum of the Yb 3+ Charge Transfer (CT) luminescence was observed in Yb-doped LuAG and YAP. Strong dependence of decay time and intensity on temperature was observed. Concentration quenching effect in Yb-rich Yb:YAP samples results in pronounced 1/e decay time shortening below 230 K, while above this temperature the decay curves are shaped mostly by the thermal quenching process. Double peak emission spectrum was not observed in Yb:YVO and Yb:CLPA. In the case of CLPA, under excitation in the Yb 3+ CT absorption band round 270 nm both the fast (6 ns decay time) and slow components (about 150 μs+600 μs decay times) are observed at room temperature. CLPA emission intensity was not decreasing with temperature between 80 and 300 K. Mixing of the Yb 3+ CT and CLPA excitonic states is proposed to explain this interesting phenomenon.

Original languageEnglish
Pages (from-to)76-80
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume537
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - 2005 Jan 21

Keywords

  • Charge transfer
  • Garnet
  • Luminescent
  • Perovskite
  • Scintillator
  • Single crystal growth from melt
  • Yb

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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