Effects of pre-anneal treatment on the optical characteristics of lead tungstate single crystal

Do Hyung Kim, Hee Sun Yang, Kyung Dong Chang, Hyo Yeol Park, Myoung Bok Lee, Jin Ho Lee, Yoon Ho Song, Young Rae Cho, Sang Yun Lee

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We present the pre-annealing growth condition dependence of the optical properties of lead tungstate PbWO4 (shortly, PWO) single crystal. The colors of PWO crystals were influenced by the pre-annealing time before melting of initial powder. The oxygen vacancy of PWO single crystal constituents is suggested to be mainly responsible for the yellowish coloration that is related to the absorption band around 430nm. The ratio of lead and oxygen vacancy might also affect the PWO coloration. PbWO4 single crystals grown by the different growth conditions have shown a slight different lattice parameter confirmed by X-ray diffraction method (XRD). Photoluminescence (PL) intensities of the yellowish PWO were weaker than the colorless one. It is assumed that there are different main trap levels related to the yellowish PWO single crystal compared to colorless ones through thermoluminescence (TL) measurements.

Original languageEnglish
Pages (from-to)117-122
Number of pages6
JournalJournal of Crystal Growth
Volume226
Issue number1
DOIs
StatePublished - Jun 2001

Keywords

  • A1. Annealing
  • A1. Thermoluminescence
  • A2. Czochralski method
  • B1. Lead tungstate
  • B3. Scintillators

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