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Inorganic Materials

, Volume 41, Issue 7, pp 779–783 | Cite as

Effect of Bi Doping on the Optical Properties of CdI2

  • I. M. Kravchuk
  • S. S. Novosad
  • A. M. Voitsekhovskaya
Article

Abstract

The effect of Bi impurity on the optical absorption and roentgeno-, photo-, and thermoluminescence spectra of CdI2 crystals grown by the Bridgman-Stockbarger method is studied. CdI2 activation with BiI3 produces a number of absorption bands related to electronic transitions of Bi3+. Bi produces no emission centers in CdI2. The 550- to 560-nm luminescence of CdI2 is due to the radiative recombination of self-trapped anion excitons. The observed changes in spectral distribution and the reduction in light yield upon CdI2 activation with Bi3+ are mainly due to the reabsorption of emission from native centers by activator centers. Under x-ray excitation, CdI2: Bi3+ accumulates a small light sum at shallow trap levels related to native defects.

Keywords

Light Yield Radiative Recombination Native Defect Emission Center Trap Level 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© MAIK “Nauka/Interperiodica” 2005

Authors and Affiliations

  • I. M. Kravchuk
    • 1
  • S. S. Novosad
    • 2
  • A. M. Voitsekhovskaya
    • 2
  1. 1.Lviv National Polytechnical UniversityLvivUkraine
  2. 2.Franko National UniversityLvivUkraine

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