Optical study of the defect stability in Tl‐doped potassium iodide | Zendy

Rzepka E. | Zendy; Lefrant S. | Zendy; Taurel L. | Zendy

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Optical study of the defect stability in Tl‐doped potassium iodide

Author(s) -

Rzepka E.,

Lefrant S.,

Taurel L.

Publication year - 1986

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2221350115

Subject(s) - raman spectroscopy , thallium , electron paramagnetic resonance , iodine , thermal stability , doping , iodide , quenching (fluorescence) , ion , chemistry , analytical chemistry (journal) , materials science , radiochemistry , inorganic chemistry , nuclear magnetic resonance , fluorescence , optics , optoelectronics , physics , organic chemistry , chromatography

The thermal stability of the centres created in KI : Tl crystals submitted to an ionizing radiation at room temperature is studied. It is observed that F centres are transformed at room temperature, giving rise to more complex centres, unidentified either by EPR or Raman spectroscopy. The complementary hole centres consist of polyiodides in a low concentration and other complexes implying thallium and iodine interstitials. A recombination between some of these centres occurs at 127 °C. A quenching at LNT of a coloured sample annealed at 127 °C < T < 170 °C shows, by means of Raman experiments, that interstitials are still present since I − 3 ions are observed in large concentration.

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