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Luminescence of Cu^{+} and Cu^{2+} Ions in CsBr Crystals

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Zorenko Y., Voznyak T., Turchak R.

issue 1

199-202

The luminescence of Cu^{+} and Cu^{2+} ions in CsBr:Cu and CsBr:CuBr_{2} crystals, respectively, is investigated under excitation by synchrotron radiation in the CsBr fundamental absorption range at 10 K and 300 K. The existence of the luminescence bands of different origin: (i) the intrinsic radiative transition of Cu^{+} ions in the bands peaked at 2.61 eV and 2.23 eV, (ii) the recombination luminescence of Cu^{2+} ions in the bands peaked at 2.55 eV and 2.13 eV, (iii) the luminescence of excitons localized around Cu^{+} and Cu^{2+} ions in the band peaked at 3.08 eV and 3.38 eV, respectively, was found in CsBr:Cu and CsBr:CuBr_{2} crystals. The energies of creation of exciton localized around Cu^{+} and Cu^{2+} ions (6.06 eV and 6.09 eV, respectively, at 10 K) and excitons bound with these ions (5.83 eV and 5.99 eV at 300 K) were determined as well.

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1 Acta Physica Polonica A

1 2010

1 Turchak R.

1 Voznyak T.

1 Zorenko Y.

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Luminescence of Cu^{+} and Cu^{2+} Ions in CsBr Crystals