Luminescence spectra of pure and doped GaBo3 and LiGaO2
作者： Gradus J. Dirksen , Arthur N. J. M. Hoffman , Teus P. van de Bout , Maurice P. G. Laudy , George Blasse
DOI: 10.1039/JM9910101001
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摘要: The luminescences of GaBO3 and LiGaO2 are reported. former has GaIII in octahedral sites (calcite structure), the latter tetrahedral (ordered wurtzite structure). co-ordination number same influence on luminescence as case oxo-d0 complexes: lower number, higher energy first absorption band, larger Stokes shift, less mobile excited state. broad-band spectra with large shift indicate that nature optical transition involved is complicated. Dopants EuIII CrIII. They characterized by magnetic-dipole emission due to inversion symmetry site calcite. CrIII ion yields 2E at 4.2 K, contrast isomorphous ScBO3 where it 4T2 emission. dopant FeIII which an intense deep-red pronounced vibrational structure.
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