Abstract
Vibrational and elastic properties of Ba3Si6O12N2 and Ba3Si6O9N4 are investigated to aiming at the understanding the difference in luminescence and thermal quenching behaviour of Ba3Si6O12N2:Eu (green luminescence with weak thermal quenching) and Ba3Si6O9N4:Eu (blue–green luminescence with strong thermal quenching). Computed results indicate no significant differences between Ba3Si6O12N2 and Ba3Si6O9N4, suggesting that the difference in thermal quenching may be explained by auto-ionization model rather than configurational coordinate diagram.
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