Pressure dependence of the Sr sub(2)Si sub(5)N sub(8):Eu super(2+) luminescence

In this study high pressure spectroscopy of Sr sub(2)Si sub(5)N sub(8):Eu super(2+) is presented. The luminescence spectra of Sr sub(2)Si sub(5)N sub(8):Eu super(2+) are the superposition of two bands related to the 4f super(6)5d super(1) arrow right 4f super(7) transitions in Eu super(2+) occupying...

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Bibliographic Details
Published in:Journal of luminescence 2015-03, Vol.159, p.183-187
Main Authors: Lazarowska, Agata, Mahlik, Sebastian, Grinberg, Marek, Yeh, Chiao-Wen, Liu, Ru-Shi
Format: Article
Language:English
Subjects:
Band spectra
Bands
Emission spectroscopy
Energy transfer
Luminescence
Pressure dependence
Spectra
Spectroscopy
Temperature dependence
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Summary:In this study high pressure spectroscopy of Sr sub(2)Si sub(5)N sub(8):Eu super(2+) is presented. The luminescence spectra of Sr sub(2)Si sub(5)N sub(8):Eu super(2+) are the superposition of two bands related to the 4f super(6)5d super(1) arrow right 4f super(7) transitions in Eu super(2+) occupying tenfold coordinated site (Sr1) and eightfold coordinated site (Sr2). Pressure diminished the energy of the emission bands with the rate equal to -3.9 cm super(-1)/kbar and -2.9 cm super(-1)/kbar for Eu(Sr1) and Eu(Sr2) respectively. Detailed analysis of pressure and temperature dependence of the luminescence and luminescence kinetics showed that pressure causes increasing of nonradiative energy transfer from the Eu(Sr1) to Eu(Sr2).
ISSN:0022-2313
DOI:10.1016/j.jlumin.2014.11.026