BARC/PUB/09/0737

 
  Characterization, luminescence and EPR investigations of Eu2+ activated strontium aluminate phosphor  
     
 
Author(s)

Singh, V.; Zhu, J. J.; Tiwari, M.; Soni, M.; Aynayas, M.; Hyun, S. H.; Narayanan, R.; Mohapatra, M.; Natarajan, V.

ABSTRACT

Strong blue-green light emitting Eu doped SrAl2O4 phosphor was synthesized by a low-temperature initiated, self-propagating and gas producing combustion process in a very short time (<5 min). The prepared powder was characterized by X-ray diffraction, Fourier-transform infrared spectrometry and scanning electron microscopy. The excitation spectrum shows a peak at 397 nm. Upon excitation at 397 nm, the emission spectrum exhibits a well defined broad band with maximum at 493 nm corresponding to 4f65d®4f7 transition. Electron paramagnetic resonance (EPR) measurements at X-band showed low field signals due to Eu2+ ions in SrAl2O4:Eu.

 
 
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