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Anti-stokes luminescence in Pr3+ activated crystalline ZBLAN (Zr, Ba, La, Al & Na) fluoride phosphor

DSpace at IIT Bombay

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Title Anti-stokes luminescence in Pr3+ activated crystalline ZBLAN (Zr, Ba, La, Al & Na) fluoride phosphor
 
Creator CHATURVEDI, SS
DHOBLE, SJ
CHANDRA, BP
 
Subject infrared quantum counters
energy-transfer
up-conversion
upconversion
blue
red
green
fiber
ions
anti-stokes luminescence
up-conversion
zblan
 
Description Infrared-to-visible up-conversion in Pr3+ activated ZBLAN fluoride crystalline phosphors has been investigated at room temperature for different activator concentrations. In the excitation spectra as well as in the emission spectra, initially the intensity increases with activator concentration, attains an optimum value and then it decreases with further increase in the activator concentration. It seems that blue excitation of the phosphor is due to Excited State Absorption (ESA) mechanism. The 2nd power dependence of the blue fluorescence from the (3)p(0) state under IR pumping of (1)G(4) state indicates a dominant two photon ESA mechanism. The mechanism of anti-Stokes luminescence in an unique optical activator Pr3+ in the ZBLAN fluoride host material, is discussed.
 
Publisher INDIAN ASSOC CULTIVATION SCIENCE
 
Date 2011-08-02T10:07:06Z
2011-12-26T12:53:50Z
2011-12-27T05:40:53Z
2011-08-02T10:07:06Z
2011-12-26T12:53:50Z
2011-12-27T05:40:53Z
2005
 
Type Article
 
Identifier INDIAN JOURNAL OF PHYSICS AND PROCEEDINGS OF THE INDIAN ASSOCIATION FOR THE CULTIVATION OF SCIENCE, 79(4), 355-360
0973-1458
http://dspace.library.iitb.ac.in/xmlui/handle/10054/8756
http://hdl.handle.net/10054/8756
 
Language en