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Synthesis And Uv, Vuv Photoluminescence Of Red Emitting Borate Host Pdp Phosphors Ycabo4: Eu3+ And Ybo3:Eu3+

Author: 
Ingle, J. T., Sonekar, R. P., Nagpure, P. A. and Omanwar, S. K.
Subject Area: 
Physical Sciences and Engineering
Abstract: 

The Orange red and red emitting borate host phosphor YCaBO4: Eu3+ and YBO3: Eu3+ has been prepared by a novel solution combustion technique. The synthesis is based on the exothermic reaction between the fuel (Urea) and Oxidizer (Ammonium nitrate).The Heat evolved in reaction is utilized for auto combustion. The photoluminescence properties of the powder samples of YCaBO4: Eu3+ and YBO3: Eu3+ has been investigated under UV and VUV excitation. The phosphor shows strong absorption in UV and VUV region and exhibits intense red emission upon excited by 254 nm UV and 173 nm VUV radiation. Under UV 254 nm excitation, YCaBO4: Eu3+ and YBO3:Eu3+ exhibits intense red emission around 610 nm. Under VUV excitation of 173 nm, the phosphor emits intense red emission around 610 nm and few weak emissions. These weak emissions could be suppressed by annealing the sample repeatedly at proper temperature and both the borate phosphor YCaBO4: Eu3+ and YBO3:Eu3+could be a good red emitting phosphor for PDP display applications and mercury free lamps.

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