By a News Reporter-Staff News Editor at Science Letter -- New research on Luminescence is the subject of a report. According to news reporting originating from New Delhi, India, by NewsRx correspondents, research stated, "Blue emitting BaMgAl10O17:Eu2+ (BAM) phosphor is indispensable for Plasma Display panel and lighting because of high luminescence efficiency. However, thermal degradation (annealing in air at 500-600 degrees C) of BAM (upto similar to 30%) remains an intriguing problem for display industry worldwide."
Our news editors obtained a quote from the research from the Council of Scientific and Industrial Research (CSIR), "In the present study, a systematic approach is pursued to develop highly efficient BAM phosphor that exhibits least degradation, understand the role of Eu2+ site occupancy in such BAM phosphor and encapsulate individual phosphor grains with a shell of silica nanoparticles. The approaches lead to highly efficient BAM:Eu2+ phosphor that showed no degradation against thermal baking (annealing at 500 degrees C in air) for both UV and VUV radiation under UV and VUV excitation. An optimum solid state chemical route including precursor phases, dopant concentration, and thermal regimes has been evolved to develop BAM. Emission from Eu2+ occupying three different sites is identified with energetically stable anti Beevers Ross as the dominant contributor. Coating by nano sized amorphous silica sol with subsequent sintering lead to uniform silica shell."
According to the news editors, the research concluded: "This nano silica layer also helps to enhance the luminescence from phosphor grains."
For more information on this research see: Understanding and arresting degradation in highly efficient blue emitting BaMgAl10O17:Eu2+ phosphor-A longstanding technological problem. Journal of Luminescence, 2013;143():173-180. Journal of Luminescence can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Luminescence - www.elsevier.com/wps/product/cws_home/505700)
The news editors report that additional information may be obtained by contacting R. Shanker, CSIR, Natl Phys Lab, New Delhi 110012, India. Additional authors for this research include A.F. Khan, R. Kumar, H. Chander, V. Shanker and S. Chawla (see also Luminescence).
Keywords for this news article include: Asia, India, New Delhi, Luminescence
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