By a News Reporter-Staff News Editor at Journal of Technology -- Research findings on Advanced Material Research are discussed in a new report. According to news originating from New Delhi, India, by VerticalNews correspondents, research stated, "Novel red-emitting phosphors, Eu3+-doped Y2CaZnO5 (YCZ), were synthesized by modified urea assisted sol-gel combustion method. The X-ray diffraction analysis indicates the uniform formation of single-phase triclinic YCZ nanoparticles even when the concentration of Eu3+ ions is as high as 50 mol%."
Our news journalists obtained a quote from the research from the Council of Scientific and Industrial Research (CSIR), "TEM measurements revealed that the particles have uniform size distributions in the range of 10-30 nm. Luminescence properties have been characterized using photoluminescence excitation, emission spectra and decay time measurements. A strong charge transfer band (CTB) at around 250 nm is observed which is due to the Eu-O interaction in the host along with the 4f-4f excitation bands due to Eu3+ ions in UV and blue regions. The excitation bands at 395 nm (F-7(0) ? L-5(6)) and 465 nm (F-7(0) ? D-5(2)) are found to be stronger than the CTB for Eu3+:YCZ nanophosphor, which match very well with the emission wavelength of commercial InGaN blue LED chip."
According to the news editors, the research concluded: "Upon excitation to these wavelengths, a bright red emission from the D-5(0) level of Eu3+ ion is observed with CIE chromaticity coordinates (0.65, 0.34), which are found to be very close to the National Television System Committee (NTSC) for red phosphor (0.67, 0.33)."
For more information on this research see: Synthesis, Structural and Luminescent Properties of Novel Eu3+:Y2CaZnO5 Nanophosphor for White Light-Emitting Diodes. Science of Advanced Materials, 2013;5(11):1539-1545. Science of Advanced Materials can be contacted at: Amer Scientific Publishers, 26650 The Old Rd, Ste 208, Valencia, CA 91381-0751, USA. (American Scientific Publishers - www.aspbs.com/)
The news correspondents report that additional information may be obtained from R. Rajeswari, CSIR, Natl Phys Lab, New Delhi 110012, India. Additional authors for this research include L. Jyothi, C.K. Jayasankar, S.S. Babu, N. Vijayan and D. Haranath.
Keywords for this news article include: Asia, India, New Delhi, Advanced Material Research
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