Chemija / Chemistry
 ISSN 0235-7216 ISSN 2424-4538 (online) |
2009 m. Nr. 3 Sol–gel synthesis of RE3+-activated CaWO4 phosphores
A series of red-emitting phosphores containing CaWO4 : RE (RE = Tb3+, Eu3+, Sm3+) was prepared by an aqueous sol–gel method using tungsten (VI) oxide, WO3, calcium nitrate tetrahidrate, Ca(NO3)2 · 4H2O, terbium oxide, Tb4O7, europium oxide, Eu2O3, and samarium oxide, Sm2O3 as starting materials. Synthesized ceramics were characterized using infrared spectroscopy (IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL) measurements. The obtained results clearly show that only CaWO4 : Eu phosphor can be effectively excited under photoexcitation at 280, 360 and 460 nm and exhibits red emission in the vicinity of 620 nm. : CaWO4 phosphores, sol–gel synthesis, lanthanide doping, photoluminescence |
Issues:
2017 - Vol.28 No. 1, No. 2, No. 3, No. 4 2016 - Vol.27 No. 1, No. 2, No. 3, No. 4 2015 - Vol.26 No. 1, No. 2, No. 3, No. 4 2014 - Vol.25 No. 1, No. 2, No. 3, No. 4 2013 - Vol.24 No. 1, No. 2, No. 3, No. 4 2012 - Vol.23 No. 1, No. 2, No. 3, No. 4 2011 - Vol.22 No. 1, No. 2, No. 3, No. 4 2010 - Vol.21 No. 1, No. 2-4 2009 - Vol.20 No. 1, No. 2, No. 3, No. 4 2008 - Vol.19 No. 1, No. 2, No. 3-4 2007 - Vol.18 No. 1, No. 2, No. 3, No. 4 2006 - Vol.17 No. 1, No. 2-3, No. 4 2005 - Vol.16 No. 1, No. 2, No. 3-4 2004 - Vol.15 No. 1, No. 2, No. 3, No. 4 2003 - Vol.14 No. 1, No. 2, No. 3, No. 4 2002 - Vol.13 No. 1, No. 2, No. 3, No. 4 2001 - Vol.12 No. 1, No. 2, No. 3, No. 4 |