Bright white up-conversion emission from sol-gel derived Yb3+/Er3+/Tm3+: Y2SiO5 nanocrystalline powders

WOS: 000362860900037Bright white up conversion emission has been observed in sol gel derived Yb3+/Er3+/Tm3+: Y2SiO5 nanocrystalline powders when excited with the 950 nm emission of a laser diode. Measurements of the sample emission intensity dependence on the pumping power were performed to explain the up conversion mechanism. The CIE chromaticity coordinates (x, y) for white emission in X-2-Y2SiO5 nanocrystalline form were found to be (0.334, 0.332) under 950 nm laser diode excitation. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.Scientific Research Projects Unit (BAPKO) of Marmara UniversityMarmara University [FEN-E-120613-0266]; TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [114F491]; Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK)This study was financially supported by the Scientific Research Projects Unit (BAPKO) of Marmara University with the Project number FEN-E-120613-0266. This work was also partially supported by TUBITAK with project number 114F491.; One of the authors (Murat Erdem) would like to thank the Scientific and Technological Research Council of Turkey (TUBITAK) for its support