6533b86efe1ef96bd12cc900

RESEARCH PRODUCT

Multicolor upconversion luminescence of GdVO4:Ln3+/Yb3+ (Ln3+ = Ho3+, Er3+, Tm3+, Ho3+/Er3+/Tm3+) nanorods

Dragana JovanovicMiroslav D. DramićaninKrisjanis SmitsTamara V. Gavrilović

subject

LanthanideMaterials scienceDopantWhite lightAnnealing (metallurgy)Process Chemistry and TechnologyGeneral Chemical EngineeringMulticolor emissionAnalytical chemistry02 engineering and technologyPhoshpors010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesPhoton upconversion0104 chemical sciencesIonLanthanidesNanorodVanadatesChromaticity0210 nano-technologyExcitationUpconversion

description

Lanthanide-doped GdVO4 nanorods that exhibit upconversion emission under 982 nm excitation have been prepared by a facile room-temperature chemical co-precipitation method followed by a subsequent annealing at temperatures of 600 degrees C, 800 degrees C and 1000 degrees C. Multicolor upconversion emission, including white, was achieved by tuning the concentrations of dopant lanthanide ions (Ho3+, Er3+, Tm3+ and Yb3+) in GdVO4. It is found that four GdVO4 samples emit light with the white chromaticity coordinates of (0.326, 0.339), (0.346, 0.343), (0.323, 0327) and (0.342, 0.340) respectively, under a single-wavelength NIR excitation. These coordinates are very close to the standard equal energy white light coordinates (0333, 0.333) according to the 1931 CIE diagram. By varying dopant lanthanide concentrations in nanorods it is possible to produce upconversion emission with colors between red (0.504, 0369), green (0.282, 0.577) and blue (0.142, 0.125) coordinates. (C) 2015 Elsevier Ltd. All rights reserved.

yearjournalcountryeditionlanguage
2016-03-01Dyes and Pigments
https://doi.org/10.1016/j.dyepig.2015.11.005