| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 26787 | Journal of Photochemistry and Photobiology A: Chemistry | 2015 | 5 Pages |
•New phosphor powder based on europium doped yttrium titanate.•The powder acts as good phosphor material with an orange red emission.•The phosphor is non-toxic.
New photoluminescent, non-toxic europium doped yttrium titanate phosphors (x mol% Eu3+/Y2Ti2O7 where x = 1.0, 2.0, 4.0 6.0, 10, 15 and 30 mol%) with high crystalline structure were synthesized by sol–gel followed by heat treatment at 1000 °C for 5 h. Eu3+/Y2Ti2O7 phosphors were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), FT-IR and photoluminescence (PL) spectroscopy. The effects of heat treatment and europium metal ion concentration on the structure and PL properties were investigated. Eu3+/Y2Ti2O7 phosphors exhibited micro spherical shape with average crystal size from 90 to 144 nm. The PL spectra showed the orange red emission bands of Eu3+ in highly symmetrical host. The longest PL lifetime was detected at 4 mol% Eu3+/Y2Ti2O7 phosphor. The toxicity of 15 mol% Eu3+:Y2Ti2O7 was tested. The obtained result showed LD50 is 3.2 g/kg. The PL and toxicity properties of the prepared phosphors make them promising materials for the future optical and biological applications.
