Sol-gel preparation and photoluminescence property of YBO 3:Eu 3+/Tb 3+ nanocrystalline thin films
Abstract
YBO 3:Eu 3+/Tb 3+ nanocrystalline thin films were successfully deposited onto quartz glass substrates by Pechini sol-gel dip-coating method, using rare-earth nitrates and boric acid as starting materials. The crystal structure, morphology, chemical composition and photoluminescence property of the films were investigated by X-ray diffraction (XRD), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy and fluorescence spectrophotometer. The results of XRD, AFM, XPS and FTIR revealed that the films were composed of spherical YBO 3:Eu 3+/Tb 3+ nanocrystals with average grain size of 80 nm. The YBO 3:Eu 3+ film exhibited strong orange emission at 595 nm and red emission at 615 nm, which were, respectively ascribed to the ( 5D 0→ 7F 1) and ( 5D 0→ 7F 2) transitions of Eu 3+. The YBO 3:Tb 3+ film showed dominant green emission at 545 nm due to the 5D 4- 7F 5 transition of Tb 3+.
- Publication:
-
Applied Surface Science
- Pub Date:
- August 2008
- DOI:
- 10.1016/j.apsusc.2008.03.183
- Bibcode:
- 2008ApSS..254.6362Z