稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2014年
10期
927-932
,共6页
yttrium aluminium borate%cerium%monovalent codopants%ionic radii%thermogravimetric analysis%rare earths
The cerium (Ce3+) doped yttrium aluminium borate (YAB) phosphor was synthesized by modified solid state reaction. The phosphor’s phase purity and its emission properties were studied using powder X-ray diffraction pattern and photoluminescence spec-troscopy. The synthesized YAB had rhomobohedral crystal structure. The phosphor had two different excitation and emission spectra. By 325 nm excitation, the phosphor had emission at 373 nm and with 363 nm excitation;the phosphor gave violet-blue emission at 418 nm. The UV emission of the phosphor originated due to Ce3+ions at the yttrium site and violet-blue emission owing to Ce3+ions at non-regular sites viz., Al3+and interstitial sites. The emission intensity of the phosphor was enhanced when monovalent ions (K+, Na+, and F-) were added as co-dopants. The crucial role of ionic radii of monovalent co-dopants on the emission enhancement of the YAB:Ce3+phosphor was reported. Thermogravimetric study showed that the YAB possessed high thermal stability at up to 900 °C.
