Photoluminescence Properties Influenced by Calcining Condition and Doping Concentration of Nano-sized ZnGa2O4: Cr3+
Chromium-activated ZnGa2O4 nano-sized phosphor powder was prepared by the Sol-Gel technique using citric acid as chelator, and the microstructure and luminescent property were studied. The host ZnGa2O4 belongs to the spinel structure and the ZnGa2O4:Cr3+ phosphor powder exhibited bright red emission band. The excitation bands with peak of maximum height at about 250 nm, 410 nm and 560 nm were related to the charge transfer (CT) of Ga-O, 4A2-4T1 and 4A2-4T2 transitions of Cr3+, respectively. Different quenching concentrations of the CT state and intrinsic excitation were discovered originating from different energy transfer schemes. Meanwhile, with the increasing of the calcining temperature the PLE spectrum exhibited an obvious blue-shift which is attributed to the enhancement of the crystal field.
Luminescence Nano-sized Zinc Gallate Calcining Temperature Quenching Concentration
Weiwei ZHANG Junying ZHANG Hui WAN Ziyu CHEN Tianmin WANG
School of Science, Beihang University, Beijing, China 100191
国际会议
重庆
英文
616-620
2008-06-09（万方平台首次上网日期，不代表论文的发表时间）