Lu C.-H.Wu T.-Y.Hsu C.-H.2019-05-132019-05-13201000222313https://scholars.lib.ntu.edu.tw/handle/123456789/407427Blue-light emitting Sr2CeO4 phosphors were successfully prepared via a microwave-assisted solvothermal method employing ethylene glycol as a solvent. The formation of Sr2CeO4 phase began when the solvothermally derived precursors were heated at 800 ¢XC. With increase in heating temperatures, significantly enhanced excitation and emission intensities were observed because of an increase in the amount of Sr2CeO4. Heating at 1200 ¢XC led to a substantial decrease in mission intensity due to thermal decomposition of Sr2CeO4 at elevated temperatures. The solvothermally derived Sr2CeO4 was found to exhibit higher emission intensity than the solid-state-reaction-derived phosphors. According to the deconvoluted emission spectra, two emission peaks are attributed to two metal-to-ligand charge-transfer states. Based on the deconvoluted results, a qualitative energy-level diagram of Sr2CeO4 was proposed. VUV-excited luminescence studies for Sr2CeO4 indicate that one peak at 193 nm is assigned to the charge-transfer transition between Sr2+ and O2-. ? 2010.MicrowavePhosphorsSolvothermal synthesisSr2CeO4journal article10.1016/j.jlumin.2009.09.0172-s2.0-76449089306https://www.scopus.com/inward/record.uri?eid=2-s2.0-76449089306&doi=10.1016%2fj.jlumin.2009.09.017&partnerID=40&md5=67ea858418ac37d8a8e3cfba5861582f