In this study,the regulation of Al^(3+)/Ga^(3+) on Sr_(2)(Ga,Al)_(2)SiO_(7):Ce^(3+)phosphors is demonstrated to enhance the photoluminescence and persistent luminescence(PersL)performances of Ce^(3+).With the replacem...In this study,the regulation of Al^(3+)/Ga^(3+) on Sr_(2)(Ga,Al)_(2)SiO_(7):Ce^(3+)phosphors is demonstrated to enhance the photoluminescence and persistent luminescence(PersL)performances of Ce^(3+).With the replacement of Al^(3+),the emission band of Ce^(3+) shifts to the longer wavelength side,thermal stability of Ce^(3+) emission becomes better,and Ce^(3+) persistent luminescence shows stronger intensity and longer lifetime.To get insight into the structure-luminescence relationship,the influences of Al^(3+)/Ga^(3+) on the structure of Sr_(2)(Ga,Al)_(2)SiO_(7):Ce^(3+),4f–5d_(i)(i=1–5)transition energies of Ce^(3+) and trap d_(i)stributions are d_(i) scussed.With the construction of the vacuum referred bind_(i)ng energy scheme and analysis of a series of thermoluminescence(TL)spectra,the increase of band gap is found to tune the trap depths and change persistent luminescence performances of Ce^(3+) in Sr_(2)(Ga,Al)_(2)SiO_(7).Finally,with the stimulation of a 1060 nm laser,the optimized Sr_(2)(Ga,Al)_(2)SiO_(7):Ce^(3+) phosphors show strong persistent luminescence of Ce^(3+),suggesting the potential for application in optical storage.展开更多
基金the National Natural Science Foundation of China(Grant No.61905289 and 51902053)Natural Science Foundation of Guangdong Province(Grant No.2019A1515011988)+1 种基金Young Innovative Talents Project of Guangdong Provincial(No.2020KQNCX242)the Innovative Team Program of Guangdong Province(No.2020KCXTD057).
文摘In this study,the regulation of Al^(3+)/Ga^(3+) on Sr_(2)(Ga,Al)_(2)SiO_(7):Ce^(3+)phosphors is demonstrated to enhance the photoluminescence and persistent luminescence(PersL)performances of Ce^(3+).With the replacement of Al^(3+),the emission band of Ce^(3+) shifts to the longer wavelength side,thermal stability of Ce^(3+) emission becomes better,and Ce^(3+) persistent luminescence shows stronger intensity and longer lifetime.To get insight into the structure-luminescence relationship,the influences of Al^(3+)/Ga^(3+) on the structure of Sr_(2)(Ga,Al)_(2)SiO_(7):Ce^(3+),4f–5d_(i)(i=1–5)transition energies of Ce^(3+) and trap d_(i)stributions are d_(i) scussed.With the construction of the vacuum referred bind_(i)ng energy scheme and analysis of a series of thermoluminescence(TL)spectra,the increase of band gap is found to tune the trap depths and change persistent luminescence performances of Ce^(3+) in Sr_(2)(Ga,Al)_(2)SiO_(7).Finally,with the stimulation of a 1060 nm laser,the optimized Sr_(2)(Ga,Al)_(2)SiO_(7):Ce^(3+) phosphors show strong persistent luminescence of Ce^(3+),suggesting the potential for application in optical storage.
