Ba3Ga2S6, Ba4Ga2S7, and Ba5(GaS4)2. When substituted for the alkaline earth, Eu2+ shows an emission in most host lattices. The emission band shifts to longer wavelengths with increasing MGa atomic ratio of the host lattice. For most thiogallates, despite low phonon energies and small Stokes shifts, quenching of the Eu2+ emission starts below 300 K. Reasons for such behaviors are discussed.
所述的固态调查中号SGa 2小号3系统(中号=
锶,
钡)给出以下的
硫代
镓酸盐存在的证据:体SrGa 2小号4,SR 2嘎2小号5,巴加4小号7,巴加2小号4,Ba 2 Ga 2 S 5,Ba 3 Ga 2 S 6,Ba 4 Ga 2 S 7和Ba 5(GaS 4)2。当取代碱土时,Eu 2+在大多数主体晶格中均显示出发射。随着主晶格的MGa原子比增加,发射带移至更长的波长。对于大多数
硫代
没食子酸盐,尽管声子能量较低且斯托克斯位移较小,但Eu 2+发射的猝灭在300 K以下开始。讨论了这种行为的原因。