Blue luminescence in yttrium and gadolinium niobates caused by bismuth. The importance of non‐bonding ns2 valence orbital electrons

Electronic Structures and Luminescence Properties of YNbO4 and YNbO4:Bi

“…The Y site, before the Bi ion is substituted, has 12 cations within 4 A > : upper cations, Y [9,10], Nb [5,6]; middle cations, Nb [1,2,3,4]; and lower cations, Y [11,12] and Nb [7,8] (see Fig. 7).…”

“…The nonsul"de blue phosphors need to be developed for FED applications. Recently YNbO :Bi has received attention as a potential blue phosphor for FED (2,3). YNbO :Bi showed reasonable cathodoluminescence at low voltage.…”

Enhanced luminescence of gadolinium niobates by Bi3+ doping for field emission displays

“…Recently, YNbO 4 : Bi 3+ has received much attention as a potential blue phosphor for FEDs [4,5]. As far as we know, less information is available concerning the luminescent properties of GdNbO 4 based phosphors [4,6]. In this paper, more detailed research has been conducted on GdNbO 4 activated by Bi 3+ , which is potentially applied as a blue component in FEDs.…”

“…Surprisingly enough, GdNbO 4 shows only a very weak luminescence. Recently, YNbO 4 : Bi 3+ has received much attention as a potential blue phosphor for FEDs [4,5]. As far as we know, less information is available concerning the luminescent properties of GdNbO 4 based phosphors [4,6].…”

Hybrid precursors synthesis and optical properties of LnNbO4:Bi3+ blue phosphors and Bi3+ sensitizing of on Dy3+'s luminescence in YNbO4 matrix

“…However, it was found that the sulfide phosphors like ZnS:Ag have disadvantages for FED application due to degradation for low-voltage cathodeluminescence [5][6][7], which motivate many scientists to search new nonsulfide blue phosphors. Recently, Bi 3+ doped with LaInO 3 and YNbO 4 have been shown to be potential and efficient blue phosphors for FED [8,9]. It was well-known that the Bi 3+ can be used as not only an activator but also a sensitizer of luminescence.…”