X-ray powder structure of Sr2CeO4: a new luminescent material discovered by combinatorial chemistry

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

“…4 shows the emission spectra of YNbO 4 and LnNbO 4 :Bi 3+ excited with 300 nm, which presents the maximum band around 417 and 440 nm, respectively. When the incorporation of Bi 3+ into the LnNbO 4 , it is obviously that the emission peak position was shift to the longer wavelength region, which indicates that the luminescence of NbO 4 3− mainly affected by the Bi 3+ . It was well-known that the emission band of pure LnNbO 4 was ascribed to the charge transfer transition from the O to the empty orbit 4d of Nb and the Bi 6p is lower energy than that of Nb 4d.…”

“…It was well-known that the emission band of pure LnNbO 4 was ascribed to the charge transfer transition from the O to the empty orbit 4d of Nb and the Bi 6p is lower energy than that of Nb 4d. Therefore, as for selfactivated host, NbO 4 3− firstly excited by the excitation source, and then the charge was transferred to the activator Bi 3+ . This is the reason why the peak position of emission band was shift to the long wavelength and the emission intensity of LnNbO 4 :Bi 3+ is obviously weaker than that of pure LnNbO 4 .…”

“…In the past decade, the main work focused on phosphor zinc sulfide silver (ZnS:Ag), because it is one of the most efficient blue phosphors which were broadly used in the lowvoltage application, such as field emission displays [2]. Besides this, Sr 2 CeO 4 is also a promising blue phosphor which was firstly introduced by Danielson et al [3,4]. 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.…”

“…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.…”

Challenges and prospects of anodes for solid oxide fuel cells (SOFCs)

“…Danielson et al in 1998 showed that Sr 2 CeO 4 exhibit a Ce 3+ /Ce 4+ redox couple when it is excited by UV light at ambient condition [82,83]. Such valence couple could facilitate the HOR and hydrocarbons on the anodic side.…”