Luminescence properties of red-emitting praseodymium-activated BaTi4O9 phosphor

Optical and radioluminescence properties of Pr-doped BaTi4O9 crystals synthesized by the floating zone method

“…Under 300-350 and 450-500 nm excitations, Pr-doped crystals showed PL with several sharp peaks around 630 nm. The obtained excitation and emission spectral features were similar to those in previous reports, 34,[47][48][49][50][51] and the origin of the emission was 4f-4f transitions of Pr 3+ ions. Under 300 nm excitation the QYs of 0.1, 0.5, 1.0 and 5.0% Pr-doped crystals were 1.3, 2.8, 5.9 and 4.5%, respectively.…”

“…In particular, it has been reported that 1.0% Pr-doped BaTi 4 O 9 showed strong emission due to 4f-4f transitions of Pr 3+ ions under an excitation wavelength of 328 nm. 34) However, there are no reports on the scintillation properties of Pr-doped BaTi 4 O 9 . For the above reasons, we have synthesized Pr-doped BaTi 4 O 9 crystals with various concentrations of Pr by the floating zone (FZ) method and evaluated the optical and NIR RL properties.…”

Electronic Structures and Pr3+ Photoluminescence Characteristics in Fresnoite, Sr‐Frenoite, and Ge‐Frenoite

“…In the Pr 3+ ‐doped perovskite titanates, the IVCT bands were clearly observed and the shortest Pr 3+ – M n+ distances in these compounds in the range of 3.15–3.3 Å 4 . The IVCT band was also observed in BaTi 4 O 9 :Pr 3+ , and the shortest Pr 3+ – M n+ distances in it is 3.68 Å 7 . These distances are compatible with a significant overlap between the 4 f orbitals of Pr 3+ and the d orbitals of the M n+ , which would strongly favor the Pr– M n+ electron transfer.…”

“…Based on the above-mentioned IVCT model, the PL properties of Pr 31 -doped compounds containing titanium have been increasingly investigated. 3,[7][8] In this study, three compounds with Fresnoite structure, namely, Sr 2 TiSi 2 O 8 , Ba 2 TiSi 2 O 8 , and Ba 2 TiGe 2 O 8 , activated with Pr 31 were investigated. Ba 2 TiSi 2 O 8 , Fresnoite, is a noncentrosymmetric tetragonal crystal, having the space group P4bm.…”

Effects of Ce3+ concentration, beam voltage and current on the cathodoluminescence intensity of SiO2:Pr3+–Ce3+ nanophosphor

“…The main reason for such interest on oxide phosphors is that they have demonstrated high thermal and thermodynamically stability [1]. Recently, red emitting CaTiO 2 , BaTi 4 O 9 and SrTiO 3 activated with Pr 3+ phosphors were investigated for application in FEDs [2,4,5]. In addition, amorphous SiO 2 has been used as a host lattice for trivalent rare earth ions to prepare oxide based phosphors that could be used in low voltage FED technology.…”