On the luminescence of hafnium compounds

Studies of the phosphorescence of polycrystalline hafnia

“…Schipper et al [10] investigated pure, as well as Zr-and Ti-doped HfO 2 . For HfO 2 :Ti they found a PL band peaking near 2.58 eV, and also made a brief note of low-intensity afterglow, without discussing further the latter observation.…”

“…The HfO 2 :Ti phosphor studied by this group was calcined at 1500 1C, and it showed a TL glow curve that is qualitatively similar to the TL glow curves reported here for sintered HfO 2 pellets. It is noted that in the materials studied by these two groups the Ti concentration was 1% [10] or 0.1% [11], while in the Cerac HfO 2 studied here the trace amount of Ti is less than 4 parts-permillion (ppm) [12].…”

“…Several PL investigations of HfO 2 films have been reported recently [6][7][8][9], and short-time PL behavior shows considerable variation depending on the film preparation method, purity, and crystallinity. In contrast to the case of chemically similar ZrO 2 , there have been very few investigations of the phosphorescence in HfO 2 , and those were limited to Ti-doped HfO 2 [10,11]. This paper investigates phosphorescence and thermoluminescence (TL) of nominally pure, commercially available polycrystalline HfO 2 .…”

Synthesis, crystal structure and luminescent properties of titanium(IV)-doped calcium borostannates, CaSn1−xTix(BO3)2

“…The tetravalent titanium ion (Ti 4+ ) is known as a luminescence center showing broad luminescence at 400-500 nm [1], such as in silicates [2], stannates [2][3][4][5][6], zirconates [2,3,7] and hafnates (at 4.2 K) [8]. Quaternary compounds, 6.5MgO·SnO 2 ·1.5B 2 O 3 [9], Mg 5 SnB 2 O 10 [10], Mg 3 ZrB 2 O 8 [10], CaZr(BO 3 ) 2 [11] and BaMSi 3 O 9 (M = Sn, Zr) [12], have also been reported as host materials for the Ti 4+ ion.…”

Nanocrystalline SrHfO3 synthesized through a single step auto-igniting combustion technique and its characterization

“…Hafnium based perovskites doped with Yttrium has been reported as an interesting compound for their applications in fuel cells [5]. Perovskite structured hafnium compounds doped with various dopants were reported as good luminescent materials [6][7][8] and scintillating materials for their potential impact in high energy nuclear medical applications [9]. Recently SrHfO 3 was reported as a potential material for future CMOS technology [10].…”