K₂Bi(PO₄)(WO₄) with a layered anionic substructure

Abstract

Key indicatorsSingle-crystal X-ray study T = 293 K Mean (P-O) = 0.006 Å R factor = 0.035 wR factor = 0.094 Data-to-parameter ratio = 20.4For details of how these key indicators were automatically derived from the article, see

Structure and luminescence properties of the novel multifunctional K2Y(WO4)(PO4):Ln3+ (Ln = Tb, Eu, Yb, Er, Tm and Ho) phosphors

“…By taking the values of N=8, X c =0.5, and V=1643.91 Å 3 for KYWP host, the critical transfer distances for center Tb 3+ in KYWP is calculated 35 to be 9.21 Å, which can prove that the refinement result is reasonable at some extend. And it is exactly reasonable that Tb 3+ /Eu 3+ doped KYWP have high quenching concentrations due to the long distance of Y-Y.…”

“…These peaks are quite characteristic of Tm 3+ ions and are assigned to the 1 G 4 -3 H 6 , 2 F 2,3 -3 H 6 , 3 H 4 -3 H 6 transitions, respectively. From the inset, the calculated values of n are 2.82, 1.94 and 1.73 for the 474, 550 and 652 nm emissions, 35 respectively. This implies that it is involved of 3, 2 and 2 photons of 980 nm in producing blue, green and red emissions.…”

“…The quenching concentration of Eu 3+ is as the same as that of Tb 3+ . Thus, the 35 quenching concentrations of KYWP: Tb 3+ /Eu 3+ phosphors under VUV and low-voltage electron-beam excitation are different. We ascribe this to the different mechanisms between CL and VUV excited luminescence.…”

“…3c. The bond lengths of Y-O in YO 8 polyhedra are evaluated to be in the range 35 of 2.191(4)-2.621(4) Å, and the nearest Y-Y distance is 5.501 (7) Å. Fig.…”

“…8,9 For instance, Tb, Eu and Dy, etc. doped 35 phosphors have been widely investigated for PDPs, Hg-free lamps, FEDs and LEDs. Refer to application in PDPs and Hg-free lamps, the plasma resonance vacuum ultraviolet (VUV) radiation lines of Xe atoms at 147 nm and Xe 2 molecules at 172 nm are required to excite phosphors with blue, green, and red tricolor 40 emissions.…”