VUV spectroscopic properties of Ce3+ and Pr3+-doped AREP2O7-type alkali rare earth diphosphates (A=Na, K, Rb, Cs; RE=Y, Lu)

Luminescence – structure relationships in MYP2O7:Eu3+ (M=K, Rb, Cs)

“…1. In these pyrophosphates, the alkaline cation is encaged, which make MYP 2 O 7 compounds non-hygroscopic, stable at ambient conditions and unaffected by the influence of environments [1]. Potassium ions occupies a 10-fold coordinated site while both Rb þ and Cs þ occupy an 11-fold coordinated site.…”

“…Pyrophosphates M I T III P 2 O 7 , where M I is a monovalent metal ion and T III is a trivalent metal ion have at least eight type of structures [1][2][3][4][5][6][7][8][9]. The factor which determines the type of structure is r M /r T ratio, where r M and r T are the ionic radii of the single and tri-valent cations, respectively.…”

Spectroscopic parameters of Ce3+ ion doped Na2CaMg(PO4)2 phosphor

“…The lifetime was fitted to be 89 ns. Until recently, many phosphates doped by lanthanide ions have been reported to the development of new and efficient VUV-excited PDP phosphors, for example, RE-activated lanthanide phosphates REPO 4 (RE = La, Y, Gd, Tb) [24,37,38], alkaline-earth metal lanthanide phosphates M 3 RE(PO 4 ) 3 (M = Ca, Sr, Ba, RE = La, Y, Gd, Tb) [39], alkaline lanthanide phosphates AREP 2 O 7 (A = Na, K, Rb, Cs; RE = Y, Lu) [40]. Compared with the presently reported VUV phosphors, RE-doped Na 2 CaMg(PO 4 ) 2 phosphors have some advantages such as easy preparation, low preparation cost and high efficiency at the wavelength of the PDP excitation source.…”

Phase equilibria in the ErPO4–KPO3 system

“…A review of the literature shows that double diphosphates in the pure phase form as well as doped with various ions (mainly Ln) have interesting optical and dielectric properties, which indicates the nature of the applications as scintillators or phosphor materials based on A I M III P 2 O 7 -type diphosphates [16][17][18][19][20][21][22][23] or as ionic conductors [2,4,11]. These compounds have diverse crystal structures.…”