Time-resolved spectroscopy and energy transfer in Pr3+-doped Gd2(SO4)3�8H2O

Spectroscopic investigation and simulation of the crystal field effect as well as paramagnetic behavior of K2La1−xPrxCl5 ternary chlorides

“…The low rms deviation of 17 cm À1 achieved with the simulation with C 2v point symmetry instead of the real C s one, is rather surprising and indicates, in contrast to the structural data, a higher pseudosymmetry than the actual C s symmetry. The low B 2 2 value would suggest even higher symmetry but this is con-tradicted by the rather important values of the other (B 4 2 , B 6 2 , and B 6 6 ) parameter values which describe a similar symmetry decrease ( Table 2). Of course, the monocapped trigonal prismatic coordination around the Pr 3+ ion prevents any pseudosymmetry higher than C 2v .…”

“…In addition to the sharp line emission due to the intraconfigurational 4f-4f transitions, the emission of trivalent praseodymium occurs as wide bands in the near UV region, if the lowest 5d state is located below the 4f N ( 1 S 0 ) state due to the strong coupling between the 5d electron and the lattice phonons. If the location of the 5d states is at higher energy than the 1 S 0 state photon cascade emission can be observed [5,6]. Thus it is interesting to investigate the luminescence of Pr 3+ ions in different host lattices.…”

Thermal population of the4f15d1state inVink1, Dorenbos2, Eijk3 2002Phys. Rev. B221140View full textAdd to dashboardCite

“…The quantum cutting process, i.e., gaining two emitted photons from one absorbed photon, is interesting for phosphors applied in lighting or plasma display panels. Quantum cutting was discovered in 1974 for YF 3 :Pr 3ϩ1,2 and has been reported for several fluoride, 1-5 aluminate, 6,7 borate 8,9 and sulfate [10][11][12] hosts.…”

Photon cascade emission in SrAlF5:Pr3

“…Wegh et al showed quantum cutting in LiGdF 4 doped with Eu 3+ [3], and with both Er 3+ and Tb 3+ [4]. The Pr 3+ ion shows quantum cutting in a large number of hosts, such as fluorides [5][6][7][8][9] and oxides [10][11][12][13][14][15][16]. However, not all hosts show quantum cutting (when doped with Pr 3+ ).…”