E. Bayer et al., TIME-RESOLVED SPECTROSCOPY AND ENERGY-TRANSFER IN PR3-DOPED GD-2(SO4)(3)CENTER-DOT-8H(2)O(), Applied physics A: Materials science & processing, 61(2), 1995, pp. 177-181
The luminescence of Pr3+ in gadolinium sulfate hydrate is reported for
195 nm laser excitation. The Pr3+ ion acts as a sensitizer of the hos
t lattice emission. The pr(3+) --> Gd3+ energy transfer occurs in two
different ways. In the octahydrate the transfer occurs from the lowest
component of the 4f5d configuration of Pr3+, but in the samples with
less water there is energy transfer from the S-1(0) level of Pr3+ to s
everal Gd3+ levels. The Pr3+ emission in the two modifications is, of
course, also strikingly different.