A series of Lu2O3 nanopowders co-doped with Yb3+ and Ho3+ were synthesized by co-precipitation method. The Yb3+ concentration is 1mol% and the Ho3+ concentration ranges from 0.5mol% to 10mol%. The Stokes and Anti-Stokes spectroscopic
properties of the prepared nanopowders were investigated, together with the relative intensities of Stokes and Anti-Stokes PL spectra dependence on the powders calcined at different temperatures. Strong green emissions were observed under the excitation of 447.5nm (Xenon Lamp) and 980nm (Laser Diode), respectively. Concentration quenching occurrs with the increase of Ho3+ concentration. Power studies reveal that a two-photon process is involved in the Anti-Stokes emissions and the possible upconversion mechanisms are energy transfer from Yb3+ to Ho3+. Concentration quenching and energy transfer process are confirmed by the decay time of the 5F4, 5S2 level under the excitation of different pump wavelength.
AN Li-Qiong
,
ZHANG Jian
,
LIU Min
,
WANG Shi-Wei
. Spectroscopic Study of Lu2O3:Yb3+, Ho3+ Nanopowders[J]. Journal of Inorganic Materials, 2008
, 23(2)
: 383
-386
.
DOI: 10.3724/SP.J.1077.2008.00383
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