Luminescence properties of Y2O3:Bi3+, Ln3+ (Ln=Sm, Eu, Dy, Er, Ho) and the sensitization of Ln3+ by Bi3+

X-ray photoelectron spectroscopy and luminescent properties of Y2O3:Bi3+ phosphor

“…Our results are in agreement with the investigation done by Ju et al [10,12] who reported that the Y 2 O 3 :Bi material's emission consisted of three broad bands centered at 3.44, 3.02 and 2.5 eV under the excitation range of 3.88-3.54 eV. This was attributed to the emission of the Bi ion in the S 6 and C 2 sites.…”

“…7b was acquired. The emission spectrum also shows broad peaks in the blue and green regions which corresponds well with our results from PL and with results from literature [10,12]. Peak deconvolution showed three Gaussian peaks centered at 2.6, 3.0 and 3.4 eV.…”

“…Boulon [14] observed two emission bands for the Y 2 O 3 :Bi 3+ phosphor, namely a weak emission band at ∼3 eV which is ascribed to Bi 3+ in the S 6 site and a stronger band at ∼2.5 eV attributed to Bi 3+ in the C 2 site. According to Ju et al [10,12], there are three emission bands centered at ∼3.4, 3 and 2.5 eV which were assigned to the blue and green emissions for the Bi 3+ ions occupied the S 6 and C 2 sites. Two luminescence emission bands have been reported in the literature for the emission of Y 2 O 3 :Bi 3+ at ∼3 and 2.4 eV, which were attributed to the emission center (Bi 3+ ) in the two cation sites (S 6 and C 2 ) [7,9,11,14].…”

“…Furthermore, it is well known that the level 3 P 1 may split into sublevels due to the crystal field effect, corresponding to the position of the Bi 3+ ion in the host. The 3 P 1 level considered in this work split to two ( 3 A u and 3 E u ) and three ( 3 A, 3 B and 3 B) sublevels in the S 6 and C 2 symmetry sites, respectively [8,12].…”

White light emitting from YVO4/Y2O3:Eu3+,Bi3+ composite phosphors for UV light-emitting diodes

“…However, it was only excited by short-wave UV light (210-250 nm). For extending the excitation wavelength to long-wave UV range, Ju [13] synthesized a Y 2 O 3 :Eu 3 þ ,Bi 3þ phosphor which emitted a strong broad blue band centered at 410 nm and a weak sharp red peak at 611 nm caused by energy transfer from Bi 3þ to Eu 3 þ under the excitation of 370 nm (the characteristic excitation peak of Bi 3 þ ion). Chen et al [14,15] prepared a Y 2 O 3 :Eu 3þ inorganic-organic hybrid nanoparticles with 2-thenoyltrifluoroacetone in which the excitation band red-shifted from 300 to 400 nm to match the emission of the commercial UV-LEDs.…”