TY - JOUR
T1 - Factors for determining photoluminescence properties of YBO 3:Ce3+ phosphor prepared by hydrothermal method
AU - Ogata, Hiroko
AU - Takeshita, Satoru
AU - Isobe, Tetsuhiko
AU - Sawayama, Tomohiro
AU - Niikura, Seiji
N1 - Funding Information:
S.T. thanks the Japan Society for the Promotion of Science (JSPS) for the post-doctoral fellowship (PD).
PY - 2011/9
Y1 - 2011/9
N2 - YBO3:Ce3+ blue-emitting phosphors were prepared from boric acid and nitrates of yttrium and cerium(III) by hydrothermal method. An excess amount of boric acid, prolonged aging, high temperature, and a high pH value promote the formation of crystalline YBO3. The higher crystallinity results in the higher photoluminescence (PL) intensity corresponding to the 5d-4f transition of Ce3+ under the irradiation of near-UV light. The PL intensity also depends on the pH value of precursor suspension and the nominal Ce3+ concentration, where the sample prepared at pH = 8 and Ce/(Y + Ce) = 0.25-0.5 at% shows the maximum PL intensity. In addition, the hydrothermally prepared sample shows the characteristic photobleaching behavior under the continuous irradiation of near-UV light. These results suggest that the crystallinity of the host YBO 3 crystal and the homogeneity of substituted Ce3+ ions play significant roles in the PL properties.
AB - YBO3:Ce3+ blue-emitting phosphors were prepared from boric acid and nitrates of yttrium and cerium(III) by hydrothermal method. An excess amount of boric acid, prolonged aging, high temperature, and a high pH value promote the formation of crystalline YBO3. The higher crystallinity results in the higher photoluminescence (PL) intensity corresponding to the 5d-4f transition of Ce3+ under the irradiation of near-UV light. The PL intensity also depends on the pH value of precursor suspension and the nominal Ce3+ concentration, where the sample prepared at pH = 8 and Ce/(Y + Ce) = 0.25-0.5 at% shows the maximum PL intensity. In addition, the hydrothermally prepared sample shows the characteristic photobleaching behavior under the continuous irradiation of near-UV light. These results suggest that the crystallinity of the host YBO 3 crystal and the homogeneity of substituted Ce3+ ions play significant roles in the PL properties.
KW - Hydrothermal synthesis
KW - Photobleaching behavior
KW - Photoluminescence
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U2 - 10.1016/j.optmat.2011.07.003
DO - 10.1016/j.optmat.2011.07.003
M3 - Article
AN - SCOPUS:80052023692
SN - 0925-3467
VL - 33
SP - 1820
EP - 1824
JO - Optical Materials
JF - Optical Materials
IS - 11
ER -