TY - JOUR
T1 - Broadband visible emissions from sol-gel-derived silica/poly(vinyl pyrrolidone) hybrids
AU - Fujihara, Shinobu
AU - Kitta, Seiki
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Scientific Research (No. 15760506) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
PY - 2004/10/21
Y1 - 2004/10/21
N2 - Photoluminescence (PL) of poly(vinyl pyrrolidone) (PVP) and silica/PVP hybrid films was investigated. The transparent PVP film was found to exhibit bluish PL centered at approximately 440 nm in response to ultraviolet (UV) light excitation. This PL behavior was made good use of in preparing luminescent silica/PVP hybrid films with high thermal stability at temperatures up to 250 °C. Europium-doped hybrid films exhibited white PL upon UV excitation, resulting from mixing of broadband PVP emissions and 5D0 → 7F2 emissions of Eu3+. Emission colors could be finely tuned by changing excitation wavelengths.
AB - Photoluminescence (PL) of poly(vinyl pyrrolidone) (PVP) and silica/PVP hybrid films was investigated. The transparent PVP film was found to exhibit bluish PL centered at approximately 440 nm in response to ultraviolet (UV) light excitation. This PL behavior was made good use of in preparing luminescent silica/PVP hybrid films with high thermal stability at temperatures up to 250 °C. Europium-doped hybrid films exhibited white PL upon UV excitation, resulting from mixing of broadband PVP emissions and 5D0 → 7F2 emissions of Eu3+. Emission colors could be finely tuned by changing excitation wavelengths.
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U2 - 10.1016/j.cplett.2004.09.014
DO - 10.1016/j.cplett.2004.09.014
M3 - Article
AN - SCOPUS:7444243782
VL - 397
SP - 479
EP - 483
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 4-6
ER -