TY - JOUR
T1 - Structural and luminescent properties of europium doped TiO2 thick films synthesized by the ultrasonic spray pyrolysis technique
AU - Zaleta-Alejandre, E.
AU - Zapata-Torres, M.
AU - García-Hipólito, M.
AU - Aguilar-Frutis, M.
AU - Alarcón-Flores, G.
AU - Guzmán-Mendoza, J.
AU - Falcony, C.
PY - 2009/5/7
Y1 - 2009/5/7
N2 - The structural and luminescent properties of trivalent europium-doped titanium dioxide films synthesized by the ultrasonic spray pyrolysis technique at several substrate temperatures are reported. These films are nanocrystalline and present a mixture of tetragonal (anatase and rutile) crystal structures of the titania as determined by x-ray diffraction. The rutile crystal structure became predominant as the substrate temperature during deposition was increased. Under UV and electron beam excitation, these coatings showed strong luminescence due to f-f transitions and the dominant transition was the hypersensitive 5D0 → 7F2 red emission of Eu3+. The photo- and cathodoluminescence characteristics of these films were studied as a function of growth parameters such as substrate temperature and europium concentration. Excitation with a wavelength of 396 nm resulted in photoluminescent emission peaks located at 557, 580, 592, 615, 652 and 703 nm, associated with the electronic transitions of the Eu3+ ion. The photoluminescence (PL) intensity as a whole is observed to decrease as the deposition temperature is increased. Also, with increasing doping concentration, a quenching of the PL is observed. The chemical composition and surface morphology characteristics of the films are also reported.
AB - The structural and luminescent properties of trivalent europium-doped titanium dioxide films synthesized by the ultrasonic spray pyrolysis technique at several substrate temperatures are reported. These films are nanocrystalline and present a mixture of tetragonal (anatase and rutile) crystal structures of the titania as determined by x-ray diffraction. The rutile crystal structure became predominant as the substrate temperature during deposition was increased. Under UV and electron beam excitation, these coatings showed strong luminescence due to f-f transitions and the dominant transition was the hypersensitive 5D0 → 7F2 red emission of Eu3+. The photo- and cathodoluminescence characteristics of these films were studied as a function of growth parameters such as substrate temperature and europium concentration. Excitation with a wavelength of 396 nm resulted in photoluminescent emission peaks located at 557, 580, 592, 615, 652 and 703 nm, associated with the electronic transitions of the Eu3+ ion. The photoluminescence (PL) intensity as a whole is observed to decrease as the deposition temperature is increased. Also, with increasing doping concentration, a quenching of the PL is observed. The chemical composition and surface morphology characteristics of the films are also reported.
UR - http://www.scopus.com/inward/record.url?scp=65449126747&partnerID=8YFLogxK
U2 - 10.1088/0022-3727/42/9/095102
DO - 10.1088/0022-3727/42/9/095102
M3 - Artículo
SN - 0022-3727
VL - 42
JO - Journal of Physics D: Applied Physics
JF - Journal of Physics D: Applied Physics
IS - 9
M1 - 095102
ER -