TY - JOUR
T1 - Synthesis and fabrication of Y2O3:Tb3+ and Y2O3:Eu3+ thin films for electroluminescent applications
T2 - Optical and structural characteristics
AU - Alarcón-Flores, G.
AU - García-Hipólito, M.
AU - Aguilar-Frutis, M.
AU - Carmona-Téllez, S.
AU - Martinez-Martinez, R.
AU - Campos-Arias, M. P.
AU - Zaleta-Alejandre, E.
AU - Falcony, C.
N1 - Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.
PY - 2015/1/15
Y1 - 2015/1/15
N2 - Terbium, europium and yttrium β diketonates have been synthesized from acetylacetone and inorganic metal salts and used as precursors for the deposition of Tb3+ or Eu3+ doped Y2O3 polycrystalline films by the ultrasonic spray pyrolysis technique. The films were deposited on c-Si substrates at temperatures in the 400-550 °C range. The optical and structural characterization of these films as a function of substrate temperature and Tb3+ and Eu3+ concentration was carried out by means of photoluminescence (PL), cathodoluminescence (CL), infrared (IR), ellipsometry, and UV-visible spectroscopy and atomic force microscopy (AFM), energy dispersive spectroscopy (EDS) and X ray diffraction (XRD) measurements respectively. The PL intensity from these films was found to depend on deposition temperature. Films deposited above 450 °C exhibited the characteristic PL peaks associated with either Tb3+ or Eu3+ intra electronic energy levels transitions. The most intense PL emission was found for dopant concentration of 10 at% for Tb3+ and at 8 at% for Eu3+ ions into precursor solution. In both cases concentration quenching of the PL emission was observed for concentrations above these values. The films had a refractive index (1.81), low average surface roughness (∼62 Å) and a UV-Vis. transmission of the order of 90 %T.
AB - Terbium, europium and yttrium β diketonates have been synthesized from acetylacetone and inorganic metal salts and used as precursors for the deposition of Tb3+ or Eu3+ doped Y2O3 polycrystalline films by the ultrasonic spray pyrolysis technique. The films were deposited on c-Si substrates at temperatures in the 400-550 °C range. The optical and structural characterization of these films as a function of substrate temperature and Tb3+ and Eu3+ concentration was carried out by means of photoluminescence (PL), cathodoluminescence (CL), infrared (IR), ellipsometry, and UV-visible spectroscopy and atomic force microscopy (AFM), energy dispersive spectroscopy (EDS) and X ray diffraction (XRD) measurements respectively. The PL intensity from these films was found to depend on deposition temperature. Films deposited above 450 °C exhibited the characteristic PL peaks associated with either Tb3+ or Eu3+ intra electronic energy levels transitions. The most intense PL emission was found for dopant concentration of 10 at% for Tb3+ and at 8 at% for Eu3+ ions into precursor solution. In both cases concentration quenching of the PL emission was observed for concentrations above these values. The films had a refractive index (1.81), low average surface roughness (∼62 Å) and a UV-Vis. transmission of the order of 90 %T.
KW - Cathodoluminescence
KW - Photoluminescence
KW - Polycrystalline films
KW - Spray pyrolysis
UR - http://www.scopus.com/inward/record.url?scp=84922535381&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2014.09.020
DO - 10.1016/j.matchemphys.2014.09.020
M3 - Artículo
SN - 0254-0584
VL - 149
SP - 34
EP - 42
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
ER -