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Structural and Luminescence Properties of Lu2O3:Eu3+ F127 Tri-Block Copolymer Modified Thin Films Prepared by Sol-Gel Method
Instituto Politécnico Nacional, CIITEC IPN, Cerrada de Cecati S/N. Col. Santa Catarina, Azcapotzalco México D.F. C.P. 02250, Mexico
Departamento de Ciencias Naturales, Universidad Autónoma Metropolitana, Unidad Cuajimalpa, DCNI, Pedro Antonio de los Santos 84, México D.F. 11850, Mexico
CINVESTAV Querétaro, Libramiento Norponiente #2000, Fracc. Real de Juriquilla, Querétaro C.P. 76230, Mexico
Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Azcapotzalco, Av. San Pablo No 180, Col. Reynosa-Tamaulipas, México D.F. C.P. 02200, Mexico
* Author to whom correspondence should be addressed.
Received: 4 January 2013; in revised form: 7 February 2013 / Accepted: 16 February 2013 / Published: 26 February 2013
Abstract: Lu2O3:Eu3+ transparent, high density, and optical quality thin films were prepared using the sol-gel dip-coating technique, starting with lutetium and europium nitrates as precursors and followed by hydrolysis in an ethanol-ethylene glycol solution. Acetic acid and acetylacetonate were incorporated in order to adjust pH and as a sol stabilizer. In order to increment the thickness of the films and orient the structure, F127 Pluronic acid was incorporated during the sol formation. Structural, morphological, and optical properties of the films were investigated for different F127/Lu molar ratios (0–5) in order to obtain high optical quality films with enhanced thickness compared with the traditional method. X-ray diffraction (XRD) shows that the films present a highly oriented cubic structure <111> beyond 1073 K for a 3-layer film, on silica glass substrates. The thickness, density, porosity, and refractive index evolution of the films were investigated by means of m-lines microscopy along with the morphology by scanning electron microscope (SEM) and luminescent properties.
Keywords: Lu2O3; luminescence; m-lines; F127; tri-block copolymer
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de Jesus Morales Ramírez, A.; Hernández, M.G.; Murillo, A.G.; de Jesús Carrillo Romo, F.; Palmerin, J.M.; Velazquez, D.Y.M.; Jota, M.L.C. Structural and Luminescence Properties of Lu2O3:Eu3+ F127 Tri-Block Copolymer Modified Thin Films Prepared by Sol-Gel Method. Materials 2013, 6, 713-725.
de Jesus Morales Ramírez A, Hernández MG, Murillo AG, de Jesús Carrillo Romo F, Palmerin JM, Velazquez DYM, Jota MLC. Structural and Luminescence Properties of Lu2O3:Eu3+ F127 Tri-Block Copolymer Modified Thin Films Prepared by Sol-Gel Method. Materials. 2013; 6(3):713-725.
de Jesus Morales Ramírez, Angel; Hernández, Margarita G.; Murillo, Antonieta G.; de Jesús Carrillo Romo, Felipe; Palmerin, Joel M.; Velazquez, Dulce Y.M.; Jota, María L.C. 2013. "Structural and Luminescence Properties of Lu2O3:Eu3+ F127 Tri-Block Copolymer Modified Thin Films Prepared by Sol-Gel Method." Materials 6, no. 3: 713-725.