Luminescent Properties of Surface Functionalized BaTiO3 Embedded in Poly(methyl methacrylate)

Materials

Sebastian Requena¹  Srijan Lacoul² 

[1] Department of Physics and Astronomy, Texas Christian University, TCU Box 298840, Fort Worth, TX 76129, USA;

关键词: BaTiO₃;    BTO;    polymethyl methacrylate;    PMMA;    photoluminescence;    inorganic-organic nanocomposite;   

DOI  :  10.3390/ma7010471

来源: mdpi

【 摘 要 】

As-received BaTiO₃ nanopowders of average grain sizes 50 nm and 100 nm were functionalized by (3-aminopropyl)triethoxysilane (APTES) and mixed with poly(methyl methacrylate)/toluene solution. The nanocomposite solution was spin coated on Si substrates to form thin films. The photoluminescence spectrum of the pure powder was composed of a bandgap emission at 3.0 eV and multiple bands centered about 2.5 eV. Surface functionalization of the BaTiO₃ powder via APTES increases overall luminescence at room temperature while only enhancing bandgap emission at low-temperature. Polymer coating of the functionalized nanoparticles significantly enhances bandgap emissions while decreasing emissions associated with near-surface lattice distortions at 2.5 eV.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland