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

Materials

卷:7

Srijan Lacoul¹  Sebastian Requena¹  Yuri M. Strzhemechny¹ 

[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: DOAJ

【 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】

Unknown