Ce:Y3Al5O12−Poly(methyl methacrylate) Composite for White-Light-Emitting Diodes
- Autori: Saladino, ML; Chillura Martino, DF; Floriano, M; Hreniak, D; Marciniak, L; Strek, W; Caponetti, E
- Anno di pubblicazione: 2014
- Tipologia: Articolo in rivista (Articolo in rivista)
- OA Link: http://hdl.handle.net/10447/96908
Abstract
A Ce:YAG-poly(methyl methacrylate) (PMMA) composite was prepared by using the melt compounding method. The Structure and morphology were investigated by X-ray diffractometry, transmission electron microscopy, and small-angle X-ray scattering. The optical properties (emission, excitation, and fluorescence decay rate) of the composite were studied by using photoluminescence spectroscopy. The polymer−filler interactions were studied using 13C cross-polarization magic-angle spinning NMR spectroscopy (13C{1H} CP-MAS NMR). The results indicated that Ce:YAG particles are well-dispersed in the PMMA matrix without loss of their luminescence properties or significant spectral shift, thus suggesting that this composite can be valuable for advanced applications in white LED manufacture. A demonstration of its efficiency in white LED devices is also reported.