Influence of the Ce:YAG Amount on Structure and Optical Properties of Ce:YAG-PMMA Composites for White LED
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Francesco Armetta
Abstract
Ce:YAG-poly(methyl methacrylate) (PMMA) composites were prepared by using a melt compounding method, adding several amounts of Ce:YAG in the range 0.1–5 wt. %. The optical properties of the obtained composites and of the composites combined with a blue LED were measured to investigate the effect of the amount of Ce:YAG on the resulting emitted light in view of possible application in white LED manufacture. An increase in Ce:YAG amount caused an increase in the emission and a shift of 15 nm, influencing the white LED performance. The structure and morphology of the composites were studied. The results show that the interaction between the two components, observed by using solid state NMR experiments, are the responsible for the observed shift.
Acknowledgement
The authors acknowledge the University of Palermo, FFR 2012–2013 –ATE 0594 “Development of new methodologies for the synthesis and functionalization of nanoparticles with luminescence properties for advanced applications” and CORI2013 (Bando per la concessione di contributi per l'avvio e lo sviluppo di collaborazioni dell'Ateneo 2013 – Azione D – prot. 32827 del 2/5/2013). NMR and TEM experimental data were provided by Centro Grandi Apparecchiature – UniNetLab – Università di Palermo funded by P.O.R. Sicilia 2000–2006, Misura 3.15 Azione C Quota Regionale. Student support was provided by the National Research Foundation in South Africa. Thanks to Dr. Camillo Sartorio for the registration of the excitation and of the emission spectra.
©2016 Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- Frontmatter
- Editorial
- The First European Conference on Physical and Theoretical Chemistry
- Inverse Calibration Free fs-LIBS of Copper-Based Alloys
- Influence of the Ce:YAG Amount on Structure and Optical Properties of Ce:YAG-PMMA Composites for White LED
- Morphological Characterization of Shape-Controlled TiO2 Anatase through XRPD Analysis
- Optical and Geometric Properties of Free Silica Nanoparticles Studied by Small-Angle X-Ray Scattering
- Olive Mill Wastewater (OMW) Phenol Compounds Degradation by Means of a Visible Light Activated Titanium Dioxide-Based Photocatalyst
- The Electrochemical Degradation of Poly(3,4-ethylenedioxythiophene) Films Electrodeposited from Aqueous Solutions
- Repassivation Investigations on Aluminium: Physical Chemistry of the Passive State
- Excitation-Energy Transfer Paths from Tryptophans to Coordinated Copper Ions in Engineered Azurins: a Source of Observables for Monitoring Protein Structural Changes
- Are Two Better Than One? A New Approach for Multidentate Grafting of Peptides to a Gold Substrate
- Peptide Hydration Phenomena through a Combined Quantum Chemical and Bottom-Up Approach
- Relative Stability of the Scleroglucan Triple-Helix and Single Strand: an Insight from Computational and Experimental Techniques
- Revised Atomistic Models of the Crystal Structure of C–S–H with high C/S Ratio
- Assessing Accuracy of Exchange-Correlation Functionals for the Description of Atomic Excited States
- Photodegradation of Organic Pollutants on TiO2 P25 Surfaces Investigated by Transmission FTIR Spectroscopy Under In Situ UV-Vis Irradiation
