Halappa, Pramod and Shivakumara, C (2017) Synthesis and characterization of luminescent La2Zr2O7/Sm3+ polymer nanocomposites. [Book Chapter]
Full text not available from this repository. (Request a copy)Abstract
Luminescence is one of the most important properties of nanoparticles. Applications are found largely in medical, biological or pharmaceutical areas. In general, luminescence is a property of aromatic organic moieties or single isolated semiconducting nanoparticles. Most of the earlier materials are toxic and carcinogenic and show limited thermodynamic stability against oxidation. These severe disadvantages make application difficult. Therefore, the search for nontoxic luminescent oxide nanoparticles or other rare earth doped oxides is underway. Looking at potential applications, there is a strong need for nontoxic oxide luminescent nanocomposites that are stable in ambient conditions. Luminescence of rare earth oxide nanoparticles is subject to rapid aging caused by formation of hydroxides at the surface of oxide nanoparticles, quenching luminescence. Coating the surface of the particles with a polymer protects the surface of the oxide nanoparticles against ambient air, and even water, thereby avoiding or at least reducing this problem. Additionally, polymer-coated oxide nanoparticles can be suspended in water, especially in biological applications. In this chapter, high surface area La2Zr2O7:Sm3+ phosphors were prepared by the nitrate - citrate gel combustion method and polymer composites were made by sonication methods. These compounds were characterized using powder X-ray diffraction, UV-visible spectroscopy, thermogravimetric analysis and photoluminescence technique. Both CIE chromaticity diagram and CCT values confirmed that these phosphors can be useful in the fabrication of red component in white light-emitting diodes (WLEDs) for displays and other optical device applications.
| Item Type: | Book Chapter |
|---|---|
| Publisher: | Scrivener Publishing LLC - Wiley |
| Additional Information: | The Copyright belongs to the Scrivener Publishing LLC |
| Keywords: | CIE chromaticity; Phosphor; Photoluminescence; Polymer nanocomposites; Samarium; Display devices; Nanocomposites; Nanoparticles; Phosphors; Photoluminescence; Polymers; Rare earths; Samarium; Thermogravimetric analysis; Toxic materials; Ultraviolet visible spectroscopy; CIE chromaticity; Cie chromaticity diagrams; Polymer nanocomposite; Powder X ray diffraction; Rare-earth oxide nanoparticles; Semi-conducting nanoparticles; Synthesis and characterizations; White lightemitting diodes (WLEDs); Plastic coatings |
| Department/Centre: | Division of Chemical Sciences > Solid State & Structural Chemistry Unit |
| Date Deposited: | 26 May 2022 04:27 |
| Last Modified: | 26 May 2022 04:27 |
| URI: | https://eprints.iisc.ac.in/id/eprint/72546 |
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