Name: Red Phosphors for W-Led Applications (en Inglés)
Price: 35.13 USD
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Author: Editor John Peter
ISBN: 9783668043053

portada Red Phosphors for W-Led Applications (en Inglés)

Red Phosphors for W-Led Applications (en Inglés)

Formato

Libro Físico

Editorial

Grin Verlag

Autor

Editor John Peter

Idioma

Inglés

N° páginas

Encuadernación

Tapa Blanda

ISBN13

9783668043053

Red Phosphors for W-Led Applications (en Inglés)

Editor John Peter (Autor) · Grin Verlag · Tapa Blanda

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Reseña del libro "Red Phosphors for W-Led Applications (en Inglés)"

Project Report from the year 2015 in the subject Physics - Optics, ST Anne's College Of Engineering And Technology (St. Anne's College of Engineering and Technology, Panruti, Tamilnadu, India), language: English, abstract: Trivalent rare-earth-ion-activated molybdate based phosphors have attracted great attention for solid-state lighting applications by virtue of their long lifetimes, and efficient luminescence property. The rare-earth ions are represented by a partly filled 4f shell that is completely shielded by 5s2 and 5p6 orbitals. Therefore, emission transitions provide sharp intense lines in the optical spectra [1, 2]. The use of rare-earth element-based phosphor, based on ''line-type'' f-f transitions, can narrow the emissions to the visible range, resulting in high efficiency and a high-lumen equivalence. In recent years, a flourishing care is concentrated on Li3Ba2Gd3-x(MoO4)8 host matrix for luminescent ions in the interest of their excellent chemical and thermal stability and favourable luminescence characteristics compared to the sulfide- and nitride-based materials. Moreover, these are environmentally friendly as no toxic gases like sulphide are given out. Li3Ba2Gd3-x(MoO4)8 occur in monoclinic crystal system with space group C2/c in a disordered structure [3]. For this research paper, a series of Li3Ba2Gd3-xPrx (MoO4)8 (x = 0.01, 0.03, 0.05, 0.07and 0.09 mol) and Li3Ba2Gd3-xSmx (MoO4)8 (x = 0.02, 0.04, 0.06, 0.08 and 0.10 mol) red phosphors were synthesized by conventional solid state reaction method.