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Rare-Earth-Activated Phosphors

2022-06-29 Science
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Release : 2022-06-29
Genre : Science
Kind : eBook
Book Rating : 051/5 ( reviews)

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Book Synopsis Rare-Earth-Activated Phosphors by : Vikas Dubey

Download or read book Rare-Earth-Activated Phosphors written by Vikas Dubey. This book was released on 2022-06-29. Available in PDF, EPUB and Kindle. Book excerpt: Rare-Earth-Activated Phosphors: Chemistry and Applications outlines important fundamentals and properties and explores successful application that address key problems across the sciences. Sections introduce phosphors and luminescence, explore their properties, characteristics, synthesis and degradation and highlight key applications across telecommunications, lighting, electroluminescent devices, (bio-)analytical sensors, bio-imaging set-ups, drug delivery and sustainable energy devices. Drawing on the knowledge of an expert team of contributors, the book provides useful insight into successfully harnessing the properties of rare earth activated phosphors for a range of important applications. Rare-earth nano-phosphors offer an interesting array of characteristics, including sharp emission bands, exceptional optical damage thresholds, low toxicity, high selectivity and stability, and long luminescence lifetimes. Understanding these properties can help researchers effectively manipulate them for a range of important applications. Provides a good introduction to the useful properties and characteristics of rare earth activated phosphors Analyzes the use of rare earth activated phosphors for a broad variety of important applications, bridging the gap between theory and application Encourages further discourse and development for improving the energy-efficiency of devices based on rare earth activated phosphors

Luminescence

2021-12-20 Science
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Release : 2021-12-20
Genre : Science
Kind : eBook
Book Rating : 451/5 ( reviews)

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Book Synopsis Luminescence by : Ratnesh Tiwari

Download or read book Luminescence written by Ratnesh Tiwari. This book was released on 2021-12-20. Available in PDF, EPUB and Kindle. Book excerpt: Phosphors are often consisting of transition-metal compounds or rare-earth compounds, with the most common application being displays and fluorescent light. This book will guide the reader through the latest developments in thermo-, electro-, mechano- and bioluminescence of rare earth phosphors and crystals. Also, the effect of doping will be discussed.

New Generation of Europium- and Terbium-Activated Phosphors

2011-09-02 Science
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Release : 2011-09-02
Genre : Science
Kind : eBook
Book Rating : 778/5 ( reviews)

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Book Synopsis New Generation of Europium- and Terbium-Activated Phosphors by : Mihail Nazarov

Download or read book New Generation of Europium- and Terbium-Activated Phosphors written by Mihail Nazarov. This book was released on 2011-09-02. Available in PDF, EPUB and Kindle. Book excerpt: This book concentrates on the luminescence and structural properties of the new generation of europium and terbium activated phosphors, associated phenomena, and related topics, from basic principles to the most recent discoveries. It summarizes the present state of the art in this rapidly growing field. The authors describe recent developments in the areas of rare earth doped phosphors and of some new materials or well-known materials with improved properties that open up new possibilities. The areas of focus include X-ray phosphors, phosphors for light-emitting devices, emissive displays, and fluorescent lamps. The book comprises theoretical and experimental analysis of various properties of phosphors, research methods and preparation techniques, and some promising applications.

New Generation of Europium- and Terbium-Activated Phosphors

2011-09-02 Science
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Release : 2011-09-02
Genre : Science
Kind : eBook
Book Rating : 053/5 ( reviews)

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Book Synopsis New Generation of Europium- and Terbium-Activated Phosphors by : Mihail Nazarov

Download or read book New Generation of Europium- and Terbium-Activated Phosphors written by Mihail Nazarov. This book was released on 2011-09-02. Available in PDF, EPUB and Kindle. Book excerpt: This book concentrates on the luminescence and structural properties of the new generation of europium and terbium activated phosphors, associated phenomena, and related topics, from basic principles to the most recent discoveries. It summarizes the present state of the art in this rapidly growing field. The authors describe recent developments in

Mechanisms Affecting Emission in Rare-earth-activated Phosphors

2000
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Release : 2000
Genre :
Kind : eBook
Book Rating : /5 ( reviews)

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Book Synopsis Mechanisms Affecting Emission in Rare-earth-activated Phosphors by :

Download or read book Mechanisms Affecting Emission in Rare-earth-activated Phosphors written by . This book was released on 2000. Available in PDF, EPUB and Kindle. Book excerpt: The relatively poor efficiency of phosphor materials in cathodoluminescence with low accelerating voltages is a major concern in the design of field emission flat panel displays operated below 5 kV. The authors research on rare-earth-activated phosphors indicates that mechanisms involving interactions of excited activators have a significant impact on phosphor efficiency. Persistence measurements in photoluminescence (PL) and cathodoluminescence (CL) show significant deviations from the sequential relaxation model. This model assumes that higher excited manifolds in an activator de-excite primarily by phonon-mediated sequential relaxation to lower energy manifolds in the same activator ion. In addition to sequential relaxation, there appears to be strong coupling between activators, which results in energy transfer interactions. Some of these interactions negatively impact phosphor efficiency by nonradiatively de-exciting activators. Increasing activator concentration enhances these interactions. The net effect is a significant degradation in phosphor efficiency at useful activator concentrations, which is exaggerated when low-energy electron beams are used to excite the emission.

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