Rare Earth Activated Phosphors Coating For Photoluminescent Textile PDF Download
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| Author | : Zhuoming Chen |
| Publisher | : |
| Total Pages | : 194 |
| Release | : 2016 |
| Genre | : Smart materials |
| ISBN | : |
Download Rare Earth Activated Phosphors Coating for Photoluminescent Textile Book in PDF, ePub and Kindle
The results reveal that the synthesized Y2́2O2́3:Eu℗đ1́ð phosphor with favorable photoluminescent properties is a desirable candidate as the evaporated target in the deposition process. The results also indicate that the Y2́2O2́3:Eu℗đ1́ð films deposited onto quartz fabric with a substrate temperature of 2504́3 exhibit optimal photoluminescent intensity after annealing treatment which is improved by 32.67% as opposed to annealed films grown at room temperature. The maximum photoluminescent intensity of the annealed Y2́2O2́3:Eu℗đ1́ð films deposited onto quartz fabric is observed with a deposition time of 15 min, which is improved by 124.73% in comparison to a deposition time of 5 min. The emission brightness is optimal when the annealed films are prepared with a deposition current of 140 mA, and the photoluminescent intensity is increased by 6317% when the deposition current is increased from 80 to 140 mA. Both annealing methods can effectively improve the photoluminescent properties of the Y2́2O2́3:Eu℗đ1́ð films deposited onto quartz fabric. The highest emission brightness of the Y2́2O2́3:Eu℗đ1́ð films deposited onto quartz fabric is obtained after furnace annealing at 10004́3 for 3 h and CO2́2 laser heating with a resolution of 35 dpi for 120 Îơs, and the photoluminescent intensity is improved by 1234.41% and 366.73%, respectively compared to that of the as-deposited films. This study indicates that EBE is a promising technology for the development of photoluminescent textiles. The experimental results suggest that the improved morphology and crystal properties of the Y2́2O2́3:Eu℗đ1́ð films are the major reasons for the increased photoluminescent properties of the deposited quartz fabric. The prepared photoluminescent textile that emits a red light has potential applications for anti-counterfeiting, security warning and decoration purposes.
| Author | : Ratnesh Tiwari |
| Publisher | : Walter de Gruyter GmbH & Co KG |
| Total Pages | : 258 |
| Release | : 2021-12-20 |
| Genre | : Science |
| ISBN | : 3110676451 |
Download Luminescence Book in PDF, ePub and Kindle
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.
| Author | : Mihail Nazarov |
| Publisher | : CRC Press |
| Total Pages | : 458 |
| Release | : 2011-09-02 |
| Genre | : Science |
| ISBN | : 9814364053 |
Download New Generation of Europium- and Terbium-Activated Phosphors Book in PDF, ePub and Kindle
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
| Author | : Jesse C. Reiherzer |
| Publisher | : |
| Total Pages | : 342 |
| Release | : 2009 |
| Genre | : |
| ISBN | : |
Download Synthesis and Photoluminescent Properties of Rare Earth Activated Nitride Phosphors Book in PDF, ePub and Kindle
| Author | : |
| Publisher | : |
| Total Pages | : 10 |
| Release | : 2000 |
| Genre | : |
| ISBN | : |
Download Mechanisms Affecting Emission in Rare-earth-activated Phosphors Book in PDF, ePub and Kindle
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.
| Author | : V. E. Oranovski |
| Publisher | : |
| Total Pages | : 8 |
| Release | : 1965 |
| Genre | : |
| ISBN | : |
Download Investigation Into the Spectra of Electro- and Photo-luminescent Phosphors Activated by Rare Earth Elements Book in PDF, ePub and Kindle
| Author | : Vijay Kumar |
| Publisher | : Springer Nature |
| Total Pages | : 405 |
| Release | : 2023-07-25 |
| Genre | : Science |
| ISBN | : 9819941458 |
Download Advanced Materials for Solid State Lighting Book in PDF, ePub and Kindle
This book highlights the synthesis, luminescence, and applications of rare earth-doped phosphors materials for solid-state lighting. Solid-state lighting is turning into a leading technology in the lighting industry, permitting improvement in the fields from architectural to domestic applications. Driven with the aid of using ongoing multi-field research, solid-state lighting needs an improvement of various technologies: efficient and reliable light-emitting devices, devices for new functionalities, and optical solutions for beam shaping. Noteworthy research endeavors were aimed to find out eco-friendly, better performance, cost, and energy-efficient phosphor materials for the application in solid-state lighting devices. Power phosphor materials with advanced optical and photoluminescence properties in a wide range of areas have shared the research efforts in this sector aimed in the direction of achieving better material features. Rare earth ion-doped phosphor materials have been the subject of scientific interest because of their significant applications in a variety of fields such as display devices, temperature sensors, solar cells, bio-imaging, and optoelectronics devices. This book covers the broad aspects of organic and inorganic materials based on phosphor materials and is beneficial to researchers involved in these areas. This book is specially designed to provide an introductory concept of luminescent materials, particularly man-made (artificial) phosphors in a language comprehensible to beginners and students. The book also includes some new materials with promising technologies and upgraded properties that expose new potential possibilities are also highlighted.
| Author | : Sanjay J. Dhoble |
| Publisher | : |
| Total Pages | : |
| Release | : 2018 |
| Genre | : Materials science |
| ISBN | : 9780429865367 |
Download Phosphors Book in PDF, ePub and Kindle
"Rare earthdoped luminescent materials play an integral role in modern life because of their tremendous applications ranging from scintillators, color displays, fluorescent lamps, and intensifying screens to dosimetry of ionizing radiations. Written and edited by prominent luminescence researchers, this book details cutting-edge research on luminescence materials and is illustrated throughout with excellent figures and references. It will appeal to anyone involved in luminescence research and its applications, especially advanced undergraduate-, graduate-, and postgraduate-level students of spectroscopy, solid state physics, luminescence, material synthesis, and optical properties and researchers working on the synthesis of optical materials, the characterization of luminescence materials, solid state lighting, radiation dosimetry luminescence, and phosphor applications."--Provided by publisher.
| Author | : |
| Publisher | : |
| Total Pages | : 2676 |
| Release | : 2002 |
| Genre | : Chemistry |
| ISBN | : |
Download Chemical Abstracts Book in PDF, ePub and Kindle
| Author | : Jianrong Qiu |
| Publisher | : Woodhead Publishing |
| Total Pages | : 309 |
| Release | : 2020-11-24 |
| Genre | : Technology & Engineering |
| ISBN | : 0128187727 |
Download Persistent Phosphors Book in PDF, ePub and Kindle
Persistent Phosphors: From Fundamentals to Applications provides an introduction to the key synthesis methods, characterization methods, physical mechanisms, and applications of this important luminescent materials system. The book covers basic persistent phosphorescence, introducing concepts such as emission, luminescence, phosphorescence, persistent phosphorescence and the development of persistent phosphors. Then, synthesis methods are reviewed and the connections between synthesis methods and improved materials properties are discussed. Characterization methods to investigate the trapping and de-trapping mechanism are also presented. Other sections cover the theoretical framework and energy band engineering models and materials with a focus on activators, hosts, emission bands and excitation bands. Finally, the most relevant applications of persistent phosphors are included for use in displays, safety signs, bio-labels and energy. Persistent Phosphors is an invaluable reference for materials scientists and engineers in academia and R&D. It is a key resource for chemists and physicists. Presents characterization techniques to reveal the photophysical and photochemical properties of defects for this important category of luminescent materials Discusses the structural role of defects in polycrystals and the capture-storing-migration-release progress of excited carriers Demonstrates the synthesis routes and potential applications for persistent phosphor materials
