Design and Optimization of Phosphors for Solid-State Lighting Using First-Principles Calculations - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Design and Optimization of Phosphors for Solid-State Lighting Using First-Principles Calculations write by Zhenbin Wang. This book was released on 2018. Design and Optimization of Phosphors for Solid-State Lighting Using First-Principles Calculations available in PDF, EPUB and Kindle. The discovery of novel phosphors is key to the development of highly efficient and environmental friendly light-emitting diodes (LED)-based solid-state lighting. This discovery, however, has largely taken place through painstaking experiments in an Edisonian fashion. In this thesis, we use first-principles calculations to explore new phosphor materials and advance our understanding of photoluminescence (PL) properties. Phosphors with narrow-band emission are a critical component for high brightness LEDs and liquid crystal display (LCD) backlighting with wide color gamut. In the first part, we discovered a quantitative descriptor for narrow-band Eu2+-activated emission by comparing electronic structures of known narrow-band and broad-band phosphors. Incorporating this descriptor into a high throughput first principles screening of 2,259 nitride compounds, we identified five promising new nitride hosts for Eu2+-activated red-emitting phosphors that are predicted to exhibit good chemical stability, thermal quenching resistance and quantum efficiency, as well as narrow-band emission. In the second part, we performed a systematic investigation of structure-composition-property relationships in Eu2+-activated [beta]-SiAlON, one of the most promising narrow-band green phosphors. Using first-principles calculations, we first identified the most energetically favorable structure for [beta]-SiAlON:Eu2+ and then studied the effect of oxygen content and Eu2+ activator concentrations on the local EuN9 activator environment, and its impact on important PL properties such as emission peak position, bandwidth, and thermal quenching resistance. The insights obtained provide a constructive means to optimize the PL performance of [beta]-SiAlON in experiment. In the third part, we developed an approach to discover new oxide phosphors by mining unexplored chemistries with data-driven structure prediction and high-throughput screening. This approach was demonstrated by the prediction and experimental validation of a novel, earth-abundant Eu2+ and Ce3+-activated Sr2LiAlO4 phosphors. The Sr2LiAlO4:Eu2+/Ce3+ phosphors exhibit broad emissions at [lambda]max ~ 512 nm (green-yellow) and [lambda]max ~ 434 nm (blue), respectively, with excellent thermal quenching resistance of > 88% intensity at 150 C. A prototype white LED utilizing Sr2LiAlO4-based phosphors yields an excellent color rendering index exceeding 90.
Phosphate Phosphors for Solid-State Lighting
Phosphate Phosphors for Solid-State Lighting - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Phosphate Phosphors for Solid-State Lighting write by Kartik N. Shinde. This book was released on 2012-12-15. Phosphate Phosphors for Solid-State Lighting available in PDF, EPUB and Kindle. The idea for this book arose out of the realization that, although excellent surveys and a phosphor handbook are available, there is no single source covering the area of phosphate based phosphors especially for lamp industry. Moreover, as this field gets only limited attention in most general books on luminescence, there is a clear need for a book in which attention is specifically directed toward this rapidly growing field of solid state lighting and its many applications. This book is aimed at providing a sound introduction to the synthesis and optical characterization of phosphate phosphor for undergraduate and graduate students as well as teachers and researchers. The book provides guidance through the multidisciplinary field of solid state lighting specially phosphate phosphors for beginners, scientists and engineers from universities, research organizations, and especially industry. In order to make it useful for a wide audience, both fundamentals and applications are discussed, together.
Nitride Phosphors and Solid-State Lighting
Nitride Phosphors and Solid-State Lighting - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Nitride Phosphors and Solid-State Lighting write by Rong-Jun Xie. This book was released on 2016-04-19. Nitride Phosphors and Solid-State Lighting available in PDF, EPUB and Kindle. Nitride Phosphors and Solid-State Lighting provides an in-depth introduction to the crystal chemistry, synthesis, luminescence, and applications of phosphor materials for solid-state lighting, mainly focusing on new nitride phosphors. Drawing on their extensive experimental work, the authors offer a multidisciplinary study of phosphor materials tha
Phosphor Handbook
Phosphor Handbook - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Phosphor Handbook write by Vijay B. Pawade. This book was released on 2023-01-15. Phosphor Handbook available in PDF, EPUB and Kindle. Phosphor Handbook: Process, Properties and Applications provides a comprehensive overview of the latest advances in research on the synthesis, characterization and applications of organic and inorganic phosphors. There is detailed information presented on the characterization of the relevant phosphor groups, such as up-conversion and down-conversion phosphors, inorganic LED phosphors, organic LED phosphors and thermoluminescence and dosimetric phosphors using various physical and chemical advances. Finally, the advances in phosphor technologies are discussed, including current barriers to their use in commercial applications and emerging opportunities. This book is suitable for researchers and practitioners in academia and those working in R&D in industry in the disciplines of materials science and engineering, materials chemistry, materials physics, photonics science and technology, nanotechnology and physical chemistry. Introduces fundamentals of phosphor materials, including their mechanisms, properties and technologies Reviews the most important categories of phosphor materials (inorganic and organic) for use in light-emitting diodes and dosimetry Discusses advances in physical and chemical methods to synthesize and characterize phosphor materials
Phosphor Handbook
Phosphor Handbook - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Phosphor Handbook write by Ru-Shi Liu. This book was released on 2022-01-31. Phosphor Handbook available in PDF, EPUB and Kindle. A benchmark publication, the first edition of the Phosphor Handbook, published in 1998, set the standard for references in the field. The second edition, updated and published in 2007, began exploring new and emerging fields. However, in the last 14 years, since the second edition was published, many notable advances and broader phosphor applications have occurred. Completely revised, updated, and expanded into three separate volumes, this third edition of the Handbook covers the most recent developments in phosphor research, characterization, and applications. This volume on ‘Experimental Methods for Phosphor Evaluation and Characterization’ addresses the theoretical and experimental methods for phosphor evaluation and characterization. The chapters in the book cover: First principle and DFT analysis of optical, structural, and chemical properties of phosphors Phosphor design and tuning through structure and solid solution Design for IR, NIR, and narrowband emission and thermally stable phosphors and nanophosphors Detailed illustration for measurement of the absolute photoluminescence quantum yield of phosphors Phosphor analysis through photoionization, high pressure, and synchrotron radiation studies
