By Rong-Jun Xie
Nitride Phosphors and Solid-State lighting fixtures offers an in-depth creation to the crystal chemistry, synthesis, luminescence, and purposes of phosphor fabrics for solid-state lighting fixtures, mostly concentrating on new nitride phosphors. Drawing on their wide experimental paintings, the authors supply a multidisciplinary learn of phosphor fabrics that encompasses fabrics technology, inorganic chemistry, solid-state chemistry, solid-state physics, optical spectroscopy, crystal box idea, and computational fabrics technological know-how. The booklet starts off with an advent to the foundations, semiconductor/phosphor fabrics, and characterizations of solid-state lights and white light-emitting diodes (LEDs). It then discusses the optical and luminescence techniques happening in optically lively facilities of reliable fabrics and offers the photoluminescence houses of conventional phosphors for white LEDs, together with garnets, aluminates, silicates, sulfides, oxysulfides, phosphates, and scheelites. the rest of the textual content specializes in newly constructed nitride phosphors. The authors describe the crystal chemistry of basic nitride compounds, the crystal constitution and photoluminescence houses of latest nitride phosphors, and artificial equipment for getting ready nitride phosphors. They element the structural research of nitride phosphors and current experimental and computational result of standard nitride phosphors. The authors additionally study key matters, equivalent to excitation and emission spectra, thermal quenching, and quantum potency. the ultimate bankruptcy explores functions of nitride phosphors in white LEDs for common lighting fixtures and liquid crystal display backlight reasons. masking novel luminescent fabrics, this ebook brings you modern at the evolving box of solid-state lights. It illustrates the basics, synthesis, houses, and purposes of the most recent nitride phosphor fabrics.
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The most popular white LEDs, made of a blue LED and a YAG:Ce phosphor, usually have high correlated color temperatures, often above 5,000 K, producing a “cold” bluish light. Today, thanks to advances in phosphor technologies, tunable correlated color temperatures (from 2,700 to 6,500 K) can be 18 Nitride Phosphors and Solid-State Lighting achieved through the combination of suitable phosphors. Furthermore, the luminous efficacy and color rendering of warm white LEDs (2,600 to 3,500 K, typically for house illumination) have recently been improved remarkably, now approaching or exceeding those of compact fluorescent lamps (CFLs).
Single crystals of SiC and their application to blue LEDs. Prog. Crystal Growth Charact. 23:127–151. , and Lengyel, O. 2003. Advanced light emitting diodes structures for optoelectronic applications. Thin Solid Film 433:22–26. Madelung, O. 1996. Semiconductors, basic data. 2nd ed. Berlin: Springer-Verlag. , Schubert, M. , Kim, J. , and Schubert, E. F. 2009. Improved color rendering and luminous efficacy in phosphor-converted white light-emitting diodes by use of dual-blue emitting active regions.