A Rare-Earth Phosphor Containing One-Dimensional Chains Identified Through Combinatorial Methods

Danielson, Earl; Devenney, Martin; Giaquinta, Daniel M.; Golden, J. H.; Haushalter, Robert C.; McFarland, Eric W.; Poojary, Damodara M.; Reaves, C. M.; Weinberg, W. H.; Wu, Xin

doi:10.1126/science.279.5352.837

Cited by 400 publications

(200 citation statements)

References 5 publications

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“…A key advantage of the inkjet delivery system is that precursors can be mixed at the molecular level in the nozzle prior to controlled delivery at each site, thus avoiding the need for thermal interdiffusion treatment of the library. 183 In another study, 176 electron beam deposition in a moving shutter system was used to create a large library containing composition gradients of multiple phosphor hosts as well as different RE dopants, Fig. 47.…”

Section: -23mentioning

confidence: 99%

Applications of high throughput (combinatorial) methodologies to electronic, magnetic, optical, and energy-related materials

Green

Takeuchi

Hattrick‐Simpers

2013

Journal of Applied Physics

227

189

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High throughput (combinatorial) materials science methodology is a relatively new research paradigm that offers the promise of rapid and efficient materials screening, optimization, and discovery. The paradigm started in the pharmaceutical industry but was rapidly adopted to accelerate materials research in a wide variety of areas. High throughput experiments are characterized by synthesis of a "library" sample that contains the materials variation of interest (typically composition), and rapid and localized measurement schemes that result in massive data sets. Because the data are collected at the same time on the same "library" sample, they can be highly uniform with respect to fixed processing parameters. This article critically reviews the literature pertaining to applications of combinatorial materials science for electronic, magnetic, optical, and energy-related materials. It is expected that high throughput methodologies will facilitate commercialization of novel materials for these critically important applications. Despite the overwhelming evidence presented in this paper that high throughput studies can effectively inform commercial practice, in our perception, it remains an underutilized research and development tool. Part of this perception may be due to the inaccessibility of proprietary industrial research and development practices, but clearly the initial cost and availability of high throughput laboratory equipment plays a role. Combinatorial materials science has traditionally been focused on materials discovery, screening, and optimization to combat the extremely high cost and long development times for new materials and their introduction into commerce. Going forward, combinatorial materials science will also be driven by other needs such as materials substitution and experimental verification of materials properties predicted by modeling and simulation, which have recently received much attention with the advent of the Materials Genome Initiative. Thus, the challenge for combinatorial methodology will be the effective coupling of synthesis, characterization and theory, and the ability to rapidly manage large amounts of data in a variety of formats. V C 2013 AIP Publishing LLC. [http://dx

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Section: -23mentioning

confidence: 99%

Applications of high throughput (combinatorial) methodologies to electronic, magnetic, optical, and energy-related materials

Green

Takeuchi

Hattrick‐Simpers

2013

Journal of Applied Physics

227

189

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“…These libraries were processed in air at temperatures from 900°C to 1100°C for 8 hours. The combinatorial libraries were characterized using a high throughput screen that illuminated the library with blue light to rapidly screen for potential hits 10,11 . A Ushio 200 W Hg/Xe lamp was used for illumination together with bandpass filters of 430, 450, and 465-nm (FWHM=25-35 nm) for phosphor excitation.…”

Section: Methodsmentioning

confidence: 99%

“…Our work employs combinatorial chemistry as a tool to rapidly generate libraries of garnet phosphors to examine the spectral trends in phosphors for application in blue to yellow conversion LEDs. Combinatorial methods for luminescent materials discovery have been used previously by several groups [8][9][10][11] . Various garnets of the formula, A 3-x B x C 5-y D y O 12 :Ce 3+ , where A, B = Y, Gd, Lu, La; C, D = Al, Ga, Sc; x and y = 0 to 1.0; and a Ce concentration of 1.0 mol% were synthesized and characterized.…”

Section: +mentioning

confidence: 99%

<title>Combinatorial synthesis and screening of Cerium-doped garnet phosphors for application in white GaN-based LEDs</title>

Danielson²,

DenBaars

et al. 2001

SPIE Proceedings

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A combinatorial approach has been used to generate solid state thin-film of different garnet structures (A 1-x ,B x ) 3-z (C 1-y ,D y ) 5 O 12 :Ce 3+ z (called libraries), where A, B = Y, Gd, Lu, La; C, D = Al, Ga, Sc; x and y = 0 to 1.0; and z = 0.03. X-ray diffraction was used to select library samples of the crystalline garnet phase. Combinatorial chemistry methods were used as a tool to rapidly synthesize and screen potential inorganic phosphors for use as blue to yellow conversion phosphors in white LEDs. Libraries of these various garnets were then characterized spectroscopically. Emission and excitation trends are reported for various libraries and were found to reproduce previous trends in literature. Lattice constants, chromaticity, and PL intensity are also examined as a function of the different compositions. Emission and excitation trends reveal that as larger cations are substituted for the Y (dodecahedral) site in YAG, emission and excitation are red-shifted and as larger cations are substituted for the Al (octahedral and tetrahedral) site, emission and excitation are blue-shifted. If smaller ions are substituted for those respective sites an opposite trend is observed.

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“…In these materials the optical transitions are based on a ligand-to-metal charge transfer (CT) from O 2-to Ce 4? [122,123]. It was found that the addition of Sn 4?…”

Section: Blue Phosphors-other Hostsmentioning

confidence: 99%

Inorganic Phosphor Materials for Lighting

2016

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This chapter addresses the development of inorganic phosphor materials capable of converting the near UV or blue radiation emitted by a light emitting diode to visible radiation that can be suitably combined to yield white light. These materials are at the core of the new generation of solid-state lighting devices that are emerging as a crucial clean and energy saving technology. The chapter introduces the problem of white light generation using inorganic phosphors and the structureproperty relationships in the broad class of phosphor materials, normally containing lanthanide or transition metal ions as dopants. Radiative and non-radiative relaxation mechanisms are briefly described. Phosphors emitting light of different colors (yellow, blue, green, and red) are described and reviewed, classifying them in different chemical families of the host (silicates, phosphates, aluminates, borates, and non-oxide hosts). This research field has grown rapidly and is still growing, but the discovery of new phosphor materials with optimized properties (in terms of emission efficiency, chemical and thermal stability, color, purity, and cost of fabrication) would still be of the utmost importance.

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A Rare-Earth Phosphor Containing One-Dimensional Chains Identified Through Combinatorial Methods

Cited by 400 publications

References 5 publications

Applications of high throughput (combinatorial) methodologies to electronic, magnetic, optical, and energy-related materials

Applications of high throughput (combinatorial) methodologies to electronic, magnetic, optical, and energy-related materials

<title>Combinatorial synthesis and screening of Cerium-doped garnet phosphors for application in white GaN-based LEDs</title>

Inorganic Phosphor Materials for Lighting

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