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Academic literature on the topic 'Phosphors – Spectra'

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Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Phosphors – Spectra"

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Tang, An, Tao Ma, Liduo Gu, Yongtao Zhao, Junhui Zhang, Haoming Zhang, Fengxiang Shao, and Hongsong Zhang. "Luminescence properties of novel red-emitting phosphor InNb1-xPxO4:Eu3+ for white light emitting-diodes." Materials Science-Poland 33, no. 2 (June 1, 2015): 331–34. http://dx.doi.org/10.1515/msp-2015-0050.

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AbstractInNb1-xPxO4:Eu3+ red phosphors were synthesized by solid-state reaction and their luminescence properties were also studied through photoluminescence spectra. The excitation and emission spectra make it clear that the as-prepared phosphors can be effectively excited by near-ultraviolet (UV) 394 nm light and blue 466 nm light to emit strong red light located at 612 nm, due to the Eu3+ transition of 5D0 → 7F2. The luminescence intensity is dependent on phosphorus content, and it achieves the maximum at x = 0.4. Excessive phosphorus in the phosphors can result in reduction of luminescence intensity owing to concentration quenching.With the increasing content of phosphorus, the phosphors are prone to emit pure red light. This shows that the InNb1.6P0.4O4:0.04Eu3+ phosphor may be a potential candidate as a red component for white light emitting-diodes.
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Qin, Haiming, Jun Jiang, Zhaohua Luo, and Haochuan Jiang. "YAG phosphor with spatially separated luminescence centers." Journal of Materials Chemistry C 4, no. 2 (2016): 244–47. http://dx.doi.org/10.1039/c5tc03151f.

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Baig, Nahida, N. S. Dhoble, N. S. Kokode, and S. J. Dhoble. "Photoluminescence Properties of Eu3+ and Ce3+ Activated Calcium Chlorophosphate Via Combustion Synthesis Method." Oriental Journal of Physical Sciences 1, no. 1-2 (August 24, 2016): 10–15. http://dx.doi.org/10.13005/ojps01.0102.03.

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Calcium chlorophosphate (Ca2PO4Cl) phosphors, activated by rare earth ions Eu3+ and Ce3+ were prepared by urea assisted combustion synthesis technique and their characterization and luminescent properties were studied. The synthesized phosphors were investigated by powdered XRD, SEM and Photoluminescence characterization (PL) methods. PL excitation spectra of Ca2PO4Cl:Eu3+/Ce3+ phosphor exhibit narrow bands in the near ultra violet (n-UV) range, and the PL emission spectra of Ca2PO4Cl: Eu3+/Ce3+ phosphor shows sharp narrow bands typical of rare earth ions. The bands observed in the PL emission and excitation spectra of Ca2PO4Cl: Eu3+/Ce3+ phosphors can be ascribed to the electronic transitions within 4f configurations of rare earth ions. The excitation peaks for Ca2PO4Cl: Eu3+ is in n-UV range. The obtained results suggest that these phosphors may be favorable for lamp industry.
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Liu, Sheng, Bei Ying Zhou, Shi Jia Gu, Lian Jun Wang, Wan Jiang, and Wei Luo. "A Promising Energy-Saving and Environmental-Friendly Lighting Device: High CRI White LED with Phosphor Materials." Materials Science Forum 848 (March 2016): 446–53. http://dx.doi.org/10.4028/www.scientific.net/msf.848.446.

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Two kinds of commercial LED phosphors (green phosphor LuAG:Ce3+ and red phosphor CaAlSiN3:Eu2+) with polymethyl methacrylate (PMMA) powders were mixed to prepare film phosphors with tunable emission peak in photoluminescence spectrum by flat vulcanizing machine under the temperature of 170 oC and pressure of 2 MPa. The physical phase, surface morphology, transmittance, luminescence spectra of samples were characterized by means of X-ray diffraction (XRD), Environmental scanning electron microscopy (ESEM), Ultraviolet-Visible (UV-Vis) spectrophotometry and Fluorescence spectrometer. The results show that the film phosphors phase was consistent with raw phosphors, phosphor particles were uniformly distributed, and fluorescence spectra with different proportions of phosphors in different position can be adjusted. Tested by HSP 3000 spectrum analyzer, the white LEDs fabricated by blue chip and composite film phosphor containing 5 wt% green phosphor and 1.5 wt.% red phosphor, which refers to the remote excitation technique, possessed color coordinate of (0.3715, 0.3280) and color rendering index (CRI) of 87 when it was driven at power of 36 V/140 mA, reaching the international advanced level.
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He, Da Wei, Yan Ning Shi, Tao Hou, and Dan Zhou. "Luminescence Properties of M2MgSi2O7: Re (M = Ba, Sr, Ca) (Re = Eu2+, Ce3+, Tb3+)." Key Engineering Materials 336-338 (April 2007): 622–24. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.622.

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A series of phosphors of M2MgSi2O7: Eu2+ (M=Ba,Sr,Ca) have been synthesized and studied. The excitation spectra measurement showed that the phosphors had absorption in long UV light, the excitation spectra of the phosphors consisted of two broad bands: one in the range from 280nm to 330 nm and the other from 360nm to 420 nm. The main excitation band centered at around 395nm was belong to 4f→5d transitions of Eu2+. Analysis of the spectra of Ce3+ and Tb3+ co-doped phosphor showed that energy transfer from Ce3+ to Tb3+ in Ba2MgSi2O7 under UV excitation was efficient.
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Jia, Lin Yan, Zhong Bao Shao, and Jun Feng Han. "Luminescence Properties of ZnO:Eu3+ Red Emitting Phosphor Prepared by Precipitation Method." Advanced Materials Research 690-693 (May 2013): 594–97. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.594.

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Zinc oxide doped with Eu3+ ions red emitting phosphors were prepared by precipitation method, and its luminescence properties were investigated. The phosphors were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL) spectra. The ZnO:Eu3+ phosphors were obtained at 600°C by calcining precipitation precursor. These phosphors can be effectively excited at 465nm. In emission spectra, the strongest peak at 616nm correlating to red emission is due to the electric dipole transition 5D07F2 of Eu3+ ions. Eu3+ions replaced Zn2+ ions and occupied the non-centrosymmetric sites in the ZnO matrix lattice. The phosphor particles with narrow distribution range are approximately 100-200nm in size. The luminescence properties of ZnO:Eu3+ phosphor with 8 mol% doping concentration of Eu3+ is optimal.
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Lisitsyn, Lisitsyna, Tulegenova, Ju, Polisadova, Lipatov, and Vaganov. "Nanodefects in YAG:Ce-Based Phosphor Microcrystals." Crystals 9, no. 9 (September 11, 2019): 476. http://dx.doi.org/10.3390/cryst9090476.

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The present paper focused on the study of spectral–kinetic characteristics of luminescence in two batches of yttrium aluminum garnet (YAG):Ce-based phosphors synthesized in different years by two manufacturers: NPO “Platan” in Russia and “GrandLux” in the People’s Republic of China (PRC). Upon studying the structural characteristics of the phosphors—elemental composition, morphology, and X-ray diffraction (XRD) patterns—it was concluded that both types of YAG:Ce phosphors are highly imperfect. The presence of heterogeneities of different nature was accompanied by the introduction—to compensate for charges and elastic stresses—of intrinsic lattice defects during synthesis. There is a high probability of creating complex defects during phosphor synthesis. Luminescence properties (full width at half maximum (FWHM), spectral position of the emission peaks, excitation spectra of emission, emission decay time) are affected by the nearest environment of the luminescence center; whereas the degree of correlation of defects (distance between the components of the donor–acceptor pair) does not depend on the concentration of impurities, intrinsic defects, and their ratio. The results do not fit into the framework of existing ideas regarding the processes in phosphors as systems with widely distributed luminescence centers. The patterns obtained in the paper are discussed based on a hypothesis according to which a nanodefect phosphorus crystal phase is formed during the synthesis.
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MURALEEDHARAN, R., M. S. K. KHOKHAR, V. P. NAMBOODIRI, and C. P. GIRIJAVALLABHAN. "N2 LASER INDUCED PHOTOLUMINESCENCE EMISSION IN (ZnS: ZnO):Cu PHOSPHORS." Modern Physics Letters B 10, no. 18 (August 10, 1996): 883–89. http://dx.doi.org/10.1142/s0217984996001000.

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Nitrogen laser induced photoluminescence (PL) emissions from (ZnS: ZnO):Cu powder phosphors have been carried out under varying conditions of sample preparation. The conditions for optimum efficiency of PL emission in (ZnS: ZnO):Cu phosphors and their spectral characteristics have been investigated. The emission peak in the PL spectra was found to shift towards longer wavelengths side as the concentrations of ZnO in (ZnS: ZnO) mixture was varied from 0% to 100%. The mechanism of PL emission in the above phosphor is explained on the basis of classical “Schon-Klassen” model.
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Lu, Hao-Ying, and Meng-Han Tsai. "The High-Temperature Synthesis of the Nanoscaled White-Light Phosphors Applied in the White-Light LEDs." Advances in Materials Science and Engineering 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/976106.

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The white-light phosphors consisting of Dy3+doped YPO4and Dy3+doped YP1-XVXO4were prepared by the chemical coprecipitation method. After the 1200°C thermal treatment in the air atmosphere, the white-light phosphors with particle sizes around 90 nm can be obtained. In order to reduce the average particle size of phosphors, the alkaline washing method was applied to the original synthesis process, which reduces the particle sizes to 65 nm. From the PLE spectra, four absorption peaks locating at 325, 352, 366, and 390 nm can be observed in the YPO4-based phosphors. These peaks appear due to the following electron transitions:6H15/2→4K15/2,6H15/2→4M15/2+6P7/2,6H15/2→4I11/2, and6H15/2→4M19/2. Besides, the emission peaks of wavelengths 484 nm and 576 nm can be observed in the PL spectra. In order to obtain the white-light phosphors, the vanadium ions were applied to substitute the phosphorus ions to compose the YP1-XVXO4phosphors. From the PL spectra, the strongest PL intensity can be obtained with 30% vanadium ions. As the concentration of vanadium ions increases to 40%, the phosphors with the CIE coordinates locating at the white-light area can be obtained.
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Wang, Jun-Feng, Hao Zu, Chuan-Wen Lin, Shou-Jun Ding, Peng-Yu Shao, and Ye Xia. "Synthesis and Luminescence Properties of SrGd2O4:Eu3+ Red Phosphors." International Journal of Optics 2020 (April 14, 2020): 1–5. http://dx.doi.org/10.1155/2020/3095429.

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As one of the important raw materials for LED products, phosphors play an important role. At present, the spectrum of LED phosphors lacks red light, resulting in poor quality of white LED products and a low color rendering index (Ra <80), which affects lighting effects. To solve this problem, we synthesized the SrGd2O4:Eu3+ red phosphor by a high-temperature solid-phase method. The structure and luminescence properties of SrGd2O4:Eu3+ red phosphors were studied by means of X-ray diffraction (XRD) measurements of their emission and excitation spectra, and their spectra were analyzed. We also studied the Eu3+ doping concentration with the best luminous efficiency and the color coordinate of the SrGd2O4:Eu3+ phosphor. The experimental results show that SrGd2O4:Eu3+ is a new red phosphor material that can be used for near-ultraviolet or blue-light excitation and has good practicability.
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Dissertations / Theses on the topic "Phosphors – Spectra"

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Shalav, Avi School of Photovoltaic &amp Renewable Energy Engineering UNSW. "Rare-earth doped up-converting phosphors for an enhanced silicon solar cell response." Awarded by:University of New South Wales. School of Photovoltaic and Renewable Energy Engineering, 2006. http://handle.unsw.edu.au/1959.4/24184.

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Photovoltaic solar cells can generate electricity directly from sunlight without emitting harmful greenhouse gases. This makes them ideal candidates as large scale future energy producers for the global energy economy. Ideally, solar cells should be efficient and inexpensive to compete in the global energy market. Unfortunately, a number of fundamental limitations exist for the efficiency due to fundamental loss mechanisms of the semiconductor materials used to make solar cells. One of the dominant loss mechanisms from a conventional silicon solar cell is the transparency of sub-bandgap near-infrared photons. Up-conversion is an optical process involving the sequential absorption of lower energy photons followed by luminescence of a higher energy photon. This mechanism could be exploited to minimise photovoltaic sub-bandgap losses. Rare-earth doped materials have ideal up-conversion luminescent properties and have been utilised for many near-infrared to visible applications. This thesis investigates the near-infrared to near-infrared up-conversion processes required for the sub-bandgap photon utilisation within a silicon photovoltaic device. Various sodium yttrium fluoride phosphors doped with rare-earths were characterised theoretically and experimentally. Erbium doped phosphors were found to be ideal for single wavelength power dependent investigations for the non-linear up-conversion processes. The radiative and non-radiative rates of various erbium doped sodium yttrium fluoride phosphors have been approximated and compared with experimental photoluminescence results. These phosphors have been applied to the rear of a bi-facial silicon solar cell and an enhancement in the near-infrared region has been demonstrated. An external quantum efficiency close to 3.4% was measured at 1523nm under 6mW laser excitation. The non-linear dependence on incident pump power has been investigated along with the dominant up-conversion mechanisms involved. It can be concluded that up-conversion phosphors can enhance the near-infrared spectral response of a silicon device. These phosphors have high luminescent efficiencies once up-conversion occurs, but suffer from poor infrared absorption and low up-conversion efficiencies. The results from this study show that relatively high doping levels of selected rare-earths into low phonon energy crystals can improve the absorption and luminescent properties of the phosphor.
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Lazraq, Mohamed. "Derives doublement lies du bore, du phosphore et du germanium : phosphaborenes et germenes." Toulouse 3, 1988. http://www.theses.fr/1988TOU30141.

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De nouvelles methodes de synthese de diphosphadiboretannes-1,3,2,4 sont decrites. Un derive a double liaison bore-phosphore du type rb=par (avec r=tetramethyl-2,2,6,6 piperidyl et ar=tri-t-butyl-2,4,6 phenyl) a ete mis en evidence par piegeage in situ. Le premier derive stable a double liaison germanium-carbone a ete prepare: il s'agit du dimesityl fluoremylidene germane. Sa caracterisation a ete effectuee par diverses methodes physicochimiques et sa reactivite chimique, etudiee
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Sjöqvist, Jonas. "Platinum(II) and phosphorous MM3 force field parameterization for chromophore absorption spectra at room temperature." Thesis, Linköping University, Computational Physics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-18804.

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The absorption properties of the Pt1 chromophore at room temperature have been studied. Stretch, bend and torsion parameters for Pt(II), P, C (type 1, 2 and 4) and H have been parameterized for use in the MM3 force field. Parameters were fitted to energies computed at the B3LYP level of theory. The parameterized model was used to perform molecular dynamics simulations at room temperature. This was done for several environments and for time periods of up to 200 ps. Absorption properties were computed for snapshots from the dynamics, from which average absorption spectra were created. A conformational broadening of around 40 nm was found in the theoretical spectra, which is in good agreement with experiments. Due to a lack of solvent-solute interactions and the use of a less extensive basis set, a systematic blue shift of 40 nm is evident in the computed spectra.

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Carniato, Denis. "Nouveaux inhibiteurs de l'alanine racemase : les acides α-aminophosphoniques β-fonctionnalisés." Paris 6, 1986. http://www.theses.fr/1986PA066029.

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L'objectif de ce travail a été de concevoir, de synthétiser et d'évaluer les molécules polyfonctionnelles susceptibles d'inhiber spécifiquement deux enzymes de la biosynthèse du peptidoglycane, constituant essentiel de la paroi bactérienne: l'alanine racemase et la d-alanimne: d-alanine ligase. Leur inhibition devrait conduire à la formation d'une paroi altérée, ce qui doit rendre le microorganisme non viable. Les molécules synthétisées, basées sur le concept d'inhibiteurs irréversibles de type "substrats suicides", sont des acides α-aminophosphoniques et phosphiniques β-fonctionnalisés. Ils se sont avérés être de bons inhibiteurs compétitifs des enzymes de Pseudomonas aeruginosa (Gram-) et de streptococcus faecalis (Gram+), mais aucune irréversibilité n'a pu être observée. Cette étude a mis en évidence des incertitudes quant au mécanisme d'inhibition de l'alanine racemase par les acides α-aminophosphoniques.
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Pouységu, Laurent. "Détermination structurale de sucres par RMN 29Si,13C et 31P : expériences INEPT et DEPT associées à des simulations de spectres." Bordeaux 1, 1997. http://www.theses.fr/1997BOR10583.

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UNE METHODE GENERALE DE DETERMINATION STRUCTURALE DES SUCRES PAR RMN 29Si,13C et 31P A ETE DEVELOPPEE. L'EXPLOITATION DES PROPRIETES DES SEQUENCES INEPT (NON REFOCALISE, REFOCALISE-DECOUPLE 1D OU 2D) ET DEPT ETENDU PERMET DE REALISER L'ANALYSE CONFORMATIONNELLE D'HEXOPYRANOSES DIVERSEMENT SUBSTITUES. ASSOCIEES A DES SIMULATIONS DE SPECTRES, CES EXPERIENCES CONDUISENT A LA LOCALISATION DES SUBSTITUANTS SUR LE CYCLE PYRANOSIQUE, AINSI QU'A L'ATTRIBUTION DES ATOMES DE CARBONE CYCLIQUES. UNE PROPRIETE DE COUPLAGE HOMONUCLEAIRE 31P-31P (INTERACTION DE TYPE COORDINATIF) A EGALEMENT ETE OBSERVEE POUR LA PREMIERE FOIS LORS DE L'ANALYSE DE SUCRES PERPHOSPHITYLES.
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Zaim, Wadghiri Youssef. "Méthodologies pour l'utilisation clinique de la spectroscopie RMN : cas du phosphore-31 ; quantification ; mesures thermométriques." Lyon 1, 1994. http://www.theses.fr/1994LYO10349.

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Le chapitre i du manuscrit fait un appel succinct des bases physiques de la spectroscopie rmn. Les methodes recentes employees et les applications medicales de la spectroscopie rmn du 31p in vivo y sont egalement decrites et une attention particuliere est portee sur l'etude du muscle et du cerveau. Le chapitre ii concerne les developpements techniques elabores pour l'observation in vivo du phosphore-31 dans un aimant a 4,7 tesla de diametre utile 36 cm. Cette partie du travail a porte notamment sur la realisation d'un ergometre permettant de correler travail musculaire et spectres rmn et sur la conception d'une antenne adaptee a une couveuse pour l'observation du cerveau chez le nouveau-ne. Le chapitre iii est consacre a l'optimisation d'une methode parametrique de quantification des signaux rmn in vivo developpee au laboratoire. Cette methode est actuellement utilisee pour l'analyse automatique des spectres rmn obtenus au cours de cinetiques. Le dernier chapitre aborde les effets d'echauffements radiofrequence pouvant etre occasionnees au cours d'une experience de rmn a champ eleve, notamment en spectroscopie in vivo. Une methode de cartographie de temperature mettant a profit la dependance du deplacement chimique du noyau de cobalt-59 vis a vis de la temperature est proposee
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Khalid, Ashiq Hussain. "Development of phosphor thermometry systems for use in development gas turbine engines." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/development-of-phosphor-thermometry-systems-for-use-in-development-gas-turbine-engines(f01316f9-4622-4a6d-b2d0-611a9191b5eb).html.

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The pursuit for improved engine efficiency is driving the demand for accurate temperature measurement inside turbine engines. Accurate measurement can allow engines to be operated closer to their design limits to improve thermal efficiency. It can enable engineers to verify mechanical integrity, provide better prediction of component life, validate CFD and other design tools and aid the development for leaner more efficient engines. Unfortunately, experimentally measuring surface temperatures under harsh rotating conditions is challenging. This EngD study conducted by Ashiq Hussain Khalid at the University of Manchester and Rolls-Royce plc, reviews the rationale of using phosphor thermometry over existing methods, including thermocouples, pyrometry and thermal paints/melts, which lack detail, accuracy, or are too expensive for continuous testing. Although phosphor thermometry exhibits desirable characteristics, the high temperature and fast rotating engine environment presents some challenges that would need to be addressed before a successful measurement system can be implemented. Examples of such issues include: rising blackbody radiation, restricted optical access, fibre optic constraints and limited time period to collect data. These factors will impose measurement limits and greatly influence the design philosophy of the system, including phosphor choice, phosphor lifetime characteristics, bonding technique, excitation/detection methodologies and probe design. Taking these into consideration, the research focuses on the development of phosphor thermometry systems for use in development gas turbine engines, with measurement solutions for specific engine components. The high pressure turbine blade was given research priority. A number of phosphors including YAG:Tb, YAG:Tm. Y2O3:Eu and Mg3F2GeO4:Mn were investigated and characterised in terms of intensity and lifetime decay, with increasing temperature up to 1500oC. Spectral analysis and absolute intensity measurements established emission peaks and permitted comparative quantitative analysis to optimise system setup. The intensity of phosphor emission relative to Planck's blackbody radiation was also performed. YAG:Tm under 355nm illumination was found to exhibit the highest emission intensity at high temperatures, and because its spectral emission peak at 458nm was the lowest, its advantage in terms of blackbody radiation was further amplified. For rotating components, an upper temperature limit is reached based on the emission intensity at rising blackbody radiation levels and the system's ability to detect fast decays. A lower limit is reached based on the quenching temperature, probe design and rotational velocity. There are different methods to correct the distorted decay waveform as it traverses through the acceptance cone of the fibre. A phosphor selection criterion, taking into consideration these limitations, was successfully applied for various rotating engine components. The optical layout was setup and tested on stationary and rotating cases under laboratory conditions using similar design constraints, including fibre choice, maximum permissible lens size and target distances. A series of tests validated design methodologies and assumptions to enable testing on full scale rotating engine components. Mg3F2GeO4:Mn, using 355nm illumination, was found to be the most suitable phosphor for the HP drive cone. The estimated performance under the expected rotational speeds was found to be 624-812°C with a standard uncertainty of ±0.99%. YAG:Tm, illuminated with 355nm, was found to be the most promising phosphor for high pressure turbine blade measurements. The performance under the expected rotational speeds was found to be 1117-1375°C with a standard uncertainty of ±0.97%. This is better than other competing technologies that are currently available for temperature measurement of rotating turbine blades.
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Ranaivonjatovo, Henri Jacques. "Derives du phosphore et de l'arsenic dicoordonnes doublements lies : diphosphenes, diarsenes et phospha-arsenes." Toulouse 3, 1986. http://www.theses.fr/1986TOU30069.

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Synthese de diphosphenes, diarsenes et phospha-arsenes par la voie organolithiee (action de lithiens encombres sur les dichlorophosphines). L'action du dbu sur les trichlorogermyl phosphines rp(h)gecl::(3) s'est revelee une voie d'acces generale aux disphosphenes. Reactivite, structures
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Mercaderre, Lydie. "Proprietes cristallines et electroniques des depots de silicium lpcvd dopes in-situ (dopants bore et phosphore)." Toulouse, INSA, 1988. http://www.theses.fr/1988ISAT0009.

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Etude d'echantillons appartenant a trois series de depots (non dopes, dopes bore et dopes phosphore in-situ). Caracterisation de la structure cristalline par les techniques rheed, tem, raman, rugosite de surface. Consideration des proprietes optiques, electriques et physicochimiques. Existence d'une etroite correlation entre la microstructure fine et les proprietes electroniques des couches. Etude de l'aptitude des methodes optiques (reflectometrie, et plus particulierement ellipsometrie bi-angulaire) a la caracterisation des depots. Mise en evidence, vis a vis de ces proprietes, d'une part du comportement specifique des depots dopes bore in situ, et d'autre partm de l'existence de valeurs "seuil" de la temperature de depot, qui different suivant les couches considerees
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Barra, Anne-Laure. "Etude d'observabilité de la non conservation de la parité par résonance magnétique nucléaire ; étude expérimentale du tenseur d'écran du triphénylphosphirène." Grenoble 1, 1988. http://www.theses.fr/1988GRE10025.

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Afin d'etudier la faisabilite d'une experience de rmn mettant en evidence la non conservation de la parite (ncp) au niveau moleculaire, on a etabli les expressions des contributions de ncp aux tenseurs d'ecran magnetique et de couplage indirect par un formalisme de perturbations. La mise en evidence de ces contributions repose sur la detection d'un dedoublement des raies de resonance de 2 enantiomeres. Une evaluation de l'effet attendu a ete faite sur des molecules modeles, a l'aide du programme rex
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Books on the topic "Phosphors – Spectra"

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Symposium on Luminescence Science and Technology (1988 Chicago, Ill.). Proceedings of the Symposium on Luminescence Science and Technology. Pennington, NJ (10 S. Main St., Pennington 08534-2896): Electrochemical Society, 1988.

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Krasovit͡skiĭ, B. M. Organic luminescent materials. Weinheim: VCH, 1988.

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Bogusława, Jeżowska-Trzebiatowska, Legendziewicz J, and Stręk W, eds. Rare earths spectroscopy: Proceedings of the International Symposium on Rare Earths Spectroscopy, Wrocław, Poland, September 10-15, 1984. Singapore: World Scientific Pub., 1985.

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Qiang, Su, ed. Proceedings of the Second International Symposium on Rare Earths Spectroscopy, Changchun, P.R. China, September 9-14, 1989. Singapore: World Scientific, 1990.

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Lumpur), International Symposium on Rare Earths (2012 Kuala. Proceedings: International Symposium on Rare Earths, 7th May 2012 at Kuala Lumpur and Intellectual Discourse : Green Opportunities in Rare Earth Industries, 9th May 2012 at Kuala Lumpur. Kuala Lumpur: Akademi Sains Malaysia, 2012.

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1964-, Williams Anthony J., ed. Practical interpretation of P-31 NMR spectra and computer-assisted structure verification. Toronto: Advanced Chemistry Development, 2004.

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Assaaoudi, Hassane, and Ian S. Butler. Synthesis, Structural and Spectroscopic Properties of Some New Erbium-Based Materials. Nova Science Publishers, Incorporated, 2012.

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1933-, Tebby John C., ed. CRC handbook of phosphorus-31 nuclear magnetic resonance data. Boca Raton: CRC Press, 1991.

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Tebby, John C. Handbook of Phosphorus-31 Nuclear Magnetic Resonance Data. CRC Press, 1990.

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1928-, Quin Louis D., and Verkade John G. 1935-, eds. Phosphorus-31 NMR spectral properties in compound characterization and structural analysis. New York: VCH, 1994.

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Book chapters on the topic "Phosphors – Spectra"

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Zhang, Na, Renju Cheng, Hanwu Dong, Haili Li, Wenjun Liu, Bin Jiang, and Liu Yang. "Effect of Ambient Temperature on the Emission Spectra of Mg2+- and Ga3+-Doped CaS:Eu2+ Red Phosphors." In Springer Proceedings in Physics, 113–19. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-5947-7_13.

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Kemp, William. "Phosphorus-31 NMR Spectra." In NMR in Chemistry, 176–81. London: Macmillan Education UK, 1986. http://dx.doi.org/10.1007/978-1-349-18348-7_10.

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van Lierop, Ben, Laurence Castle, Alexandre Feigenbaum, and Achim Boenke. "Phosphoric acid, tributoxyethyl ester." In Spectra for the Identification of Additives in Food Packaging, 308–12. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5222-8_61.

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van Lierop, Ben, Laurence Castle, Alexandre Feigenbaum, and Achim Boenke. "Phosphoric acid, tributyl ester." In Spectra for the Identification of Additives in Food Packaging, 313–17. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5222-8_62.

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van Lierop, Ben, Laurence Castle, Alexandre Feigenbaum, and Achim Boenke. "Phosphoric acid, triisobutyl ester." In Spectra for the Identification of Additives in Food Packaging, 318–22. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5222-8_63.

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van Lierop, Ben, Laurence Castle, Alexandre Feigenbaum, and Achim Boenke. "Phosphoric acid, triphenyl ester." In Spectra for the Identification of Additives in Food Packaging, 323–27. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5222-8_64.

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Song, Meiping, En Li, Chein-I. Chang, Yulei Wang, and Chunyan Yu. "Spectral Characteristics of Nitrogen and Phosphorus in Water." In Lecture Notes in Electrical Engineering, 569–78. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6504-1_69.

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van Lierop, Ben, Laurence Castle, Alexandre Feigenbaum, and Achim Boenke. "Phosphoric acid, diphenyl 2-ethylhexyl ester." In Spectra for the Identification of Additives in Food Packaging, 303–7. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5222-8_60.

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van Lierop, Ben, Laurence Castle, Alexandre Feigenbaum, and Achim Boenke. "Phosphoric acid, tris(2-ethylhexyl) ester." In Spectra for the Identification of Additives in Food Packaging, 328–32. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5222-8_65.

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Dobhal, M. P. "Spectral data of phosphorus complex of porphyrin derivative C56H34N7O6P." In Porphyrins - Spectral Data of Porphyrin Isomers and Expanded Porphyrins, 529. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-47224-8_281.

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Conference papers on the topic "Phosphors – Spectra"

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Ignatovych, M., A. Kelemen, A. Peto, and O. Chuiko. "Photoluminescence and radioluminescence spectra of x-ray phosphors." In SPIE Proceedings, edited by Sergey V. Svechnikov and Mikhail Y. Valakh. SPIE, 2003. http://dx.doi.org/10.1117/12.497172.

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Srećković, A., S. Djeniže, J. Labat, M. Platiša, and J. Purić. "Stark broadening regularities within successive ionization stages of phosphorus." In Spectral line shapes. AIP, 1990. http://dx.doi.org/10.1063/1.39875.

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Liu, Yanping, Zhaoyang Chen, Yanwei Fan, Weizhen Ba, and Shilie Pan. "A Novel Radiation Dosimetry Based on Optically Stimulated Luminescence." In 16th International Conference on Nuclear Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/icone16-48023.

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A new generation of Alkaline earth sulfides (MgS, CaS, and BaS) doped with rare-earth ions have been identified by the University of Montpellier as the very high sensitivity of these phosphors, the short time constant of the luminescence and the perfectly separated spectra enable many applications in real time and online dosimetry. The online detecting technology of optically stimulated luminescent (OSL) radiation dosimeter main make use of the OSL characteristics of doping the alkaline-earth metal sulphides, makes the material into the thin films for storing energy from Ionizing radiation, the excitation light through optical fibers reached the where under radiation-field, with a sensitive detection device to read out the radiation dose from storing the OSL material, obtains a novel technology of radiation dose measurement. In the previous works, the dosimeter benefits from a printed circuit board mount. Both the sensor and the electronics are exposed to radiation, the problem of the radiation induced damage is supposedly being addressed. In both cases, the use of optical fibers can provide an elegant solution. Optical fibers offer a unique capability for remote monitoring of radiation in difficult-to-access and hazardous locations. Optical fiber can be located in radiation hazardous areas and optically interrogated from a safe distance. Hence, optical fiber dosemeters are immune to electrical and radio-frequency interference that can seriously degrade the performance of remote electronic dosimeters. In this paper, a novel remote optical fiber radiation dosimeter is described. The optical fiber dosimeter takes advantage of the charge trapping materials CaS:Ce, Sm and SrS:Eu, Sm that exhibit optically stimulated luminescence (OSL). The range of the dosimeter is from 0.01 to 1000Gy. The optically stimulated luminescent (OSL) radiation dosimeter technically surveys a wide dynamic measurement range and a high sensitivity. The equipment is relatively simple and small in size, and has low power consumption. This device is suitable for measuring the space radiation dose; it also can be used in high radiation dose condition and other dangerous radiation occasions.
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Mickish, Daniel J., and Jacob Beutel. "Determination of x-ray phosphor scintillation spectra." In Medical Imaging '90, Newport Beach, 4-9 Feb 90, edited by Roger H. Schneider. SPIE, 1990. http://dx.doi.org/10.1117/12.18809.

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Pardayev, O., Sh Ismoilov, P. M. Champion, and L. D. Ziegler. "Vibrational Spectra of Phosphorus Compounds With Multiple Bonds." In XXII INTERNATIONAL CONFERENCE ON RAMAN SPECTROSCOPY. AIP, 2010. http://dx.doi.org/10.1063/1.3482675.

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Li, Yue-Rong, Gavin Pereira, Masoud Kasrai, and Peter R. Norton. "Studies on ZDDP Anti-Wear Films Formed Under the Different Conditions by XANES Spectroscopy, Atomic Force Microscopy and 31P NMR." In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44218.

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Antiwear (AW) films, generated from a mineral base oil containing zinc dialkyl dithiophosphate (ZDDP) additive, were extensively studied. These films were formed at various conditions such as different temperatures, various loads and rubbing times. The surface morphology of these films was investigated using atomic force microscopy (AFM) and the surface roughness of these films has been calculated from the images. X-ray absorption near edge structure (XANES) spectroscopy has been used to characterize the chemistry of these films. The intensity of phosphorus K-edge was also used to monitor the thickness of these films. Phosphorus L-edge spectra show that these films have slightly variable chemical natures. 31P Nuclear magnetic resonance (31P NMR) was used to study the ZDDP components in the residue oils. The spectra show that the primary and secondary ZDDP decompose quite differently at the various conditions. Tribological characteristics of these AW films were probed by measuring the coefficients of friction and the wear scar width of the counter faces.
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Seyfried, H., G. Sa¨rner, A. Omrane, M. Richter, H. Schmidt, and M. Alde´n. "Optical Diagnostics for Characterization of a Full-Size Fighter-Jet Afterburner." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-69058.

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In the present work the feasibility of using various optical/laser based techniques for characterization of the afterburner of a full-size aircraft engine have been investigated. The tests have been performed on-site at Volvo Aero Corporation and were mainly directed towards surface thermometry using thermographic phosphors and fuel visualization. All applications were studied for different engine running conditions, including various use of the afterburner (A/B). Laser-Induced Fluorescence (LIF) was employed for fuel visualization to investigate to what extent unburned fuel exits the afterburner. Laser-Induced Phosphorescence (LIP) from thermographic phosphors was used to measure two-dimensional surface temperatures on the outlet nozzle of the afterburner. In addition, the spectral characteristics of the burning jet stream were investigated.
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Prakash, Ram, Sandeep Kumar, Rubby Mahajan, Pooja Khajuria, Vinay Kumar, R. J. Choudhary, and D. M. Phase. "Spectral properties of Dy3+ doped ZnAl2O4 phosphor." In 2ND INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5032375.

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Deresch, A., M. Jechow, and C. Gollwitzer. "Spectral characterization of storage phosphor imaging plates." In 40TH ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Incorporating the 10th International Conference on Barkhausen Noise and Micromagnetic Testing. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4865040.

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Wang, Jiaqi, Jeffery C. C. Lo, S. W. Ricky Lee, Feng Yun, and Mian Tao. "Modeling and Parametric Study of Light Scattering, Absorption and Emission of Phosphor in a White Light-Emitting Diode." In ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ipack2015-48664.

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In this study, we proposed and demonstrated an effective approach to model and predict spectral power distribution (SPD) for a phosphor-converted light emitting diode (pc-LED). For emission and excitation, broadband diffuse transmittances of 1 mm YAG:Ce phosphor plates with different concentrations were measured by a spectrophotometer. For emission, it was found that transmittance for all wavelengths was almost identical. This result indicates that emission spectrum prediction could be simplified by simulating the radiant power of the peak wavelength only. At the peak wavelength (560 nm), our simulation results, in which optical constants were calculated by the Lorenz-Mie theory, agreed well with our measurements. For excitation, a novel transmittance measurement setup based on an LED goniophotometer was proposed to obtain the absorption coefficient. By adjusting the optical parameter in our ray-tracing model to fit measured transmittances, accurate absorption coefficients were determined. Based on our calculation and measured optical parameters, we simulated the radiant power of the blue light and yellow light of commercial white LED packages. By expanding the total blue and yellow power into linear combinations of wavelengths in both regions, we successfully predicted the SPD of our LED package. Our predicted SPD has good agreement with the measured results.
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