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Dissertations / Theses on the topic 'Solid-State Luminescent Materials'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 September 2023

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1

Katelnikovas, Artūras. "Synthesis and characterization of luminescent materials for solid state light sources." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20121227_090417-03709.

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The modern society relies heavily on mankind’s ability to produce light to lengthen the day. Throughout the evolution of artificial lighting lots of light sources were discovered / invented, i.e. burning wood, oil, candles, using incandescent bulbs and fluorescent lamps and, finally, white LEDs. LEDs are superior to other light sources due to their high efficiency. Replacement of conventional light sources by white LEDs what would allow saving huge amounts of electricity consumed for lighting purposes. The main goal of this dissertation was development and investigation of various new material

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2

Kenta, Nishino. "Advanced Luminescent Materials Based on Conjugated Carboranes." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225625.

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3

Yu, Tingting. "Solid state luminescent molecules, macromolecules and materials, their response to stimuli and their applications in devices." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEN061.

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Au cours de cette thèse, nous avons développé de nouveaux chromophores conjugués luminescents présentant une alternance de groupements donneurs et accepteurs, avec une attention particulière quant à leurs propriétés d’émission dans le rouge et proche infra-rouge à l’état solide ou agrégats. Nous avons étudié l’influence de la longueur de chaine et de la nature de la substitution donneur/accepteur non seulement sur les propriétés optiques en solution mais aussi (et surtout) sur le matériau agrégé. Enfin, en utilisant les propriétés spécifiques de certains des composés développés selon cette app

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4

Ljubica, Đačanin. "Luminescentna svojstva litijum-indijum oksida dopiranog jonima retkih zemalja." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2015. https://www.cris.uns.ac.rs/record.jsf?recordId=90817&source=NDLTD&language=en.

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Predmet istraživanja ove doktorske disertacije su prahovi litijum-indijum oksida dopirani različitim jonima retkih zemalja (Eu<sup>3+</sup>; Sm<sup>3+</sup>; Er<sup>3+</sup>; Yb<sup>3+</sup>), sintetisani reakcijom u  čvrstoj fazi. Litijum-indijum oksid ima raznovrsne potencijalne primene u viduscintilatora,  matrice fosfora za jone retkih zemalja, za  čuvanje i konverziju energije i u fotokatalizi. U istraživanju je ustanovljena optimalna metoda sinteze fazno  čistih prahova novih fosfora LiInO<sub>2</sub>:RE<sup>3+ </

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5

Pedroso, Cássio Cardoso Santos. "Investigação da luminescência persistente dos materiais Lu2O3:TR3+,M (TR,M: Pr,HfIV; Eu, Ca2+ ou Tb,Ca2+) preparados pelo método de estado-sólido assistido por micro-ondas." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-21062017-092436/.

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A luminescência persistente é um fenômeno em que o material emite radiação de segundos a várias horas após cessada a irradiação (luz, radiação UV, feixe de elétrons, etc.). No entanto, os mecanismos que geram o fenômeno da luminescência persistente ainda não são totalmente estabelecidos. Neste trabalho os materiais Lu2O3:TR3+,M (TR,M: Pr,HfIV; Eu, Ca2+ ou Tb,Ca2+) foram preparados pelo método de estado-sólido assistido por micro-ondas (MASS) e comparados com aqueles sintetizados pelo método cerâmico. As vantagens do método MASS incluem curto tempo de processamento, aquecimento dielétrico selet

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6

Queiroz, Thiago Branquinho de. "Estudos espectroscópicos de sistemas luminescentes hóspede/hospedeiro." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-04042013-112539/.

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Neste trabalho apresenta-se a obtenção e caracterização de materiais luminescentes baseados em matrizes mesoporosas incorporadas com espécies moleculares altamente emissivas; o corante rodamina 6G (R6G) e o complexo de irídio (III) (N,N-trans-[Ir-(1-benzil-4-(2,4-difluorofenil)-1,2,3-triazol)2(4,4´-dimetil-2,2´-bipiridina)]+). Na incorporação da R6G foram explorados xerogéis mesoporosos sílica de composições puramente inorgânica e modificada com grupos aromáticos, além de vidros mesoporosos sódio aluminosilicato. O complexo de Irídio (III) foi incorporado somente aos vidros sódio aluminosilica

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7

Lorenz, Tom. "Recycling Seltener Erden aus Permanentmagneten und Leuchtstoffabfällen mittels Feststoffchlorierung." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2018. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-237116.

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Die 17 Elemente der Seltenen Erden sind Bestandteil vieler Hochtechnologieprodukte, wie Elektromotoren, Spezialgläsern oder Katalysatoren, dennoch liegt die Recyclingrate aus End-of-Life-Produkten derzeit unter 1 %. Mit der Feststoffchlorierung wurde im Rahmen dieser Arbeit eine chemikalien- und kostensparende Methode für den Aufschluss Seltener Erden aus Leuchtstoff- und Magnetabfällen untersucht. Dabei wurden die gemahlenen Edukte mit NH4Cl vermischt und anschließend im Drehrohrofen erhitzt. Durch thermische Zersetzung des NH4Cl wird HCl- und NH3-Gas freigesetzt. Ersteres überführt die Selte

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8

Todd, Devin Marlin James. "The Mechanisms of Luminescence from ZnO Under Electron Irradiation." Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1341465661.

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9

BOMFIM, JUNIOR FRANCISCO A. "Producao e caracterizacao de vidros de oxidos de metais pesados dopados com terras-raras e nanoparticulas metalicas." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9433.

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Made available in DSpace on 2014-10-09T12:26:47Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:00:11Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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10

JAGOSICH, FABIO H. "Estudos dos processos de transferência de energia dos íons de Ersup(3+) e Hosup(3+) para os íons de Ndsup(3+), Tbsup(3+) e Eusup(3+) no cristal de LiYFsub(4) e no vidro ZBLAN para a otimização de meios laser ativos que operam na região de 3 microns." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11432.

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Made available in DSpace on 2014-10-09T12:51:51Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:06:32Z (GMT). No. of bitstreams: 0<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP<br>FAPESP:00/11446-0

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11

Bain, Fiona Mair. "Yb:tungstate waveguide lasers." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/1698.

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Lasers find a wide range of applications in many areas including photo-biology, photo-chemistry, materials processing, imaging and telecommunications. However, the practical use of such sources is often limited by the bulky nature of existing systems. By fabricating channel waveguides in solid-state laser-gain materials more compact laser systems can be designed and fabricated, providing user-friendly sources. Other advantages inherent in the use of waveguide gain media include the maintenance of high intensities over extended interaction lengths, reducing laser thresholds. This thesis present

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12

Magne, Sylvain. "Etat de l'art des lasers à fibre : étude d'un laser à fibre dopée ytterbium et spectroscopie laser de fibres dopées." Saint-Etienne, 1993. http://www.theses.fr/1993STET4027.

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Cette thèse montre l'intérêt de l'amplification optique et des lasers à fibres dopées par des ions de terres-rares pour l'instrumentation et les capteurs à fibres optiques. Nous détaillons les avantages et les inconvénients d'une telle technologie placée dans son contexte d'optique intégrée, ainsi que ses perspectives d'utilisation. Apres rappel de la théorie de la propagation guidée dans les fibres optiques, les technologies permettant de réaliser des fibres optiques dopées sont décrites. Une étude comparative des méthodes d'analyses de préformes et de fibres dopées permettant de déterminer l

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13

Posavec, Tony. "An Investigation into the Fluorescence of Polymers." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1499353221343727.

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14

VandenBerghe, Kenneth L. "Solid state luminescent materials : new and improved." Thesis, 1996. http://hdl.handle.net/1957/34187.

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15

Kumar, Ankit. "Development of Solid-State Derived Strontium Aluminate Based Luminescent Materials." Thesis, 2018. http://ethesis.nitrkl.ac.in/9460/1/2018_MR_AKumar_615CR1003_Development.pdf.

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This work focuses on the development of solid-state derived strontium aluminate (SrAl12O19) based luminescent materials. Strontium aluminate is considered as one of the phosphor host material and has been widely studied in many fields including luminescence. Now-a-days, strontium aluminate based phosphor materials got much attention due to its excellent applications for example luminescence paints, ceramic and polymer based warning signage as well as decorative materials in display LED light instruments. In this research work, non-rare earth (Mn, Cu) and rare earth (Ce) doped strontium alumi

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16

Mukherjee, Soham. "Local Structure-Property Relationship in Some Selected Solid State Materials." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3931.

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The thesis entitled “Local structure-property relationship in some selected Solid State Materials” mainly focuses on two fundamental topics: (a) evaluation of some standard global structural concepts in terms of local structure to provide a unique description of the crystal structure, and (b) the role of the crystal structure at different length-scales in controlling the properties in some selected materials.

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17

Mukherjee, Soham. "Local Structure-Property Relationship in Some Selected Solid State Materials." Thesis, 2015. http://etd.iisc.ernet.in/2005/3931.

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The thesis entitled “Local structure-property relationship in some selected Solid State Materials” mainly focuses on two fundamental topics: (a) evaluation of some standard global structural concepts in terms of local structure to provide a unique description of the crystal structure, and (b) the role of the crystal structure at different length-scales in controlling the properties in some selected materials.

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18

Mukherjee, Sanjoy. "Investigations of Structure-Property Relationships in NPI and BODIPY Based Luminescent Material." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3933.

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Luminescent materials find numerous applications in recent times and have enriched human lives in several different ways. From display and lighting technologies to security, sensing and biological investigations, luminescent organic compounds have become indispensible and often preferred over their inorganic counterparts. The versatility of organic materials arises from their comparative low costs, ease of fine-tuning, low toxicity and the possibility to develop flexible devices. Even until very recent times, the investigations and usage of organic luminescent materials were mostly limited to

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19

Mukherjee, Sanjoy. "Investigations of Structure-Property Relationships in NPI and BODIPY Based Luminescent Material." Thesis, 2015. http://etd.iisc.ernet.in/2005/3933.

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Luminescent materials find numerous applications in recent times and have enriched human lives in several different ways. From display and lighting technologies to security, sensing and biological investigations, luminescent organic compounds have become indispensible and often preferred over their inorganic counterparts. The versatility of organic materials arises from their comparative low costs, ease of fine-tuning, low toxicity and the possibility to develop flexible devices. Even until very recent times, the investigations and usage of organic luminescent materials were mostly limited to

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20

Schaffers, Kathleen I. "A study of new optical materials I. Crystal-chemical development of new optical frequency converters II. New hosts for Cr3+ luminescence and lasing." Thesis, 1992. http://hdl.handle.net/1957/32543.

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The emphasis of this work has been in two areas of optical materials - the crystal-chemical development of new optical frequency converters and the synthesis and study of new hosts for Cr�� luminescence and lasing. A simple method has been developed to identify promising frequency-doubling materials containing triangular oxoanions by estimation of nonlinear susceptibilities. Implementation of this method and its results have generated predictive capabilities in determining the relationships among crystal structure, nonlinear properties, and threshold powers. The new noncentrosymmetric borat

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