Letteratura scientifica selezionata sul tema "Electroluminescent composites"

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Consulta la lista di attuali articoli, libri, tesi, atti di convegni e altre fonti scientifiche attinenti al tema "Electroluminescent composites".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Articoli di riviste sul tema "Electroluminescent composites":

1

Feres, Flavio H., Lucas Fugikawa Santos e Giovani Gozzi. "Temperature and Electric Field Influence on the Electrical Properties of Light-Emitting Devices Comprising PEDOT:PSS/GPTMS/Zn2SIO4:Mn Composites". MRS Advances 3, n. 33 (2018): 1883–89. http://dx.doi.org/10.1557/adv.2018.179.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
ABSTRACTIn the present study, we analyze the influence of temperature and active layer thickness on the electrical properties of electroluminescent devices comprising a polymeric conductive blend (poly(3,4 ethylenedioxythiophene):polystyrene sulfonate, PEDOT:PSS), an inorganic electroluminescent material (manganese doped zinc orthosilicate, Zn2SiO4:Mn) and an organosilicon material (3-glicidoxypropyltrimethoxysilane, GPTMS), manufactured at different weight ratios of the component materials. The devices were obtained by depositing the active layer by drop-casting onto ITO-coated (RF-sputtering) glass substrates and thermally evaporating gold top electrodes in high vacuum. The results show that 90 wt% Zn2SiO4:Mn is required to observe high electroluminescence from the fabricated devices and that the optimum performance (turn-on voltage of 33 V, luminous efficacy of 24 cd/A and maximum luminance of almost 2000 cd/m2) was achieve for a (9.5/0.5/90) (GPTMS/PEDOT:PSS/Zn2SiO4:Mn) weight ratio. The device turn-on voltage found to be as proportional to the thickness of the active layer, indicating that the electroluminescence occurs by a field-effect mechanism. The temperature variation in the 100-300 K range allowed us to develop a theoretical model for the device operation, where the charge carrier transport in the active layer is well described by the variable range hopping model, with luminous efficacy nearby independent of the temperature.
2

Janczak, Daniel, Marcin Zych, Tomasz Raczyński, Łucja Dybowska-Sarapuk, Andrzej Pepłowski, Jakub Krzemiński, Aleksandra Sosna-Głębska, Katarzyna Znajdek, Maciej Sibiński e Małgorzata Jakubowska. "Stretchable and Washable Electroluminescent Display Screen-Printed on Textile". Nanomaterials 9, n. 9 (7 settembre 2019): 1276. http://dx.doi.org/10.3390/nano9091276.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Stretchable polymer composites are a new group of materials with a wide range of application possibilities in wearable electronics. The purpose of this study was to fabricate stretchable electroluminescent (EL) structures using developed polymer compositions, based on multiple different nanomaterials: luminophore nanopowders, dielectric, carbon nanotubes, and conductive platelets. The multi-layered EL structures have been printed directly on textiles using screen printing technology. During research, the appropriate rheological properties of the developed composite pastes, and their suitability for printed electronics, have been confirmed. The structure that has been created from the developed materials has been tested in terms of its mechanical strength and resistance to washing or ironing.
3

Jia, Yanmin, Xiangling Tian, Zheng Wu, Xiaojuan Tian, Jiayi Zhou, Yunzhang Fang e Chenchen Zhu. "Novel Mechano-Luminescent Sensors Based on Piezoelectric/Electroluminescent Composites". Sensors 11, n. 4 (1 aprile 2011): 3962–69. http://dx.doi.org/10.3390/s110403962.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Kaplan, Saveliy F., Nelli F. Kartenko, Dmitry A. Kurdyukov, Alexander V. Medvedev e Valery G. Golubev. "Electroluminescent three-dimensional photonic crystals based on opal–phosphor composites". Applied Physics Letters 86, n. 7 (2005): 071108. http://dx.doi.org/10.1063/1.1866223.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Lee, Jun-Young, e Jin-Ha Hwang. "Fabrication and Optical Properties of Inorganic Electroluminescent Devices". Journal of the Korean Ceramic Society 46, n. 3 (31 maggio 2009): 317–22. http://dx.doi.org/10.4191/kcers.2009.46.3.317.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Wang, Feifei, Yanmin Jia, Jun Wu, Xiangyong Zhao e Haosu Luo. "Piezoelectric/electroluminescent composites for low voltage input flat-panel display devices". Applied Physics A 90, n. 4 (29 novembre 2007): 729–31. http://dx.doi.org/10.1007/s00339-007-4343-8.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Stauffer, Flurin, e Klas Tybrandt. "Bright Stretchable Alternating Current Electroluminescent Displays Based on High Permittivity Composites". Advanced Materials 28, n. 33 (14 giugno 2016): 7200–7203. http://dx.doi.org/10.1002/adma.201602083.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Korusenko, Petr M., Olga V. Petrova e Alexander S. Vinogradov. "Atomic and Electronic Structure of Metal–Salen Complexes [M(Salen)], Their Polymers and Composites Based on Them with Carbon Nanostructures: Review of X-ray Spectroscopy Studies". Applied Sciences 14, n. 3 (30 gennaio 2024): 1178. http://dx.doi.org/10.3390/app14031178.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Currently, electrically conductive polymers based on transition metal complexes [M(Salen)], as well as their composites, are among the systems showing promise as catalysts, electrochromic and electroluminescent materials, and electrodes for energy storage (for batteries and supercapacitors). The current review focuses on elucidating the atomic and electronic structure of metal–salen complexes, their polymers, and composites with nanostructured carbon (carbon nanotubes and graphene) using modern X-ray spectroscopy methods (X-ray photoelectron (XPS) and valence-band photoemission (VB PES) spectroscopy, as well as near-edge (NEXAFS) and extended (EXAFS) X-ray absorption fine structure spectroscopy). We trust that this review will be of valuable assistance to researchers working in the field of synthesizing and characterizing metal–salen complexes and composites based on them.
9

Wu, Zheng, Xiangling Tian, Yanmin Jia, Xiaojuan Tian, A’xi Xie, Yihe Zhang e Haosu Luo. "Giant magneto-light output in three-phase magnetostrictive, piezoelectric, and electroluminescent composites". Applied Physics Letters 99, n. 21 (21 novembre 2011): 212503. http://dx.doi.org/10.1063/1.3663868.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Vannikov, A. V., A. D. Grishina, M. G. Tedoradze, V. A. Kolesnikov e M. A. Brusentseva. "Photochemical formation of the electroluminescent image in polymer–silica gel nanoparticle composites". Journal of Photochemistry and Photobiology A: Chemistry 142, n. 1 (agosto 2001): 67–72. http://dx.doi.org/10.1016/s1010-6030(01)00473-7.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri

Tesi sul tema "Electroluminescent composites":

1

Quadros, Matheus Henrique. "Fabricação e caracterização de dispositivos eletroluminescentes produzidos com compósitos /". Rio Claro, 2019. http://hdl.handle.net/11449/190904.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Orientador: Giovani Fornereto Gozzi
Resumo: Dispositivos Eletroluminescentes (EL) são comumente utilizados para iluminação ambiente e transmissão visual de informações, possuem uma enorme gama de aplicações em setores diversos, como para tratamento fototerápico e decoração. Entre as atuais tecnologias, os dispositivos produzidos com compósitos eletroluminescentes têm potencial de emprego em aplicações emergentes devido ao seu baixo custo, flexibilidade mecânica e escalabilidade. Estas vantagens tecnológicas estão atreladas ao fato destes dispositivos poderem ser produzidos utilizando-se técnicas de impressão gráfica, como por exemplo, a técnica de impressão serigráfica. Neste sentido, este trabalho tem como objetivo o desenvolvimento de dispositivos EL totalmente impressos utilizando a técnica de impressão serigráfica. Para tanto, a pasta condutora transparente (PCT) e a pasta de prata (PTF), ambas fornecidas pela empresa TICON, foram utilizadas para a produção de eletrodos transparentes e opacos, respectivamente. A camada ativa dos dispositivos foi produzida com o compósito eletroluminescente (PEL), o qual foi desenvolvido durante o presente estudo. Filmes dos materiais PCT, PEL e PTF foram depositados utilizando-se telas com diversas lineaturas e caracterizados com relação às suas propriedades morfológicas, elétricas e ópticas, com a finalidade de identificar as melhores lineaturas de telas serigráficas para o processamento de cada um dos materiais. Por fim, dispositivos EL do tipo LECEL (Light-Emitting Composite Ele... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Electroluminescent (EL) devices have a wide range of applications. Among current technologies, devices produced with electroluminescent composites have potential for use in emerging applications due to their low cost, flexibility and scalability. Scalability and cost-effectiveness are characteristics also related to device processing methods, amongst which printing techniques, such as screen-printing, are the most appropriated to achieve these goals. Therefore, this research regards on development of screen-printed EL devices. For this purpose, the transparent conductive paste (PCT) and the silver paste (PTF), both sourced by TICON, were used for transparent and opaque electrodes fabrication, respectively. The active layer of the devices have been produced with an electroluminescent composite (PEL) developed during the present study. We have produced screen-printed films with the PCT, PEL and PTF materials using screens with different mesh counts to study the influence of mesh count on the morphological, electrical and optical properties of the films. In addition, we have performed a study regarding the influence of mesh count on the EL device performance parameters. As main result, we have fabricated a screen-printed EL device, using screens with appropriated mesh counts for deposition of each material, which exhibited luminance of 50 cd/m2 (at 110 V) and turn-on voltage of (18 ± 2) V.
Mestre
2

Ng, Po-king. "Molecular and polymeric metal complexes for electroluminescence applications". Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20979435.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

伍寶琼 e Po-king Ng. "Molecular and polymeric metal complexes for electroluminescence applications". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B29866303.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Aubert, Eddy. "Diagnostic optique du vieillisement électrique des résines époxydes sous faible champ électrique". Toulouse 3, 2008. http://thesesups.ups-tlse.fr/340/.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Les résines époxydes sont employées depuis longtemps comme isolation des systèmes électriques. Elles sont généralement formulées avec une dispersion des micro-charges pour améliorer les propriétés thermiques et mécaniques. Toutefois, des problèmes demeurent quant à l'influence possible de ces charges sur le comportement électrique, particulièrement sur le vieillissement à long terme sous différentes contraintes. L'objectif de ce travail de thèse est de sonder l'activité électrique des défauts potentiels en analysant les signaux optiques sous contrainte alternative modérée (jusqu'à 9 kV). Des résines avec et sans charges ont été étudiées. L'obstacle majeur de ce travail a été d'améliorer la collection du signal lumineux, compte tenu du faible niveau de luminescence détectée, inhérent à l'utilisation de contraintes électriques faibles, les plus proches possibles des conditions de service. L'interprétation des différents phénomènes optiques se fonde sur l'analyse spectrale, l'imagerie de l'émission lumineuse dans le plan de l'échantillon et le comptage de photons. Deux comportements luminescents ont été observés, le premier montre une évolution régulière de la luminescence avec le champ électrique auquel l'échantillon est soumis, le deuxième montre des discontinuités dans cette même émission, accompagnées d'instabilités lumineuses que nous avons pues identifier comme étant dues à des micro-cavités non détectables par les appareils de mesure de DP. Des expérimentations ont été conduites pour connaître l'évolution de cette luminescence dans le cas des deux comportements lors du vieillissement sous différentes contraintes (électrique et hygrothermique). Peu de changements ont été observés
Epoxy resins are insulating materials widely used in electrical systems since a long time. They are made with micro-particles to improve the thermal and mechanical properties. However, problems remain regarding the possible influence of these charges on the electrical behaviour, particularly on them long-term aging under different stresses. The objective of this work is to probe the electrical activity of potential defects in analysing the optical signals under moderate alternative electrical stress (up to 9 kV). Resins with and without charges have been studied. The major obstacle of this work was to improve the collection of luminous signal, given the low level of luminescence detected, inherent to the use of low field, near the services conditions. The interpretation of the different phenomena is based on spectral analysis, imaging devices and the issue of counting photons. Two luminescent behaviours have been observed, the first shows an evolution of the luminescence with the electric field to which the sample is submitted, the second regular shows discontinuity in the same evolution with instability that we could identify as being due to non-detectable micro-cavity by DP measuring devices. Experiments were conducted to determine the evolution of this luminescence in the case of the two behaviours during ageing under different constraints (electric and humidity). Few changes were observed
5

Leopold, Diatezo. "Multifunctional materials for intelligent textile : Toward automotive applications". Electronic Thesis or Diss., Lyon, INSA, 2023. http://www.theses.fr/2023ISAL0114.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Ce projet de recherche de doctorant concerne l’élaboration et l’utilisation de matériaux multifonctionnels imprimable, en mettant l’accent sur les compromis entre propriétés matériaux et spécification applicative, avec un focus autour des fonctions de chauffage par effet joule et d’électroluminescence. L’originalité des travaux repose sur une approche couplée entre matériaux multifonctionnels et intégration textile. Le premier point de l’étude concerne la sélection des matériaux multifonctionnels jugés comme potentiellement intéressants pour la création de textiles intelligents adaptés aux secteurs cibles de la société TESCA-groupe. Cette sélection impliquait la caractérisation des propriétés électriques et thermiques des matériaux conducteurs ainsi que du substrat textile. De plus, des analyses à l'aide d'appareils de microscopie électronique à balayage (MEB)/ spectroscopie à dispersion d'énergie (EDS) et diffraction de rayon X (DRX) étaient effectuées pour étudier la microstructure, notamment l'adhérence, l'épaisseur des couches déposées et la composition chimique des matériaux. Le second aspect met l’accent sur une étude du vieillissement accéléré sur des éprouvettes unitaires des substrats textiles revêtus d'encre conductrice, en conformité avec les spécifications requises de la société Tesca. L'objectif de cette démarche était d'identifier les limites inhérentes à chaque matériau, telles que la déformation maximale, les variations de température, l'adhérence, la compatibilité des processus, etc., dans le but de proposer des axes d'optimisation ou de tenir compte de ces limitations lors de la conception des transducteurs intégrés sur substrat textile. Cette première étape nous permettait d'établir une base de matériaux multifonctionnels pouvant être utilisés pour des applications spécifiques, telles que les nappes chauffantes, les interrupteurs capacitifs ou résistifs, les transducteurs, les capteurs de grandeurs mécaniques, entre autres. Le troisième volet de cette recherche consistait à assembler ces éléments de base pour créer des sous-fonctions qualifiées d’intelligente. En effet, la réalisation de transducteurs impliquait généralement la combinaison de différents matériaux multifonctionnels afin de répondre aux exigences spécifiques de l'application visée
This PhD student research project concerns the development and use of printable multifunctional materials, focusing on the trade-offs between material properties and application specification, with a particular emphasis on joule heating and electroluminescence functions. The originality of the work lies in a coupled approach between multifunctional materials and textile integration. The first part of the study concerned the selection of multifunctional materials deemed potentially interesting for the creation of intelligent textiles adapted to TESCA-groupe's target sectors. This involved characterizing the electrical and thermal properties of both the conductive materials and the textile substrate. In addition, analyses using scanning electron microscopy (SEM)/energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) were carried out to study the microstructure, including adhesion, the thickness of the deposited layers and the chemical composition of the materials. The second aspect focused on an accelerated ageing study on unit specimens of textile substrates coated with conductive ink, in compliance with the specifications required by Tesca. The aim of this approach was to identify the inherent limitations of each material, such as maximum deformation, temperature variations, adhesion, process compatibility, etc., with a view to proposing areas for optimization or taking these limitations into account when designing transducers integrated on textile substrates. This first step enabled us to establish a base of multifunctional materials that could be used for specific applications, such as heating mats, capacitive or resistive switches, transducers, sensors for mechanical quantities, among others. The third aspect of this research consisted in assembling these basic elements to create sub-functions described as "intelligent". In fact, the production of transducers generally involved combining different multifunctional materials to meet the specific requirements of the target application
6

Colucci, Renan [UNESP]. "Desenvolvimento de um compósito contendo polímero condutor (PEDOT:PSS) e material ORMOSIL (GPTMS) com aplicação na fabricação de dispositivos eletroluminescentes". Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/141509.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Submitted by Renan Colucci null (37412942840) on 2016-07-12T19:19:53Z No. of bitstreams: 1 dissertação_RENAN_versãofinal.pdf: 3242692 bytes, checksum: c7bf17a6e3f70f7b97cb6c8ecfa1e065 (MD5)
Approved for entry into archive by Ana Paula Grisoto (grisotoana@reitoria.unesp.br) on 2016-07-15T16:29:02Z (GMT) No. of bitstreams: 1 colucci_r_me_rcla.pdf: 3242692 bytes, checksum: c7bf17a6e3f70f7b97cb6c8ecfa1e065 (MD5)
Made available in DSpace on 2016-07-15T16:29:02Z (GMT). No. of bitstreams: 1 colucci_r_me_rcla.pdf: 3242692 bytes, checksum: c7bf17a6e3f70f7b97cb6c8ecfa1e065 (MD5) Previous issue date: 2016-06-27
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Atualmente é possível fabricar dispositivos eletroluminescentes (EL) utilizando como material ativo uma dispersão de um pó eletroluminescente inorgânico em uma matriz polimérica condutora. Entretanto, esses materiais são quimicamente instáveis, o que impede a deposição de alguns materiais solúveis sobre eles, como por exemplo, eletrodos de tinta prata. Para solucionar este problema, desenvolvemos uma matriz condutora e quimicamente estável formada pelo polímero condutor poli(3,4-etileno dioxitiofeno):poliestireno sulfonado (PEDOT:PSS) e pelo material sílica-orgânico 3-glicidoxipropil trimetilsilano (GPTMS). Foram produzidos compósitos de PEDOT:PSS/GPTMS com diversas concentrações de PEDOT:PSS, com os quais foram produzidos filmes uniformes, insolúveis e com condutividade elétrica entre 2 S/cm e 400 S/cm. A dependência da condutividade elétrica destes materiais em função da temperatura e da concentração de PEDOT:PSS foi descrita pelo modelo de transporte de cargas variable range hopping (VRH-3D). Adicionando-se o material eletroluminescente (EL) inorgânico silicato de zinco dopado com manganês (Zn2SiO4:Mn) à matriz condutora de PEDOT:PSS/GPTMS foi obtido um compósito para a produção de dispositivos EL. Depositando-se este compósito EL sobre substratos de vidro contendo eletrodos transparentes de óxido de estanho e índio, foram obtidos dispositivos EL com tensão de operação de 30 V e eficiência luminosa de 1,3 cd/A. Além disso, a transmitância óptica e a resistência de folha de filmes do compósito condutor (PEDOT:PSS/GPTMS) foram avaliadas, demonstrando que este material apresenta propriedades compatíveis com a aplicação como eletrodo transparente. Por fim, foram produzidos dispositivos EL utilizando o compósito condutor PEDOT:PSS/GPTMS como eletrodos e o compósito EL PEDOT:PSS/GPTMS/ Zn2SiO4:Mn como material ativo. Com este experimento, foi demonstrada a possibilidade de fabricar dispositivos EL por rota líquida, onde o compósito PEDOT:PSS/GPTMS foi utilizado tanto para a fabricação dos eletrodos como para a produção do material ativo do dispositivo.
It is possible to fabricate light-emitting (LE) devices with LE composites as active material. These light-emitting composites are produced with a LE inorganic powder dispersed into a conducting polymer matrix. However, these composites are chemically unstable, limiting the deposition of soluble materials over it. To overcome this problem we developed a high-stability conductive matrix comprising the conductive polymer poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) and the organic-silicate 3-glycidyloxypropyl)trimethoxysilane (GPTMS). Composites PEDOT:PSS/GPTMS with diverse weight concentrations of PEDOT:PSS were produced and used to fabricate high-stability films with electrical conductivity from 2 S/cm up to 400 S/cm. The charge transport in these conductive composites were studied as function of the temperature, as well as of the PEDOT:PSS concentration, and described by the 3D variable range hopping model. A light-emitting composite was produced adding to this conductive composite the inorganic electroluminescent powder Mn-doped zinc silicate (Zn2SiO4:Mn). Light-emitting devices, with turn-on voltage of 30 V and luminous efficacy of 1.3 cd/A, were produced with a coating of the developed LE composite done over glass substrates containing indium tin oxide transparent electrodes. Additionally, the optical transmittance and sheet resistance of films produced with the conductive composite PEDOT:PSS/GPTMS were evaluated showing that this material is suitable to fabricate transparent electrodes. Finally, were produced light-emitting devices employing the conductive composite PEDOT:PSS/GPTMS as electrodes and the light-emitting composite PEDOT:PSS/GPTMS/ Zn2SiO4:Mn as active material. This experiment has shown the fabrication of solution-processed light-emitting devices using the composite PEDOT:PSS/GPTMS as transparent electrode and as component of the active material.
7

Jama, Mariel Grace. "Semiconductor composites for solid-state lighting". Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0207/document.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Phases organiques luminescentes qui sont incorporés dans une matrice inorganique conductrice est proposé dans cette étude pour la couche active d'une diode émettant de la lumière hybride. Dans ce composite, le colorant organique joue le rôle de site de recombinaison radiative de porteurs de charge qui sont injectées dans la matrice de transport ambipolaire inorganique. Comme l'un des combinaisons de matériaux de candidat, bicouche et des films minces composites de ZnSe et un complexe d'iridium rouge (Ir(BPA)) émetteur de lumière organique ont été préparé in situ par UHV technique d'évaporation thermique. Les alignements de bande d'énergie mesurée par spectroscopie de photoélectrons (PES) pour le ZnSe/Ir(BPA)et deux couches de ZnSe+Ir(BPA) révèlent que le composite HOMO et LUMO du colorant organique sont positionnées dans la largeur de bande interdite de ZnSe. Cette gamme offre les forces motrices énergiques nécessaires pour les transferts d'électrons et de trous de ZnSe à Ir(BPA). Par l'interprétation des données du PES,la composition chimique des interfaces ont également été déterminés. Le ZnSe/Ir(BPA) interface est réactive, même si elle est d'une pureté de matériaux de haute.Pendant ce temps, l'Ir (BPA)/ZnSe interface ne présente pas la pureté matériel. Ceci est représenté à la nature de ZnSe évaporation comme Zn particuliers et des fluxSE2, associée à des interactions chimiques avec le Ir(BPA) substrat. L'interface est,de ce fait, composé d'une multitude de phases, les phases de Se0, ZnSe rares, réduit Se et oxydé molécules de colorant, et de Zn qui sont intercalées atomes dans leIr(BPA) substrat. PES des composites ZnSe+Ir(BPA) révèle des tendances similaires à l'Ir(BPA)/ZnSe interface. A des émissions de lumière rouge surfaciques et intermittents fanées ont été observés à partir de dispositifs qui incorporent couches alternées séquences de ZnSe et Ir(BPA) pour la couche active
Luminescent organic phases that are embedded in a conductive inorganicmatrix is proposed in this study for the active layer of a hybrid light-emitting diode. Inthis composite, the organic dye acts as the radiative recombination site for chargecarriers that are injected into the inorganic ambipolar transporting matrix. As one ofthe candidate material combinations, bilayer and composite thin films of ZnSe and ared iridium complex (Ir(BPA)) organic light emitter were prepared in situ via UHVthermal evaporation technique. The energy band alignments measured byphotoelectron spectroscopy (PES) for the ZnSe/Ir(BPA) bilayer and ZnSe+Ir(BPA)composite reveal that the HOMO and LUMO of the organic dye are positioned in theZnSe bandgap. This lineup provides the required energetic driving forces for electronand hole transfers from ZnSe to Ir(BPA). By interpreting PES data, the chemicalcomposition of the interfaces were also determined. The ZnSe/Ir(BPA) interface isreactive even though it is of high material purity. Meanwhile, the Ir(BPA)/ZnSeinterface does not exhibit material purity. This is accounted to the nature of ZnSeevaporation as individual Zn and Se2 fluxes, coupled with chemical interactions withthe Ir(BPA) substrate. The interface is, thereby, composed of an abundance of Se0phases, sparse ZnSe phases, reduced Se and oxidized dye molecules, and Znatoms that are intercalated into the Ir(BPA) substrate. PES of the ZnSe+Ir(BPA)composites reveals similar trends to the Ir(BPA)/ZnSe interface. A faded areal andintermittent red light emissions were observed from devices that incorporatedalternating layer sequences of ZnSe and Ir(BPA) for the active layer
8

Gros-Jean, Mickaël. "Fabrication et caractérisation de structures nanocomposites silicium poreux/CdS". Université Joseph Fourier (Grenoble), 1999. http://www.theses.fr/1999GRE10186.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Ce travail est consacre a la fabrication et a la caracterisation de structures nanocomposites silicium poreux/cds. Une etude approfondie de la chimie des solutions contenant des ions cd + + et l'utilisation d'un precurseur de soufre tres reactif, la thioacetamide, ont permis de mettre au point un procede de depot de cds adapte au silicium poreux (faible ph et temperature ambiante). Ce procede de depot, appele depot sequentiel, utilise deux bains separes : un premier bain pour l'adsorption d'hydroxyde de cadmium et un deuxieme bain pour la transformation de cet hydroxyde de cadmium en cds. L'utilisation de techniques de caracterisation comme la spectrometrie auger, la spectrometrie rutherford, la spectrometrie d'electrons ou la diffraction des rayons x confirme qu'il se forme du cds dans les pores du silicium ce qui conduit par ailleurs a la compression de la structure poreuse. La spectrometrie d'electrons et la spectroscopie infrarouge revelent que le materiau poreux est oxyde par les bains de depot, ce qui est probablement a l'origine de la perte de ses proprietes de luminescence. La methylation prealable du squelette poreux avant depot de cds permet d'eviter cette oxydation. Les couches nanocomposites ainsi obtenues conservent leur propriete de photoluminescence et permettent d'obtenir des structures electroluminescentes pour des polarisations electriques d'environ 2 volts, avec cependant un rendement qui reste faible.
9

Provost, Marion. "Intégration de couches hybrides de base sol-gel dans les architectures de passivation de dispositifs OLED". Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAT056.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
L’application de la technologie OLED (diode électroluminescente organique) pour l’affichage est actuellement principalement portée par le marché des écrans de télévision et des smartphones. Les matériaux et les substrats utilisés permettent de produire des dispositifs légers, compacts, voire flexibles, possédant un excellent contraste image et une fréquence de rafraîchissement élevée. Les contraintes technologiques limitant l’industrialisation concernent la durée de vie des dispositifs. D’une part, les matériaux utilisés dans les structures OLEDs sont dégradés en présence d’eau et d’oxygène, il est donc essentiel de passiver le dispositif avec une structure de haute qualité barrière à l’atmosphère. D’autre part, il est nécessaire d’ajouter une protection mécanique en surface, sous forme de capot ou de protection monolithique, modulable en fonction de l’application visée. Ces travaux de thèse visent à développer une nouvelle conception de packaging, intégrant des nanocomposites organiques-inorganiques au sein de l’architecture d’encapsulation multicouche développée au CEA-LETI, et appliquée aux écrans de petite taille (microdisplays) OLED réalisés sur substrat silicium. Ces matériaux permettent de cumuler des propriétés d’ordinaire antagonistes ; celles de la phase organiques (flexible, déposable par voie liquide) et celles de la phase inorganique (barrière au gaz, résistance mécanique et chimique). Les résultats reposent sur le contrôle fin de la morphologie ; le procédé sol-gel a donc été choisi pour sa versatilité. Nous avons montré qu’il était possible de définir plusieurs formulations composites. L’une en particulier, basée sur des nanoparticules de silice intégrées dans une matrice polymère, s’est révélée compatible avec l’encapsulation monolithique des substrats OLED, permettant notamment la reprise de contact électrique. L’ajout de ce matériau au sein de l’architecture de passivation augmente la résistance barrière au gaz et, par extension, la durabilité des dispositifs en conditions climatiques sévères. Utilisé en tant que protection mécanique de surface, cette solution en couche mince n’atteint pas la résistance mécanique des capots de verre, mais permet malgré tout de protéger les substrats pendant toutes les phases de fabrication et de manipulation. L’avantage principal de cette solution packaging réside dans la diminution de l’épaisseur totale, augmentant le contraste en limitant fortement les pertes lumineuses, et ouvrant la porte aux substrats et dispositifs flexibles
Due of the ongoing growth of smartphones and TVs displays markets, the application of OLED (Organic Light Emitting Diode) technology for displays has become a major center of interest. The materials and substrates used in such architectures allow to develop lightweight, compact and even foldable displays, demonstrating an excellent image quality and fast refresh rates. Currently, the technological drawbacks restricting the exploitation on industrial scale mainly concern the lifespan of the devices. First, materials used in OLED architecture are highly sensitive to moisture and oxygen ingress and require a high barrier encapsulation. In addition, a specific protection needs to be included to secure the device from mechanical failures. As so various options from glass lids to flexible barriers are likely to be considered depending on the intended use. This work deals with the production of OLED microdisplays deposited on silicon substrates, and aims to develop an alternative packaging solution, based on organic-inorganic nanocomposite layers, both on top and embedded into the multi-barrier passivation architecture previously developed at the CEA-LETI. Synergistic properties can be obtained from composite materials, enhancing the advantages of both the organic (flexibility, processability) and inorganic phase (barrier properties, mechanical and chemical resistance). As a high control on the morphology in required, the sol-gel process was therefore selected for its versatility. Several composite materials were designed. One selected formulation, based on silica nanoparticles dispersed in a polymer matrix, proved to be fully compatible with the monolithic encapsulation of OLED circuits, including, among other properties, the recovery of the electrical bonding. Passivation architectures using the composite as interface layer showed improved barrier properties as well as an enhanced durability of devices stored in warm and damp environment. Obviously, a thin hard-coat layer does not equal a glass lid in terms of mechanical resistance, yet our formulation provided a sufficient protection during the overall process and handling of the displays. The main advantages of this alternative packaging rely on the reduced thickness, increasing the contrast by minimizing the loss of luminous efficacy through guided mode and offering the prospect of flexible substrate manufacturing
10

Liao, Chi Hung, e 廖啟宏. "Highly Efficient Organic Electroluminescent Devices Incorporating a Composite Hole Transport Layer". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/96491187261318640897.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
碩士
國立交通大學
應用化學系所
93
Carrier recombination as well as the balance of holes and electrons is considered to be one of the most important factors that determine the luminance efficiency of OLEDs. In this study, a novel composite hole transport layer (c-HTL) has been developed, which can efficiently control the hole mobility in order to improve hole-electron balance. Improvement in the hole/electron recombination was illustrated by the remarkably high luminance efficiency. Under 20 mA/cm2 current driven condition, the Alq3-based green device with c-HTL has achieved a luminance efficiency of 5.96 cd/A at 7.64 V, which is 1.7 times higher than that of the standard device. Furthermore, c-HTL has demonstrated even better performance in blue devices. The sky-blue OLED with c-HTL based on the DSA-Ph dopant in MADN host has achieved a luminance efficiency of 16.15 cd/A with a CIEx,y color coordinate of [0.15, 0.29] at 6.44 V (20 mA/cm2) without deteriorating on the color saturation. The deep-blue device with c-HTL based on the BD1 dopant in MADN host has achieved a luminance efficiency of 5.39 cd/A with a CIEx,y color coordinate of [0.14, 0.13] at 6.79 V (20 mA/cm2), which is approximately 2 time higher than that of the standard device.

Libri sul tema "Electroluminescent composites":

1

Zhu, Xingwen. ZnO bao mo zhi bei ji qi guang, dian xing neng yan jiu. 8a ed. Shanghai Shi: Shanghai da xue chu ban she, 2010.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Bhat, Anup, Kamal K. Kushwah, Meera Ramrakhiani e Sanjay J. Dhoble. Electroluminescence in Inorganic Semiconductors, Polymers and Their Composites. Elsevier Science & Technology, 2022.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri

Capitoli di libri sul tema "Electroluminescent composites":

1

Kim, Mun Ja, Sung Min Park, Tae Young Lee, Sang Hyun Park, Jin Young Kim e Ji Beom Yoo. "Characterization of Brightness of Electroluminescent Device Using Powder Phosphor Composite with ZnO or TiO2". In Advances in Science and Technology, 150–53. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908158-12-5.150.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Sundararajan, P. R., e Molla Rafiquel Islam. "Poly(vinyl alcohol)". In Polymer Data Handbook, 1116–29. Oxford University PressNew York, NY, 2009. http://dx.doi.org/10.1093/oso/9780195181012.003.0195.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Abstract Major Applications Paper and textile sizing, oxygen resistant films, adhesives, emulcifiers, colloid stabilizers, base/coatings for photographic films, food wrappings, desalination membranes, electroluminescent devices, and cement coatings, Gels and composites.
3

"Novel Lanthanide Polycomplexes for Electroluminescent Devices". In High-Performance Polymers for Engineering-Based Composites, 71–82. Apple Academic Press, 2015. http://dx.doi.org/10.1201/b19869-13.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Hardaker, Stephen S., Abhijit V. Jadhav, Anna D. Gudmundsdottir e Richard V. Gregory. "Polyaniline". In Polymer Data Handbook, 363–69. Oxford University PressNew York, NY, 2009. http://dx.doi.org/10.1093/oso/9780195181012.003.0058.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Abstract Major Applications Polyaniline is finding widespread use in novel organic electronic applications such as light emitting diodes (LED), electroluminescence, metallic corrosion resistance, organic rechargeable batteries, biological and environmental sensors, composite structures, textile structures for specialized applications or static dissipation, membrane gas-phase separation, actuators, EMI shielding, organic semiconductor devices for circuit applications, blends with insulative host polymers to impart a slight electrical conductivity, bioelectronic medical devices, and a variety of other applications where tunable conductivity in an organic polymer is desirable.

Atti di convegni sul tema "Electroluminescent composites":

1

Sarkas, Harry W., Charles D. Merritt e Zakya H. Kafafi. "Preparation, Optical Spectroscopy, and Fluorescence of Molecular Organic Composites for Light-Emitting Diodes". In Organic Thin Films for Photonic Applications. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/otfa.1995.md.35.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Electroluminescence from small organic molecules has been known for some time. Thirty years ago, Helfrich and Schneider reported blue-violet electroluminescence in anthracene with an external quantum efficiency as high as 8%.1 This quantum efficiency is much better than that for the best polymer-based light-emitting diode (LED) reported to date.2 In spite of the superior quantum efficiency of molecular-based electroluminescent devices, no major progress was achieved until fairly recently when Tang and VanSlyke reported the first low-voltage organic LED with an external quantum efficiency of 1% (number of photons per electron).3 The emitting layer in this device consists of a thin layer of the metal complex, tris (8-hydroxyquinolinato) aluminum (AlQ3). Later, Littman and Martie showed an enhancement in the electroluminescence quantum efficiency of AlQ3 by doping it with the highly fluorescent laser dyes, Coumarin 540, Coumarin 343, and DCM.4 The paper focuses on a new class of organic composites consisting of highly fluorescent guest molecules dispersed in AlQ3. The electronic and optical properties of organic nanostructures based on these materials are studied, as functions of the luminescent center concentration, via optical and fluorescence spectroscopies. Photoluminescence quantum yields are measured and used to probe the efficiency of energy transfer between host and guest molecules.
2

Choi, S. S., e M. A. Fiddy. "Z-scan Measurements of Porous Silicon Particles in a Colloidal Suspension". In Microphysics of Surfaces: Nanoscale Processing. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/msnp.1995.mthd7.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Since Canham's report that porous silicon (PS) exhibits efficient visible photoluminescence under UV illumination at room temperature [1], extensive investigations addressing porous silicon's pore formation, surface morphology, photo/electroluminescent mechanism(s), and applications are already well reviewed [2-5]. Although much debate still surrounds porous silicon in the aforementioned areas, the viability of porous silicon as an optoelectronic material (e.g. optical switch) is well realized [6]. Thus, the motivation for our efforts is to find a new viable optoelectronic medium, namely a colloidal suspension of porous silicon nanoparticles in some cases microparticles. Colloidal suspensions of gold and polymer composites, possibly due to quantum confinement effects, have yielded large third order nonlinearities of 10-5 to 10-8 esu [7].
3

Ching-Fuh Lin, Chun-Yu Lee, Wei-Bo Lu, Wei-Fang Su e Yuen Yung Hui. "Electroluminescence from nanoparticles/organic composites". In 7th IEEE International Conference on Nanotechnology. IEEE, 2007. http://dx.doi.org/10.1109/nano.2007.4601319.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Lee, Chun-Yu, Jing-Shun Huang e Ching-Fuh Lin. "White Light Electroluminescence from Zinc Oxide Nanowire Composites". In 2008 8th IEEE Conference on Nanotechnology (NANO). IEEE, 2008. http://dx.doi.org/10.1109/nano.2008.43.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Yuen Yung Hui, Chun-Yu Lee e Ching-Fuh Lin. "White light electroluminescence from europium oxide nanocrystal/organic composites". In 7th IEEE International Conference on Nanotechnology. IEEE, 2007. http://dx.doi.org/10.1109/nano.2007.4601320.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Yang, Yi, Jinman Huang, Shanhua Xue, Yuguang Ma, Shiyong Liu e Jiachong Shen. "Electroluminescence from doped ZnS nanocrystals/polymer composite systems". In Optical Science, Engineering and Instrumentation '97, a cura di Zakya H. Kafafi. SPIE, 1997. http://dx.doi.org/10.1117/12.279337.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Yazdchi, K., e M. Salehi. "On Viscoelasticity in CNT-Reinforced Polymer Composites". In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-37820.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
The nanocomposites exhibit high electrical conductivity, significant non-linear optical behavior and electroluminescence, while having substantially improved mechanical properties relative to the neat polymer. However, very limited attention has been paid to the viscoelastic behavior of nanotube reinforced polymer composites (NTRPCs). In this paper, the constitutive relation and linear viscoelastic behavior of NTRPC are studied using methods of micromechanics and nanomechanics. First, the effects of volume fraction, aspect ratio and orientation of carbon nanotubes (CNTs), on the overall elastic properties of NTRPC are obtained through a micromechanical technique based on Eshelby’s Equivalent Inclusion (EEI) and Mori-Tanaka (MT) method. Secondly, by incorporating the Dynamic Correspondence Principle (DCP), the elastic solution is extended to solve the related linear viscoelastic problem. The results of this study are in good agreement when compared with previous analytical and experimental data.
8

Jabbour, Ghassan E., Bernard Kippelen, Neal R. Armstrong e Nasser Peyghambarian. "Organic electroluminescent devices: aluminum alkali-halide composite cathode for enhanced device performance". In Optoelectronics '99 - Integrated Optoelectronic Devices, a cura di Bernard Kippelen. SPIE, 1999. http://dx.doi.org/10.1117/12.348413.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Lopez, Herman A., e Philippe M. Fauchet. "Room-temperature electroluminescence from erbium-doped porous silicon composites for infrared LED applications". In Symposium on Integrated Optoelectronics, a cura di Shibin Jiang. SPIE, 2000. http://dx.doi.org/10.1117/12.382845.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Yang, Su-Hua, Hung-Yu Lin, Chih-Chieh Ho e Jyun-Hao Guo. "Enhancement on electroluminescence of OLEDs with high transmittance and low resistance of NiO/ITO composite anode". In International Conference on Innovation, Communication and Engineering (ICICE 2023). Institution of Engineering and Technology, 2023. http://dx.doi.org/10.1049/icp.2024.0142.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri

Vai alla bibliografia