Light Emitting Polymer
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Electrical and optical numerical modeling of DP-PPV based polymer light emitting diode
Abstract In this paper, an in-depth study of the electrical and optical characteristics of Polymer Light Emitting Diodes ITO/PEDOT: PSS/DP-PPV derivatives/Al(Ca) is presented. Three polymer materials are considered; poly(2,3-diphenyl-5-(4-heptyloxy-4'-oxytrimethylenediphenyl)-phenylenevinylene) (P1), poly(2,3-diphenyl-5-[4-(4-pentylcyclohexyl)phenoxy]-propyl
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2018-06
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2. Low cost UV-Ozone reactor mounted for treatment of electrode anodes used in P-OLEDs devices
Abstract Low cost UV-Ozone reactor using a high pressure mercury vapor lamp of 80 watts without outer bulb showed good results for treatment of ITO films used as anode electrode in the assembly of P-OLED (polymer-organic light emitting diode) devices. This study revealed 20 minutes as effective treatment time and it was verified also that the effect of UV-Oz
Polímeros. Publicado em: 22/08/2016
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3. Improving the Electroluminescence of [Zn(salophen)(OH2)] in Polyfluorene-Based Light-Emitting Diode: The Role of Energy Transfer and Charge Recombination
Combining two or more different compounds with advantageous properties has been a useful and straightforward strategy in achieving a new class of materials with improved physical properties. This has been especially true for electronic polymers, whose optoelectronic properties can be completely tuned, and even improved, when mixed with other polymeric materi
J. Braz. Chem. Soc.. Publicado em: 2016-02
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4. Simulação da dinâmica do estado excitado em semicondutores orgânicos / Simulation of the excited state dynamics in organic semiconductors
In the present work, the Monte Carlo method and the direct numerical integration of the Master Equation were employed to simulate the excitation spectral diffusion process in light emitting polymeric systems. The methodology employed a competition among the internal intra-molecular relaxation, the inter-molecular incoherent energy transfer via Förster mecha
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/04/2012
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5. Estudo das propriedades elétricas de células eletroquímicas emissoras de luz de derivados de polifluoreno / Electric properties study of polymer light-emitting electrochemical cells based on polyfluorene derivatives
Polymer light emitting electrochemical cells, PLECs, are organic electronic devices that have attracted commercial interest because they operate at low voltage and exhibit high performance without the need of specific electrodes such as indium tin oxide (ITO), calcium and others. This feature provides low cost of fabrication and exible devices. The charge in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/11/2011
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6. Structure and dynamics of poly(9,9-dioctylfluoren-2,7-co-benzothiadiazole) (F8BT) and correlations with its electrical properties / Estrutura e dinâmica molecular do poly (9,9-dioctylfluoren-2,7-diyl-co-benzothiadiazole) (F8BT) e correlações com suas propriedades elétricas.
The PHD project has two main goals. The first one is specifically related to investigations on molecular dynamics, structural conformations and packing of polyfluorene-based polymers. For this purpose, Wide Angle X-Ray Diffraction (WAXD), Solid-State Nuclear Magnetic Resonance (NMR) and Dynamical-Mechanical Thermal Analysis (DMTA) are being used as the main
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/09/2011
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7. Propriedades optoeletrônicas de interfaces híbridas metal/semicondutor orgânico preparadas por deposição assistida por feixe de íons (IBAD) / Optoelectronic properties of interfaces hybrid metal / organic semiconductor prepared by ion beam assisted deposition (IBAD)
In this work, optoelectronic properties from organic light emitting devices (OLEDs), based on conjugated polymers with metallic cathode, which were deposited by ion beam assisted deposition technique (IBAD) were studied. The main objective of this work is to produce a hybrid non abrupt metal/polymer interface and to study its effects on electron injection. T
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/07/2011
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8. Montagem da técnica Photo-CELIV para obtenção de parâmetros de condução em filmes finos de polímeros eletrônicos / CELIV technique assembly for conduction parameters obtainment in electronic thin films polymers
A eletrônica orgânica, isto é, aquela baseada em compostos orgânicos principalmente por átomos de Carbono, Hidrogênio, Nitrogênio, etc., vem mostrado um notável desenvolvimento nos últimos anos, pois tem aberto novas aplicações e novos mercados na área da eletrônica. Displays flexíveis e de alta resolução feitos a partir de polímeros conjuga
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/05/2011
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9. Effect of different light curing methods on mechanical and physical properties of resin-cements polymerized through ceramic discs
OBJECTIVE: The aim of this study was to compare the polimerization ability of three different light-curing units (quartz tungsten halogen, light-emitting diodes and plasma arc) and their exposure modes (high-intensity and soft-start) by determination of microhardness, water sorption and solubility, and diametral tensile strength of 5 dual-curing resin cement
J. Appl. Oral Sci.. Publicado em: 01/07/2011
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10. Polyol-polyesther matrices containing phthalocyanine derivatives macrocilces / Derivados de ftalocianina em sistemas poliméricos poliéster-poliol
Phthalocyanines are planar macrocycles with the presence of a central metal ion, formed by bridges of nitrogen and substituent groups in the aromatic rings adjacents. A large number of (PI) electrons, molecular symmetry and the possibility to coordinate different metals in nitrogen central atoms allows the use of these compounds in optical devices, light emi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/05/2010
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11. Effect of different light-curing devices and aging procedures on composite knoop microhardness
The aim of this study was to evaluate the effect of light-curing devices (Halogen/HAL, Light Emitting Diodes/LED, Argon Laser/LAS and Plasma Arc/PAC) and aging procedures (Mechanical Cycling/MC, Thermal Cycling/TC, Storage/S, MC+TC and MC+TC+S) on the micro-hardness of bottom/B and top/T surfaces of 2-mm-high composite resin cylinders. The Knoop microhardnes
Brazilian Oral Research. Publicado em: 2009-12
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12. Light emitting copolymers containing groups fluorene and quinoline: preparation, characterization and assembly of leds. / Copolímeros emissores de luz contendo grupos fluoreno e quinolina: preparação, caracterização e montagem de LEDs.
Visando o crescente interesse em pesquisa de novos materiais para a fabricação de dispositivos eletrônicos a base de polímeros semicondutores, com elevado potencial para a fabricação de diodos emissores de luz poliméricos os (PLEDs - Polymer light-emitting diodes), este presente trabalho teve como objetivo a síntese de novos copolímeros através da
Publicado em: 2009