Oleds
Mostrando 1-12 de 34 artigos, teses e dissertações.
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1. Supramolecular Approach in Energy Conversion Devices
This review summarizes investigations carried out at the Laboratory of Photochemistry and Energy Conversion (LFCE) in the University of São Paulo dealing with design and characterization of ruthenium(II), rhenium(I) and iridium(III) polypyridine complexes with desired photochemical and photophysical properties in light of the development of optoelectronics
J. Braz. Chem. Soc.. Publicado em: 2020-11
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2. A Calix[4]arene-Functionalized Perylene Imide and Its Luminescence Properties
In this study, new perylene-derived molecules were synthesized as perylene-3,4,9,10-tetracarboxylic acid monoanhydride monopotassium carboxylate 1; N-(3-propanol)perylene-3,4,9,10-tetracarboxylic-3,4-(monoimide)anhydride-9,10-acid potassium carboxylate 2; 5,11,17,23-tetra(tert-butyl)-25,27-bis(3’-bromopropoxy)-26,28-(dihydroxy)calix[4]arene 3; 5,11,17,23-t
J. Braz. Chem. Soc.. Publicado em: 2020-11
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3. Improvement of power efficiency of hybrid white OLEDs based on p-i-n structures
ABSTRACT In this article, hybrid white organic light-emitting diodes (WOLEDs) under p-i-n structures have been investigated in terms of power efficiency. By using tris(8-hydroxy quinolinato) aluminum (Alq3) doped with 8-hydroxy-quinolinato lithium (Liq) as an n-type and WHI112 doped with molybdenum trioxide (MoO3) as a p-type, the typical device structure of
Matéria (Rio J.). Publicado em: 05/03/2018
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4. A importância do estado excitado 3MLCT de compostos de Ru(II), Re(I) e Ir(III) no desenvolvimento de fotossensores, oleds e fotorredução de CO2
The photochemistry and photophysics of coordination compounds have been extensively investigated not only because their structure, stability, reactivity dependence on the metal center oxidation state and the coordinated ligand; but also for their electronic transitions in a wide range of visible radiation. The knowledge of light absorption, excited state dea
Quím. Nova. Publicado em: 2017-02
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5. 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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6. A THEORETICAL EVALUATION OF ELECTROCONDUCTIVE PROPERTIES FOR [1,2,4]-TRIAZOLE 4N-SUBSTITUTED POLYMERS
In order to evaluate a set of electrical and optical properties by using time-dependent density functional theory (TD-DFT), at level of theory B3LYP/6-31G(d), the 4N-substituted [1,2,4]-Triazole (TAZ) oligomers and substituted derivatives were studied using cyano, amino, methyl and fluoro functional groups. Additionally, specific properties were theoretic
Quím. Nova. Publicado em: 2015-06
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7. Influência de diferentes solventes utilizados na deposição de filme de poli(9-vinilcarbazol) em dispositivos OLEDs
This work studies the influence of the film deposition process on light emission performance and on threshold voltage of OLEDs, with architecture glass/ITO/PEDOT:PSS/PVK/Alq3/Al. The commercial PVK was dissolved in different solvents such as: chloroform, tetrahydrofuran, 1,2,4-trichlorobenzene and trimethylpentane. OLEDs were characterized by current-voltage
Quím. Nova. Publicado em: 2014
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8. 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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9. THIN FILMS OF ORGANIC MOLECULAR SYSTEMS: STUDY OF INFLUENCE OF THE DEPOSITION METHODS ON OPTICAL AND ELECTRICAL PROPERTIES / FILMES FINOS DE SISTEMAS MOLECULARES ORGÂNICOS DOPADOS: ESTUDO DA INFLUÊNCIA DOS MÉTODOS DE DEPOSIÇÃO NAS PROPRIEDADES ÓPTICAS E ELÉTRICAS
Neste trabalho é apresentado um estudo da influência das técnicas de deposição de filmes finos nas propriedades físicas de dois sistemas moleculares orgânicos. O estudo foi realizado através da análise das características ópticas e elétricas de filmes finos e dispositivos OLEDs crescidos utilizando os sistemas orgânicos: (1) DCM2:Alq3 e (2) [Sm(
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/05/2011
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10. Spectroscopic evidence of photodegradation by ultraviolet exposure of tris(8-hydroxyquinoline) aluminum (Alq3) thin films
A degradação extrínseca de diodos orgânicos emissores de luz (OLEDs) permanece como uma questão crucial, especialmente no que se refere à degradação, devido à exposição à luz. Poucos estudos existem e faltam dados a respeito dos produtos de fotodegradação e respectivos mecanismos, responsáveis pela extinção da luminescência. Com o objetivo
Journal of the Brazilian Chemical Society. Publicado em: 2010-12
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11. ESTUDO DAS PROPRIEDADES ELETROLUMINESCENTES DE NOVOS COMPLEXOS TETRAKIS BETA-DICETONATOS DE EURÓPIO UTILIZADOS EM OLEDS / INVESTIGATION ON ELECTROLUMINESCENT PROPERTIES OF NOVEL TETRAKIS BETA-DIKETONATE COMPLEXES USED IN OLEDS
Rare-earth complexes present extremely sharp line emission making possible to use them in organic light-emitting devices (OLEDs) technology. This dissertation reports the study of three europium tetrakis beta-diketonate complexes: Li[Eu(dbm)(4)].(4)H(2)O, TMPip[Eu(dbm)(4)] and Morf[Eu(dbm)(4)]. UV-Vis absorption, photoluminescence (PL) and cyclic voltammetry
Publicado em: 2010
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12. Photoluminescence, photoabsorption and photoemission studies of hydrazone thin film used as hole transporting material in OLEDS
A fotoluminescência de filmes finos de 1-(3-metilfenil)-1,2,3,4-tetrahidroquinolina-6-carboxialdeído-1,1’-difenilhidrazona foi monitorada em função da irradiação com luz UV. A intensidade da emissão decresce exponencialmente com o tempo de exposição, sugerindo degradação das amostras. Com o objetivo de investigar os mecanismos de degradação e
Publicado em: 2010