Electroluminescent
Mostrando 1-12 de 23 artigos, teses e dissertações.
-
1. Tuning Emitting Color of Electroluminescent Devices Containing Tris(2-acyl-1,3-indandionate)aluminum(III) Complexes as Emitting Layers
In this study, a novel type of tris(2-acyl-1,3-indandione)-aluminum(III) coordination compounds of the general formula [Al(acind)3]H2O, where 2-acyl-1,3-indandione (acind), 2-acetyl-1,3-indandione (aind), 2-benzoyl-1,3-indandione (bind), and 4-methyl-2-benzoyl-1,3-indandione (mbind), were synthesized and characterized by elemental analysis (CHN), Fourier tra
J. Braz. Chem. Soc.. Publicado em: 12/08/2019
-
2. Eco-Friendly Luminescent Hybrid Materials Based on EuIII and LiI Co-Doped Chitosan
Biopolymer-based materials have been of particular interest as alternatives to synthetic polymers due to their low toxicity, biodegradability and biocompatibility. Among them, chitosan is one of the most studied ones and has recently been investigated for the application as solid state polymer electrolytes. Furthermore, it can serve as a host for luminescent
J. Braz. Chem. Soc.. Publicado em: 2015-12
-
3. Síntese e caracterização de misturas poliméricas condutoras para aplicação em membranas biodegradáveis e dispositivos eletroluminescentes / Synthesis and characterization of conducting polymeric blends for use in biodegradable membranes and electroluminescent devices
The electrical properties of some conducting polymers and their blends have contributed to the technological advancement in various areas such as medicine and microelectronics. Recently, photochemical synthesis and spinner techniques have been using to prepare polymeric blends with good conducting properties. In this study we report the preparation of conduc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/08/2012
-
4. 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
-
5. Preparação e caracterização de dispositivos eletroluminescentes de complexos de β-Dicetonatos de íons Tb3+, Eu3+, Gd3+ com ligantes macrocíclicos e fimes de UO22+ / Preparation and characterization of electroluminescent devices based on complexes of β-diketonates of Tb3+, Eu3+, Gd3+ ions with macrocyclic ligands and UO22+ films
Complexos contendo íons de terras raras são de grande interesse na fabricação de dispositivos eletroluminescentes como é o caso do diodo emissor de luz construído com compostos orgânicos (OLED). Esses dispositivos, utilizando íons de terras raras trivalentes (TR3+) como centros emissores, exibem alta luminescência com bandas espectrais extremamente
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/05/2010
-
6. Oligômeros e polímeros derivados do tiofeno: síntese e aplicações
In this review we summarize recent synthetic investigations about the preparation of oligothiophenes and polythiophenes, the most important π-conjugated organic materials for applications in electrochromic and electroluminescent devices. It is showed that many interesting and novel functionalized oligothiophenes have been synthesized by convenient coupling
Química Nova. Publicado em: 2010
-
7. 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
-
8. Preparação de compostos orgânicos aplicados a síntese eletroquímica de polímeros eletroluminescentes
The discussion presented in this masters degree dissertation resulted in a study about the development of synthesis routes for obtaining the following organic compounds: 4-(decyloxy)-2,5-bis(dibromomethyl)benzonitrile and 2,5-bis(dibromomethyl)-4-(pentyloxy)benzonitrile. The interest in produced such compounds is related to the preparation, by electrochemica
Publicado em: 2009
-
9. Study of organic light-emitting devices using rare earth and transition metals complexes. / Estudo de dispositivos orgânicos emissores de luz empregando complexos de terras raras e de metais de transição.
This work presents the study of the Rare Earth (RE) and Transition Metals (TM) complexes, as emissive layers of Organic Light-Emitting Devices (OLEDs) designed, built and electro-optically characterized. The thin films were thermally evaporated or spin-coated. This research started with the study of Europium complex changing its central ligand (CL), which sh
Publicado em: 2008
-
10. Síntese e caracterização de copolímeros randônicos poli[bis-(fenilenovinileno)-stat-(1,8-bis-(2,6-dioximetano-1,4-fenilenovinileno)-dioxioctano)-1,4-fenileno)] e aplicação em diodos emissores de luz orgânicos (OLEDs). / Syntesis and characterization of random copolymers poli[bis (phenylene-vinylene)-stat-(1,8-bis-(2,6-dioxymethane-1,4-phenylene-vinylene)-dioxyoctane)-1,4-phenylene)] and application in organic light emission diodes.
Com o intuito de melhorar a eficiência dos dispositivos emissores de luz poliméricos uma das técnicas utilizadas é o confinamento da conjugação, diminuindo as perdas de energia em sítios de extinção, como fins de cadeia, defeitos ou armadilhas. Além disso, o confinamento quântico permite o controle do comprimento de onda emissivo desses materiais.
Publicado em: 2008
-
11. Photo- and electroluminescent behavior of Eu3+ ions in blends with poly(vinyl-carbazole)
Foi sintetizado o complexo tris(tenoiltrifluoracetonato)(2,2'-bipiridina)európio(III), Eu(tta)3bipy, e suas características luminescentes foram avaliadas. A emissão de blendas deste complexo com poli(9-vinil carbazol) (PVK-Eu), variando a composição do Eu(tta)3bipy de 1% até 8% em massa (Eu(tta)3bipy/PVK, m/m), apresentou picos de fotoluminescência em
Journal of the Brazilian Chemical Society. Publicado em: 2007-04
-
12. Study of charge transport layers in polymer light emitting diodes. / Estudo de camadas transportadoras de cargas em diodos emissores de luz poliméricos.
In the present work, the study of the optical and electrical properties of polymeric electroluminescent devices known as Polymer Light-Emitting Diodes (PLEDs) and the development of Hole Transport Layers (HTLs) to promote an increase of the electrical efficiency of the devices was performed. PLEDs were constructed with structures like Anode/HTL/Electrolumine
Publicado em: 2007