Micrometer- and Nanometer-Sized Polymeric Light-Emitting Diodes

Granström, Magnus; Berggren, Magnus; Inganäs, Olle

doi:10.1126/science.267.5203.1479

Cited by 317 publications

(119 citation statements)

References 24 publications

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“…The optimized geometry coming from the quantum-chemistry program MOPAC was compared with XRD data of PEDOT/ClO 4 , which was electrochemically prepared in randomly distributed holes with well-defined diameters (0.1 lm pores) by a so-called geometrically restricted polymerization. [152] PEDOT/ClO 4 gave a 2h = 6.7, which suggests a spacing of 13.2 . The resulting optimized crystal that gave the closest fit with the experimental results was a 25 % doping level orthorhombic cell with the cell parameters a = 13.2 , b = 4.25 , and c = 14.25 , where the polymer is aligned along the c-axis.…”

Section: Molecular Structure Of Pedotmentioning

confidence: 96%

Electrochemistry of Poly(3,4‐alkylenedioxythiophene) Derivatives

Groenendaal¹,

et al. 2003

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An overview of the electrochemistry of poly(3,4‐alkylenedioxythiophene)s (PXDOTs) is presented. As a class of conducting and electroactive polymers that can exhibit high and quite stable conductivities, a high degree of optical transparency as a conductor, and the ability to be rapidly switched between conducting doped and insulating neutral states, PXDOTs have attracted attention across academia and industry. Numerous fundamental aspects are addressed here in detail, ranging from the electrochemical synthesis of PXDOTs, a variety of in‐situ characterization techniques, the broad array of properties accessible, and morphological aspects. Finally, two electrochemically‐driven applications, specifically electrochromism and chemical sensors of PXDOTs are discussed.

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Section: Molecular Structure Of Pedotmentioning

confidence: 96%

Electrochemistry of Poly(3,4‐alkylenedioxythiophene) Derivatives

Groenendaal¹,

et al. 2003

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“…as an electrode material in supercapacitors, a hole injection layer in organic light-emitting diodes and solar cells). [7][8][9][10] Recently, some potential biotechnological applications of this CP have also been proposed (e.g. as a biosensor for the detection of specific nucleotide sequences, 11 neurotransmitters 12 and amino acids, 13 a biocondenser with bactericide properties, 14,15 a bioactive substrate for cell adhesion and proliferation 16,17 ).…”

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confidence: 99%

A rational design for the selective detection of dopamine using conducting polymers

Fabregat

Casanovas

Redondo

et al. 2014

Phys. Chem. Chem. Phys.

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Poly(N-methylpyrrole) (PNMPy), poly(N-cyanoethylpyrrole) (PNCPy) and poly(3,4-ethylenedioxythiophene) (PEDOT) films have been prepared using both single and two polymerization steps for the selective determination of low concentrations of dopamine, ascorbic acid and uric acid in tertiary mixtures.Analysis of the sensitivity and resolution parameters derived from the electrochemical response of such films indicates that PEDOT is the most appropriate for the unambiguous detection of the three species.Indeed, the performance of PEDOT is practically independent of the presence of both gold nanoparticles at the surface of the film and interphases inside the film, even though these two factors are known to improve the electroactivity of conducting polymers. Quantum mechanical calculations on model complexes have been used to examine the intermolecular interaction involved in complexes formed by PEDOT chains and oxidized dopamine, ascorbic acid and uric acid. Results show that such complexes are mainly stabilized by C-HÁ Á ÁO interactions rather than by conventional hydrogen bonds.In order to improve the sensitivity of PEDOT through the formation of specific hydrogen bonds, a derivative bearing a hydroxymethyl group attached to the dioxane ring of each repeat unit has been designed. Poly(hydroxymethyl-3,4-ethylenedioxythiophene) (PHMeDOT) has been prepared and characterized by FTIR, UV-vis spectroscopy, cyclic voltammetry, scanning electron microscopy and atomic force microscopy. Finally, the performance of PHMeDOT and PEDOT for the selective detection of the species mentioned above has been compared.

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“…In these devices, radically different approaches have been used to reach the small size. In the first [28], the electroluminescent poly(thiophene) film is spin-coated on top of a patterned contact structure with circular contacts, Novel Polymer LED Designs Using Poly(thiophenes) / 427 100 nm in diameter, made from a porous microfiltration membrane. The pores are filled with another poly(thiophene) derivative, PEDOT (poly(3,4-ethylene-dioxythiophene)) [29,30] in its doped form before spin-coating with the luminescent polymer.…”

Section: Sub-wavelength Size Polymer Ledsmentioning

confidence: 99%

Novel polymer light-emitting diode designs using poly(thiophenes)

Granström

1997

Polym. Adv. Technol.

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During the past few years, a number of different types of polymer light‐emitting diodes (LEDs) have been developed by the author"s group in Linköping. Most of these are described in this overview of the activities in the area of polymer LEDs, and common to all of them is that they are based on poly(thiophene) derivatives. By the use of different substituents and combinations thereof, the whole visible spectrum is covered, even extending into the UV and near‐IR regions. Other examples of the novel diode designs are the polarized LED, sub‐wavelength size LEDs, voltage‐controlled colors and a white light‐emitting diode. © 1997 John Wiley & Sons, Ltd.

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Micrometer- and Nanometer-Sized Polymeric Light-Emitting Diodes

Cited by 317 publications

References 24 publications

Electrochemistry of Poly(3,4‐alkylenedioxythiophene) Derivatives

Electrochemistry of Poly(3,4‐alkylenedioxythiophene) Derivatives

A rational design for the selective detection of dopamine using conducting polymers

Novel polymer light-emitting diode designs using poly(thiophenes)

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