Journal Article10.4028/WWW.SCIENTIFIC.NET/MSF.663-665.300
Efficient photoluminescence from thin films of polypyrrole
3
Abstract: A soluble polypyrrole without any substituent groups was obtained by controlling the oxidation level of polypyrrole in the presence of oxygen. Upon the exposure to the 325 nm ultraviolet excitation from a helium-cadmium laser, thin films of the non-substituted polypyrrole could give off strong photoluminescence with its peak at about 530 nm. To elucidate the origin of the recorded strong photoluminescence, we measured the absorption spectra of the polypyrrole thin films with ultraviolet-visible absorption spectroscopy and our data indicated the appropriately oxidized polypyrrole are free of polarons. With the help of the electronic structures calculated with Huckel tight-binding method, the intense photoluminescence is interpreted in terms of the direct electronic transitions from the conduction band to valence band of the conjugated polymer.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Electroluminescence of Naturally Oxidized Polypyrrole
TL;DR: In this paper, the electroluminescence of the naturally oxidized polypyrrole was recorded, with its peak located at about 480 nm, and a prototype of thin-film display panels were developed using the naturally-oxosed pyrrole as active medium.
Synthesis of PEDOT in a continuous microfluidic system
TL;DR: In this paper, a micro-channel device inside micro-droplets was used for the synthesis of polyethylenedioxytiophene (PEDOT) from its monomer by chemical oxidation polymerization.
Continuous microfluidic fabrication of polypyrrole nanoparticles
TL;DR: In this paper, polypyrrole (PPy) nanoparticles were synthesized successfully by oxidation polymerization in droplets by microfluidic system, the oxidizing agent ammonium persulfate was added at various molar ratios with respect to the monomer.
References
Strong photoluminescence from monosubstituted polyacetylenes containing biphenylyl chromophores
TL;DR: In this paper, a series of photoexcited poly(1−alkynes) (PAs) containing biphenylyl pendants was observed, and the density of states of the PAs was calculated using the extended-Huckel-tight-binding method.
50
Fractal Features of Growing Aggregates from Isotropic Melt of a Chiral Bent-Core Liquid Crystal
Yuan Ming Huang,Bao-gai Zhai +1 more
TL;DR: Fractal features of aggregates growing out of the isotropic melt of a chiral bent-core liquid crystal, 1,3-phenylene bis {4-[3-chloro-4-(3,7-dimethyl octyloxyl)] phenyliminomethyl} benzoate, were investigated with differential scanning calorimetry, polarizing optical microscopy, and computer-aided simulation.
28
Formation of micrometer-sized electrical contacts on light-emitting porous silicon films
TL;DR: In this article, the surface roughness of porous silicon (PS) films was quantitatively analyzed using scanning electron microscopy (SEM) micrographs and it was shown that the originally rough surfaces of PS films can be smoothed by the electrochemical deposition so that electrical contacts can be easily formed on PS films.
22
Photoluminescent properties and electronic structures of monosubstituted polyacetylenes: poly{n-[((4′-cyano-4-biphenylyl)oxy)carbonyl]-1-alkynes}
TL;DR: In this article, the authors investigated the electric field effect on the photoluminescence (PL) spectrum of polyacetylenes with biphenyl mesogens and cyano tails in their pendants.
13
Effect of Mortar-Pestle Grinding on Conductivity of Ferric Chloride Doped Polypyrrole
TL;DR: In this paper, the effects of the mortar-pestle grinding on the conductivity of ferric chloride doped conducting polymer polypyrrole, which had been synthesized by in situ polymerizing the monomer pyrrole in aqueous solutions in the presence of the oxidant iron (III) chloride.
7