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Transistors, ElectronicPolymers
PolyPolythiopheneMaking conjugated polymersP3HTSynthesisField-effect tranPolythiophenesMorphologyCopolymersSmall-moleculeBlendsSensorsDonorLuminescenceChemistryMobilityMolecular orbitalStructuresIntrinsicInteractionsMicrostructureMaterialsBulkAbsorptionPropertiesElectrodesEfficiencyCompoundsBlendStilleNanostructuresSiliconExhibitsSpinFilmsReactionCoherentChainJournalHigh
Poly9
  • Here our primary goal is to reach the better understanding of the impact of nanoscale morphology on charge separation and transport processes in regioregular poly(3-alkylthiophenes) (rr-P3ATs) and their derivatives and in organic photovoltaic blends. (cmu.edu)
  • A Generalized Packing Model for Bulk Crystalline Regioregular Poly(3-alkylthiophenes) with Extended Side Chains. (mpg.de)
  • Multiple Chain Packing and Phase Composition in Regioregular Poly(3-butylthiophene) Films. (mpg.de)
  • In this study, poly(3-hexylthiophene) (P3HT) material is selected as polymer and cadmium sulphide (CdS) as nanoparticles to produce a hybrid nanocomposite thin film through the process spin-coating method. (upsi.edu.my)
  • Thermal annealing-induced enhancement of the field-effect mobility of regioregular poly(3-hexylthiophene) films. (upsi.edu.my)
  • Using cyclic voltammetry and electrochemical impedance spectroscopy in a detail previously not shown, we furthermore investigate the gating mechanism of as-fabricated CVD-grown graphene FETs and compare it with IG gated FETs based on regioregular poly(3-hexylthiophene) (rr-P3HT). (aip.org)
  • Preliminary efforts to synthesize the related regioregular poly(3-hexylthiophene) all-conjugated diblock copolymer and use this material as the active layer in photovoltaic cells are discussed. (syr.edu)
  • We report the first synthesis of regioregular poly(3-hexylthiophene) with carboxylic end groups (P3HT-COOH), show its potential to anchor onto mesoporous TiO2 and show its application as a polymer sensitizer in a solid-state dye-sensitized solar cell. (uni-bayreuth.de)
  • First, we investigate how processing conditions such as solvent selection and drying rate can influence microstructure development in highly regioregular poly(3-hexylthiophene) (P3HT) films. (edu.sa)
Polythiophene4
  • 7-14 The ability of narrow polydispersity rrP3ATs synthesized in McCullough laboratory to form well-defined fibrillar structures enabled us to use GISAXS patterns to recognize another particularly important aspect of molecular and nanoscale organization of polythiophene-like polymers: their intrinsic molecular and nanoscale porosity. (cmu.edu)
  • We report magnetoresistance(MR)measurements for structures with micrometer-thick regioregular, polythiophene (rr-P3HT) polymer layers between two ferromagnetic contacts. (sri.com)
  • Regioregular polythiophene-based conductive copolymers with highly crystalline nanostructures are shown to hold considerable promise as the active layer in volatile organic compound (VOC) chemresistor sensors. (cdc.gov)
  • While the regioregular polythiophene polymer chain provides a charge conduction path, its chemical sensing selectivity and sensitivity can be altered either by incorporating a second polymer to form a block copolymer or by making a random copolymer of polythiophene with different alkyl side chains. (cdc.gov)
Making conjugated polymers1
  • Changes in both color and conductivity are induced by the same mechanism, twisting of the polymer backbone and disrupting conjugation, making conjugated polymers attractive as sensors that can provide a range of optical and electronic responses. (wikipedia.org)
P3HT1
  • The incorporation of COOH groups was done by a polymer analogous reaction on P3HT. (uni-bayreuth.de)
Synthesis2
  • The synthesis and optoelectronic functions of a germole-containing π-conjugated polymer prepared by the reaction of a lithiated polymer precursor are described. (nature.com)
  • Determining the maximum effective conjugation length requires the synthesis of regioregular PTs of defined length. (wikipedia.org)
Field-effect tran1
  • In this work, we have demonstrated how the intrinsic properties of a conjugated polymer can influence the electro-optical characteristics of photo sensitive organic field - effect transistors (Photo-OFETs). (fsm.edu.tr)
Polythiophenes3
  • Professor Beng Ong and his team at Xerox have developed a class of liquid crystalline regioregular polythiophenes, PQTs, that possess sufficient air stability to enable achievement of excellent TFT properties under ambient conditions. (printedelectronicsworld.com)
  • These high-performance polythiophenes will therefore help bring the long-standing concept of low-cost organic/polymer transistor circuits closer to commercial reality. (printedelectronicsworld.com)
  • The Carnegie Mellon team used block copolymers containing ICPs called regioregular polythiophenes (rr-P3HTs), which were initially described by McCullough in 1992. (nanowerk.com)
Morphology2
  • Currently we are focusing on understanding its impact on charge transport in conducting polymers, and on morphology and performance of polymer-based photovoltaics. (cmu.edu)
  • Effect of polymer morphology on electrochemical behavior of electrodes. (ac.ru)
Copolymers6
  • The copolymers were exposed to a variety of VOC vapors, and the electrical conductivity of these copolymers increased or decreased depending upon the polymer composition and the specific analytes. (cdc.gov)
  • To counter this brittleness, scientists chemically link ICPs with grease-like, elastic polymers to make block copolymers. (nanowerk.com)
  • Block copolymers that contain grease-like polymers are less effective electrical conductors than pure ICPs. (nanowerk.com)
  • As part of the current study, the Carnegie Mellon team tested four block copolymers, each with a different ratio of insulating elastic polymer to conducting polymer. (nanowerk.com)
  • But when the scientists pretreated the transistor's silicon dioxide platform with OTS-8 - a chemical that creates a grease-like coating - they found that transistors incorporating any of the four block copolymers conducted an electric charge with remarkable ease, even when the insulating polymer constituted more than half of the applied block copolymer. (nanowerk.com)
  • Block copolymers with up to 57 percent insulating polymer performed 10 times better on OTS-8-treated surfaces than they did on untreated surfaces, according to the investigators. (nanowerk.com)
Small-molecule2
  • Here, we show that in the highly ordered lamellar microstructure of a regioregular thiophene-based conjugated polymer, a small-molecule p-type dopant can be incorporated by solid state diffusion into the layers of solubilizing side chains without disrupting the conjugated layers. (cam.ac.uk)
  • The correlations that result delineate clear routes to enhance operational field effect mobility in polymer and small molecule organic semiconductors. (edu.sa)
Blends2
  • Transient EPR signals attributed to charge transfer (CT) states and separated polarons are smaller in the blends with C-PCPDTBT as compared to those with the silicon-bridged polymer. (uni-potsdam.de)
  • The strong triplet signal is not observed in blends containing the Si-bridged polymer, indicating efficient singlet exciton splitting and subsequent charge carrier separation at the Si-PCPDTBT/PCBM interface. (uni-potsdam.de)
Sensors1
Donor2
  • Ambipolar Charge Transport in Isoindigo-Based Donor-Acceptor Polymers. (mpg.de)
  • Advances to OPV performance have widely been contributed to the use of donor-acceptor (DA) polymers. (sigmaaldrich.com)
Luminescence1
  • Fluorene co-polymer luminescence: implications for molecular interactions. (colorado.edu)
Chemistry2
  • в журнале Polymer Chemistry , том 8, с. (pskgu.ru)
  • This paper was a pure computational chemistry project studying the photoexcited state of a common conjugated polymer used in organic photovoltaics. (patricktapping.com)
Mobility1
  • We attribute the steady increase of hole mobility with fluorine content to changes in polymer molecular ordering. (uni-potsdam.de)
Molecular orbital1
  • According to the theoretical calculations carried out by Lagowski and coworkers, the incorporation of heteroatoms into the main chain of π-conjugated polymers provides us the chance to alter the energy levels of the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO). (nature.com)
Structures2
  • Anionic porous polymers with tunable structures and catalytic properties. (mpg.de)
  • Developing novel materials and device architectures to further enhance the efficiency of polymer solar cells requires a fundamental understanding of the impact of chemical structures on photovoltaic properties. (uni-potsdam.de)
Intrinsic1
  • Hole spin transport through the polymer layer leads to a relative MR value in 300 mT fields of 0.3% at 300 K and increasing to 18% at 25 K. The inferred intrinsic spin lifetime and diffusion length are about 7 ms and 0.4𝜇m0.4 μm, respectively. (sri.com)
Interactions1
  • This aspect of organization is a direct consequence of constraints imposed on intermolecular packing of polymer chains by strong interactions between rigid polymer backbones and their polydispersity. (cmu.edu)
Microstructure1
  • The influence of molecular weight on the microstructure and thin film transistor characteristics of pBTTT polymers. (ucsb.edu)
Materials6
  • Although germole-containing π-conjugated materials are also attractive for many optoelectronic applications, within the knowledge of the authors, only one previous synthetic work has been reported by Tilley and coworkers in which germole-containing polymers were prepared by the nickel-mediated cross-coupling polymerization of germole-containing monomers prepared from zirconacycle intermediates. (nature.com)
  • Conjugated polymers have been widely studied as potential semiconductor materials for organic thin-film transistors (TFTs). (printedelectronicsworld.com)
  • Polymers are flexible materials that can be easily processed and are formed into a thin film by several methods such as spin-coating, dip-coating, film-casting, and printing. (upsi.edu.my)
  • Quinone-based ladder-type polymers as promising electrode materials for potassium-ion batteries. (ac.ru)
  • We offer a wide range of high-purity, high-performance p-type and n-type organic semiconductor materials and inks (including small molecules, polymers), organic conductors and dielectric materials, as well as building blocks for making new active materials used in OFETs. (sigmaaldrich.com)
  • We provide well-defined liquid crystal materials spanning nematic, cholesteric, smectic, and discotic phases, as well as liquid crystal polymers and mesogens to facilitate the design of ordered, smart, stimuli-responsive molecular systems. (sigmaaldrich.com)
Bulk1
  • Liang, Y. Y. & Yu, L. P. A new class of semiconducting polymers for bulk heterojunction solar cells with exceptionally high performance. (nature.com)
Absorption2
  • The absorption maximum and onset of the obtained polymer were observed at 465 and 535 nm, respectively, in the UV-vis spectrum, from which the optical band gap of the polymer was estimated to be 2.31 eV. (nature.com)
  • The chemical interaction of the dimethylgermole-containing π-conjugated polymer with fluoride was also examined in terms of the changes observed in the UV-vis absorption spectra. (nature.com)
Properties5
  • Silole-containing polymers have been prepared by Yamaguchi, Tamao, and their coworkers, and the excellent electron-transporting properties of these polymers were demonstrated in organic EL devices. (nature.com)
  • structure-transport properties relationships in semiconducting polymers and organic photovoltaics, and nanostructured polymer networks. (cmu.edu)
  • By chemically linking rr-P3HTs with other elastic polymers, McCullough's group has also produced conductive plastics with a range of physical properties that could suit different device applications. (nanowerk.com)
  • However, in conducting polymers, dopants tend to be randomly distributed within the conjugated polymer, and as a result the transport properties are strongly affected by the resulting structural and electronic disorder. (cam.ac.uk)
  • The properties of structured polymers and colloids constitute the research focus of the group of Prof. Dr. Retsch. (uni-bayreuth.de)
Electrodes2
  • Large magnetoresistance of thick polymer devices having La 0.67 Sr 0.33 MnO 3 electrodes. (sri.com)
  • Research Progress on Polymer Solar Cells Based on PEDOT:PSS Electrodes. (upsi.edu.my)
Efficiency2
  • High-efficiency inverted dithienogermole-thienopyrrolodione-based polymer solar cells. (nature.com)
  • Efficiency enhancement in low-bandgap polymer solar cells by processing with alkane dithiols. (nature.com)
Compounds1
  • The impact of the connectivity between the polymer blocks of these compounds was investigated. (syr.edu)
Blend1
  • This work indicates that ternary blend solar cells have the potential to surpass high-performance binary polymer solar cells after further device engineering and optimization. (nature.com)
Stille2
  • We compare this method to the commonly used Stille co-polymerization by preparing four thiophene -based co-polymers using both methods. (rsc.org)
  • Stannole-containing polymers have also been prepared by Staubitz and coworkers and independently by us by using highly tin‐selective Stille coupling reactions and by the transformation of organotitanium polymers, respectively. (nature.com)
Nanostructures1
  • Using the combination of AFM and Grazing Incidence Small Angle X-ray Scattering (GISAXS) we demonstrated that charge carrier mobilities in rr-P3ATs are dictated by the extent of organization of fibrillar nanostructures formed by π-stacking of polymer chains. (cmu.edu)
Silicon1
  • When they applied thin films of these different polymers to untreated silicon dioxide, they found the greater the overall amount of insulating polymer in the final film, the worse that film performed in conducting an electric charge. (nanowerk.com)
Exhibits1
  • In the photoluminescence spectrum, the obtained polymer exhibits green fluorescence with an emission maximum of 547 nm and a quantum yield of 0.04. (nature.com)
Spin1
  • The spin-lattice relaxation time of positive polarons in C-PCPDTBT at low temperature ( T = 80 K) is found to be more than two orders or magnitude longer than in the Si-bridged polymer derivative. (uni-potsdam.de)
Films1
  • The shape of the transient EPR spectra reveals that the triplet excitons are, in contrast to those formed in pristine polymer films, not generated by direct intersystem crossing but result from back electron transfer through CT state recombination. (uni-potsdam.de)
Reaction1
  • A regioregular organometallic polymer having 1,4-dilithio-1,3-butadiene and 9,9-dioctylfluorene-2,7-diyl units was generated by the reaction of a tellurophene-containing polymer having a number-average molecular weight ( M n ) and molecular weight distribution ( M w / M n ) of 5900 and 1.9, respectively, with n -butyllithium (2.4 equiv) at −78 to −60 °C for 3 h. (nature.com)
Coherent1
  • 2D coherent charge transport in highly ordered conducting polymers doped by solid state diffusion. (cam.ac.uk)
Chain1
  • The bipolaron moves as a unit along the polymer chain and is responsible for the macroscopically observed conductivity of the material. (wikipedia.org)
Journal1
High1
  • We use MALDI-TOF mass spectrometry to show that this new method produces high-quality, uniform polymers with narrow distributions of end-groups. (rsc.org)