Search results for "semiconducting polymers"

showing 3 items of 3 documents

From monolayer to multilayer N-channel polymeric field-effect transistors with precise conformational order

2012

Monolayer field-effect transistors based on a high-mobility n-type polymer are demonstrated. The accurate control of the long-range order by Langmuir-Schafer (LS) deposition yields dense polymer packing exhibiting good injection properties, relevant current on/off ratio and carrier mobility in a staggered configuration. Layer-by-layer LS film transistors of increasing thickness are fabricated and their performance compared to those of spin-coated films.

Electron mobilityMaterials scienceTransistors ElectronicPolymersNanotechnologyThiophenesNaphthalenesTransistorslaw.inventionlawMonolayerElectronicDeposition (phase transition)General Materials Sciencemonolayer field-effect transistorchemistry.chemical_classificationbusiness.industrysemiconducting polymersMechanical EngineeringTransistorTransistor monolayer polymers orderPolymercharge transportchemistrylayered materialsMechanics of MaterialsN channelOptoelectronicsField-effect transistorbusiness
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A Very Low Band Gap Diketopyrrolopyrrole-Porphyrin Conjugated Polymer

2017

International audience; A porphyrin-diketopyrrolopyrrole-containing polymer (poly(porphyrin-diketopyrrolopyrrole) (PPDPP)) shows impressive molar absorption coefficients from lambda=300 to 1000 nm. The photophysical and structural properties of PPDPP have been studied. With PPDPP as the electron donor and [ 6,6]phenyl C-71 butyric acid methyl ester (PC71BM) as the electron acceptor, the bulk heterojunction polymer solar cell showed overall power conversion efficiencies of 4.18 and 6.44% for as-cast and two-step annealing processed PPDPP: PC71BM (1: 2) active layers, respectively. These results are quite impressive for porphyrin-containing polymers, especially when directly included in the p…

Materials scienceBand gapbuilding-blockporphyrinoidsElectron donorthin-film transistors02 engineering and technologyConjugated system010402 general chemistryPhotochemistry[ CHIM ] Chemical Sciences01 natural sciencesPolymer solar cellheterojunction solar-cellschemistry.chemical_compound[CHIM]Chemical Sciencessmall-moleculepolymerschemistry.chemical_classificationsemiconducting polymerscharge transferGeneral ChemistryPolymerChromophoreElectron acceptorside-chains021001 nanoscience & nanotechnologyPorphyrinphotovoltaic properties0104 chemical sciencesphotodynamic therapychemistryorganic photovoltaics0210 nano-technologyabsorptionperformanceconjugationChemPlusChem
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Controlling the mode of operation of organic transistors through side chain engineering

2016

Electrolyte-gated organic transistors offer low bias operation facilitated by direct contact of the transistor channel with an electrolyte. Their operation mode is generally defined by the dimensionality of charge transport, where a field-effect transistor allows for electrostatic charge accumulation at the electrolyte/semiconductor interface, whereas an organic electrochemical transistor (OECT) facilitates penetration of ions into the bulk of the channel, considered a slow process, leading to volumetric doping and electronic transport. Conducting polymer OECTs allow for fast switching and high currents through incorporation of excess, hygroscopic ionic phases, but operate in depletion mode…

Materials scienceTransconductanceNanotechnologyHardware_PERFORMANCEANDRELIABILITY02 engineering and technologyElectrolyte010402 general chemistry01 natural scienceslaw.inventionelectrochemical transistorlawMD MultidisciplinaryHardware_INTEGRATEDCIRCUITSSide chainConductive polymerMultidisciplinarySubthreshold conductionbusiness.industrysemiconducting polymersTransistor021001 nanoscience & nanotechnologyequipment and supplies0104 chemical sciencesorganic electronicsSemiconductorPhysical SciencesOptoelectronics0210 nano-technologybusinessHardware_LOGICDESIGNOrganic electrochemical transistor
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