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Träfflista för sökning "WFRF:(Berggren Magnus 1968 ) srt2:(2000-2004)"

Sökning: WFRF:(Berggren Magnus 1968 ) > (2000-2004)

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  • Berggren, Magnus, 1968-, et al. (författare)
  • Electronics turns over a new leaf
  • 2001
  • Ingår i: Physics world. - 0953-8585 .- 2058-7058. ; 14, s. 21-22
  • Tidskriftsartikel (refereegranskat)
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  • Chen, Miaoxiang, 1962-, et al. (författare)
  • 1 micron wavelength photo- and electroluminescence from a conjugated polymer
  • 2004
  • Ingår i: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 84:18, s. 3570-3572
  • Tidskriftsartikel (refereegranskat)abstract
    • We report photo- and electroluminescence from an alternating conjugated polymer consisting of fluorene units and low-band gap donor-acceptor-donor (D-A-D) units. The D-A-D segment includes two electron-donating thiophene rings combined with a thiadiazolo-quinoxaline unit, which is electron withdrawing to its nature. The resulting polymer is conjugated and has a band gap of 1.27 eV. The corresponding electro- and photoluminescence spectra both peak at approximately 1 mum. Light-emitting diodes, based on a single layer of the polymer, demonstrated external quantum efficiencies from 0.03% to 0.05%.
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  • Chen, Miaoxiang, 1962-, et al. (författare)
  • Electric current rectification by an all-organic electrochemical device
  • 2002
  • Ingår i: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 81, s. 2011-2013
  • Tidskriftsartikel (refereegranskat)abstract
    • An all-organic printed electrochemical rectifier is reported. The device is based on a patterned layer of poly(3,4-ethylenedioxythiophene) poly(styrene sulfonate) (PEDOT:PSS) that interfaces a patterned electrolyte top layer. Overlap between the electrolyte layer and the conducting polymer pattern results in the formation of two electrochemically active areas within the conducting polymer pattern. When bias voltage is applied across the conducting polymer pattern, the PEDOT in the negatively biased areas is reduced electrochemically, while the PEDOT in the positively biased area is further oxidized. Reducing PEDOT from its p-doped, pristine state to the neutral state results in a marked loss of electrical conductivity. Due to the unsymmetrical device geometry, the current through the device may be shut off for one polarity of applied bias voltage with an electrical current rectification ratio of 100 compared to the opposite polarity. The output characteristics of a corresponding half wave rectifier as well as those from a full wave bridge rectifier show stable performance at frequencies below 15 Hz.
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  • Resultat 1-10 av 14

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