@article{KaminorzSmelaJohanssonetal.2000,
  author    = {Kaminorz, Yvette and Smela, Elisabeth and Johansson, Tomas and Brehmer, Ludwig and Andersson, Mats R. and Ingan{\"a}s, Olle},
  title     = {Characteristics of polythiophene surface light emitting diodes},
  year      = {2000},
  abstract  = {Surface light emitting diodes SLEDs , in which previously microfabricated electrodes were coated with a conjugated polymer, were made with greatly different electrode spacings 250 nm and 10 or 20 mm and with different electrode material combinations. The fabrication process allowed us to compare several electrode materials. The SLED structures also enabled imaging of the light emission zone with fluorescence video microscopy. Conventional sandwich structures were also made for comparison electrode separation 50 nm. In this study, the emitting layer was poly[3- (2',5'-bis(1'',4'',7''trioxaoctyl)phenyl)-2,2'-bithiophene] (EO-PT), a conjugated polymer based on polythiophene with oligo ethyleneoxide side chains. The current-voltage (I(V)) and light-voltage (L(V)) characteristics of the SLEDs were largely insensitive to electrode separation except at high voltages, at which the current in the devices with the largest separations was limited. Sandwich structures had the same light output at a given current. Light could be obtained in forward and reverse bias from indium tin oxide ITO -aluminum, gold silicide-aluminum, and gold silicide-gold SLEDs, but the turn-on voltages were lowest with the ITO-aluminum devices, and these were also the brightest and most reliable. Adding salt to the EO-PT increased the current and brightness, decreased the turn-on voltages, and made the I(V) characteristics symmetric; thus, a device with an electrode separation of 10 mm had the extraordinarily low turn-on voltage of 6 V. The location of the light emission was at the electron-injecting contact.},
  language  = {en}
}
@article{WuestneckPrescherKatholyetal.2000,
  author    = {W{\"u}stneck, Rainer and Prescher, Dietrich and Katholy, Stefan and Knochenhauer, Gerald and Brehmer, Ludwig},
  title     = {Surface dilatational rheological study of the trans-cis isomerisation of copolymers with trifluoromethoxy substituted metacrylate monolayers},
  issn      = {0927-7757},
  year      = {2000},
  language  = {en}
}
@article{KaminorzSchulzBrehmer2000,
  author    = {Kaminorz, Yvette and Schulz, Burkhard and Brehmer, Ludwig},
  title     = {Optical and Electrical Properties of Substituted 2,5-Diphenyl-1,3,4-Oxadiazoles},
  year      = {2000},
  abstract  = {New substituted 2,5-diphenyl-1,3,4-oxadiazoles are reported as luminescent materials in light emitting diodes LEDs . The investigated new oxadiazoles show efficient blue and green emission in single layer devices. The combination with a hole transporting and red emitting polythiophene led to a white emission with higher quantum efficiency (QE).},
  language  = {en}
}
@article{KarageorgievStillerPrescheretal.2000,
  author    = {Karageorgiev, Peter and Stiller, Burkhard and Prescher, Dietrich and Dietzel, Birgit and Schulz, Burkhard and Brehmer, Ludwig},
  title     = {Modification of the surface potential of azobenzene-containing langmuir-blodgett films in the near field of a scanning kelvin microscope tip by irradiation},
  year      = {2000},
  language  = {en}
}
@article{StillerKarageorgievPerezetal.2000,
  author    = {Stiller, Burkhard and Karageorgiev, Peter and Perez, E. and Valez, M. and Reiche, J{\"u}rgen and Prescher, Dietrich and Dietzel, Birgit and Brehmer, Ludwig},
  title     = {Scanning kelvin microscopy as a tool for visualisation of optically induced molecular switching in azobenzene self assembling films},
  issn      = {0142-2421},
  year      = {2000},
  language  = {en}
}
@article{StillerKarageorgievBuchsteineretal.2003,
  author    = {Stiller, Burkhard and Karageorgiev, Peter and Buchsteiner, Andrea and Geue, Thomas and Henneberg, Oliver and Brehmer, Ludwig and Natansohn, Almeria and Hollricher, Olga},
  title     = {Using light as a tool : optically Induced mass transport generated in Near-Fields},
  issn      = {0038-7355 -},
  year      = {2003},
  language  = {en}
}
@article{BochenkovKarageorgievBrehmeretal.2004,
  author    = {Bochenkov, V. and Karageorgiev, Peter and Brehmer, Ludwig and Sergeev, G. B.},
  title     = {Quenched growth of nanostructured lead thin films on insulating substrates},
  issn      = {0040-6090},
  year      = {2004},
  abstract  = {Lead island films were obtained via vacuum vapor deposition on glass and ceramic substrates at 80 K. Electrical conductance was measured during vapor condensation and further annealing of the film up to room temperature. The resistance behavior during film formation and atomic force microscopy of annealed films were used as information sources about their structure. A model for the quenched growth, based on ballistic aggregation theory, was proposed. The nanostructure, responsible for chemiresistive properties of thin lead films and the mechanism of sensor response are discussed. (C) 2003 Elsevier B.V. All rights reserved},
  language  = {en}
}
@article{WangNespurekRakusanetal.2004,
  author    = {Wang, G. and Nespurek, S. and Rakusan, J. and Karaskova, M. and Schauer, F. and Brehmer, Ludwig},
  title     = {Polarized electrolumineseence from bilayer structures},
  issn      = {1022-1360},
  year      = {2004},
  abstract  = {The photoalignment ability of poly[methyl(phenyl)silylene] (PMPSi) films makes it possible to use them as hole- transporting substrates for the preparation of organic oriented films. A PMPSi layer prepared by spin coating was irradiated, after drying, with linearly polarized UV light. Then, water-soluble hydroxyaluminium phthalocyaninesulfonate [Al(OH)Pc(SO3Na)(1-2)] was deposited by casting. The cell ITO/PMPSi/AI(OH)Pc(SO3Na)(1-2)/Al showed non-linear current- voltage characteristics. For applied voltages higher than 10 V, polarized electroluminescence was observed. Its spectral characteristic consisted of two peaks with maxima at about 320 and 700 nm; their polarized anisotropies R-EL = Phi(parallel to) / Phi(perpendicular to) were ca. 15 and 0.5, respectively},
  language  = {en}
}
@article{SmertenkoDimitrievSchraderetal.2004,
  author    = {Smertenko, P. S. and Dimitriev, O. P. and Schrader, Sigurd and Brehmer, Ludwig},
  title     = {Doping of polyaniline by transition metal salts : current-voltage characteristics of the ITO/polymer film/metal heterostructures},
  issn      = {0379-6779},
  year      = {2004},
  abstract  = {Films of emeraldine base of polyaniline (PAni) doped by various transition metal salts have been prepared, and current-voltage characteristics of the indium-tin oxide (ITO)/PAni film/metal electrode heterostructures were investigated. It was found that the electrical characteristics of the heterostructures are greatly affected by the dopant used and the metal electrode used. Different dopants resulted in different current anomalies with asymmetric current-voltage characteristics. Depending on the dopant used, the exponential and power law of the current behavior can be distinguished. Depending on the metal electrode used, two different regimes of current passing have been found at low applied voltages, namely, a nearly ohmic regime for the indium electrode, and a diode regime for the aluminum electrode. The diode regime was found to accompany by a positive charge accumulation in the film near the film/metal interface, which creates a built-in potential in the film. The amount of positive charges accumulated at the interface and therefore the value of the built-in potential can be reversibly increased or reduced by successive runs of the applied voltage in the forward or reverse direction, respectively. (C) 2004 Elsevier B.V. All rights reserved},
  language  = {en}
}
@article{JaroszQuinnStephanetal.2005,
  author    = {Jarosz, Grazyna and Quinn, P. D. and Stephan, Niels and Brehmer, Ludwig},
  title     = {Dielectric properties of zinc phthalocyanine thin films : effects of annealing in air and in N-2},
  issn      = {0040-6090},
  year      = {2005},
  abstract  = {This work presents the effects of ambient conditions, in particular oxygen and humidity, on the dielectric spectra of thin zinc phthalocyanine (ZnPc) films equipped with interdigitated electrodes and the effect of annealing in dry N-2 or in ambient air. The measurements were performed in the frequency range 10(-2)-10(5) Hz. The results indicate that the electric properties of ZnPc films are not only affected by oxygen but also by water vapour the presence of which always leads to the drop in alternating current conductance (ac-conductance). Moreover, at room temperature, the ac-conductance of ZnPc films previously exposed to air exhibits a reversible change with humidity, which makes these films attractive for humidity sensing applications. (C) 2004 Elsevier B.V. All rights reserved},
  language  = {en}
}