@article{WongDetertBrehmeretal.2005, author = {Wong, J. E. and Detert, H. and Brehmer, Ludwig and Schrader, Sigurd}, title = {Green light-emitting devices based on soluble oligo(phenylenevinylenes)}, issn = {0169-4332}, year = {2005}, abstract = {In this work, we report our investigations on the film-forming properties as well as the optical and electroluminescent characterisations of a series of lateral-substituted soluble oligo(phenylenevinylenes) of various conjugation length. Preliminary investigations show that these materials are potential candidates for use in organic light-emitting devices (OLEDs). Two types of OLEDs were fabricated: single layer (SL) and single heterostructure (SHS), with poly(p-phenylenevinylene) (PPV) as hole transporting layer. Our best results were obtained with single layer device emitting green light with a luminance of 0.18 cd m(-2) and 0.24 cd m(-2) at a driving voltage of 10 V. (c) 2004 Elsevier B.V. All rights reserved}, language = {en} } @book{StrehmelSchraderSeifert1999, author = {Strehmel, Bernd and Schrader, Sigurd and Seifert, H.}, title = {Applied fluorescence in chemistry, biology and medicine}, editor = {Rettig, W.}, publisher = {Springer}, address = {Berlin}, isbn = {3-540-64451-2}, pages = {XIX, 562 S. : Ill., graph. Darst}, year = {1999}, language = {en} } @article{StephanSchraderBrehmer2000, author = {Stephan, J{\"o}rg and Schrader, Sigurd and Brehmer, Ludwig}, title = {Monte Carlo simulations of charge transport in molecular solids : a modified Miller Abrahams type jump rate approach}, year = {2000}, 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} } @book{SmertenkoFenenkoBrehmeretal.2005, author = {Smertenko, P. and Fenenko, L. and Brehmer, Ludwig and Schrader, Sigurd}, title = {Differential approach to the study of integral characteristics in polymer films}, year = {2005}, abstract = {The differential approach is based on the determination of dimensionless differential slope, for instance, of current-voltage characteristics (IVC), I=f(V). This slope (a) is given by formula alpha=d(lgI)/d(lgV). With such definition the ranges of constancy of the a(V) dependency correspond to the part of IVC characterized by the power behaviour (I similar to V-alpha). The differential slope of alpha(V) dependency gamma = d(lg alpha)/dlgV determines the exponent behaviour of curve (I similar to exp {eV(y)/kT}). Processing by the differential approach of the investigated theoretical or experimental characteristics permits us to determine the peculiarity of charge flow mechanisms, temperature behaviour of conductivity, etc. The theoretical base and some applications of differential approach to the investigation of the current-voltage, temperature and degradation characteristics of the polyaniline and poly(p- phenilenevinilene) based structures have been shown. (c) 2005 Elsevier B.V. All rights reserved}, language = {en} } @article{SchuermannKochVollmeretal.2000, author = {Sch{\"u}rmann, H. and Koch, Norbert and Vollmer, A. and Schrader, Sigurd and Neumann, M.}, title = {Angle resolved ultraviolet photoelectron spectroscopy of oriented sexiphenyl layers}, year = {2000}, language = {en} } @article{SchuermannKochVollmeretal.1999, author = {Sch{\"u}rmann, H. and Koch, Norbert and Vollmer, A. and Schrader, Sigurd and Neumann, M.}, title = {Angle resolved ultraviolet photoelectron spectroscopy (ARUPS) of oriented sexiphenyl layers}, year = {1999}, language = {en} } @article{SchuermannKochImperiaetal.1999, author = {Sch{\"u}rmann, H. and Koch, Norbert and Imperia, Paolo and Schrader, Sigurd and Jandke, M. and Strohriegl, P. and Schulz, Burkhard and Leising, G. and Brehmer, Ludwig}, title = {Ultraviolet photoelectron spectroscopic study of heterocyclic model compounds for electroluminescent devices}, year = {1999}, language = {en} } @article{SchraderWortmannPrescheretal.1998, author = {Schrader, Sigurd and Wortmann, Hanna Rosalie and Prescher, Dietrich and Lukaszuk, K. and Otto, Andreas H.}, title = {Solvatochromy and electro-optical study of new fluorine-containing chromophores}, year = {1998}, language = {en} } @article{SchraderVismantsDietzeletal.1999, author = {Schrader, Sigurd and Vismants, Z. and Dietzel, Birgit and Flueraru, C. and Prescher, Dietrich and Reiche, J{\"u}rgen and Motschmann, H. and Brehmer, Ludwig}, title = {Linear and nonlinear optical properties of Langmuir-Blodgett multilayers from chromophore-containing maleic acid anhydride polymers}, year = {1999}, language = {en} }