@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{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{BreuStosselSchraderetal.2005, author = {Breu, J. and Stossel, P. and Schrader, Sigurd and Starukhin, A. and Finkenzeller, W. J. and Yersin, H.}, title = {Crystal structure of fac-Ir(ppy)(3) and emission properties under ambient conditions and at high pressure}, issn = {0897-4756}, year = {2005}, abstract = {Solution and refinement of the crystal structure of fac-Ir(ppy)(3) is severely hampered by systematic twinning and pseudo-symmetry.fac-Ir(ppy)(3) Crystallizes in the centrosymmetric space group P (3) over bar as has been deduced from single-crystal structure refinement and investigations of the second harmonic generation (SHG) of fac-Ir(ppy)(3) powder as compared to two standard materials. The topology of the molecular packing of fac-Ir(ppy)(3) is identical to the packing observed for [Ru(bpy)(3)](0), however, the site symmetry of all Ir(ppy)(3) molecules is necessarily lowered from D-3 to C-3. Packing motifs with intermolecular "pi-pi interactions" of T-shaped and "shifted pi stack" geometry are realized. The systematic twinning leads to the occurrence of crystalline domains with rigorously alternating chirality within the bulk of the domains but with homochiral fac-Ir(ppy)(3) contacts at the domain interfaces. These differences in packing motifs are displayed in the emission spectra and in the high-pressure-induced shifts of the emission. The emission maximum of the bulk material at 18 350 cm(-1) (545 nm) and of the domain interfaces at 19 700 cm-1 (507 nm) experience for p < 25 kbar and T = 295 K red shifts of Delta nu/Delta p = -(12 +/- 2) cm(-1)/kbar, and -(22 +/- 4) cm(- 1)/kbar, 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{SchraderSchuermannKochetal.1999, author = {Schrader, Sigurd and Sch{\"u}rmann, H. and Koch, Norbert and Prescher, Dietrich}, title = {Electronic structure of new donor acceptor substituted chromophores}, year = {1999}, language = {en} } @article{SchraderPrescher1995, author = {Schrader, Sigurd and Prescher, Dietrich}, title = {Fluorine-containing chromophores with special nonlinear optical properties}, year = {1995}, language = {en} } @article{OttoSchraderSteigeretal.1997, author = {Otto, Andreas H. and Schrader, Sigurd and Steiger, Th. and Schneider, M.}, title = {Gas phase deprotonation energies of Sulfuric Acid, Perchloric Acid, Chlorsulfuric Acid and Fluorosulfuric Acid}, year = {1997}, language = {en} } @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} } @article{OttoSteigerSchrader1998, author = {Otto, Andreas H. and Steiger, Th. and Schrader, Sigurd}, title = {HAICI4 in the gas phase is stronger than HTaF6.}, year = {1998}, language = {en} } @article{MoellerSchraderMotschmannetal.2000, author = {M{\"o}ller, Gunter Eric and Schrader, Sigurd and Motschmann, H. and Prescher, Dietrich}, title = {Influence of a base electrolyte on the adsorption behavior of an anionic surfactant as observed by second harmonic generation}, year = {2000}, language = {en} }