TY  - JOUR
A1  - Wüstneck, Rainer
A1  - Prescher, Dietrich
A1  - Katholy, Stefan
A1  - Knochenhauer, Gerald
A1  - Brehmer, Ludwig
T1  - Surface dilatational rheological study of the trans-cis isomerisation of copolymers with trifluoromethoxy substituted metacrylate monolayers
Y1  - 2000
SN  - 0927-7757
ER  - 
TY  - JOUR
A1  - Stiller, Burkhard
A1  - Karageorgiev, Peter
A1  - Perez, E.
A1  - Valez, M.
A1  - Reiche, Jürgen
A1  - Prescher, Dietrich
A1  - Dietzel, Birgit
A1  - Brehmer, Ludwig
T1  - Scanning kelvin microscopy as a tool for visualisation of optically induced molecular switching in azobenzene self assembling films
Y1  - 2000
SN  - 0142-2421
ER  - 
TY  - JOUR
A1  - Karageorgiev, Peter
A1  - Stiller, Burkhard
A1  - Prescher, Dietrich
A1  - Dietzel, Birgit
A1  - Schulz, Burkhard
A1  - Brehmer, Ludwig
T1  - Modification of the surface potential of azobenzene-containing langmuir-blodgett films in the near field of a scanning kelvin microscope tip by irradiation
Y1  - 2000
ER  - 
TY  - JOUR
A1  - Kaminorz, Yvette
A1  - Schulz, Burkhard
A1  - Brehmer, Ludwig
T1  - Optical and Electrical Properties of Substituted 2,5-Diphenyl-1,3,4-Oxadiazoles
N2  - 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).
Y1  - 2000
ER  - 
TY  - JOUR
A1  - Kaminorz, Yvette
A1  - Smela, Elisabeth
A1  - Johansson, Tomas
A1  - Brehmer, Ludwig
A1  - Andersson, Mats R.
A1  - Inganäs, Olle
T1  - Characteristics of polythiophene surface light emitting diodes
N2  - 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.
Y1  - 2000
ER  - 
TY  - JOUR
A1  - Stephan, Jörg
A1  - Liemant, Alfred
A1  - Albrecht, Fred
A1  - Brehmer, Ludwig
T1  - Interplay of polaronic and disorder effects on electronic charge transport
Y1  - 2000
ER  - 
TY  - JOUR
A1  - Stephan, Jörg
A1  - Schrader, Sigurd
A1  - Brehmer, Ludwig
T1  - Monte Carlo simulations of charge transport in molecular solids : a modified Miller Abrahams type jump rate approach
Y1  - 2000
ER  - 
TY  - JOUR
A1  - Stephan, Jörg
A1  - Brehmer, Ludwig
T1  - Dynamic Monte Carlo simulation of organic molecular beam deposition: influence of growth parameters on film morphology
Y1  - 2000
ER  -