Prof. Marlus Koehler

Departamento de Fisica, Universidade Federal do Parana,
Caixa Postal 19044, 81531-990, Curitiba PR, Brazil.
e-mail: koehler@fisica.ufpr.br

RESEARCH INTERESTS

 

·         Theoretical aspects of charge injection and transport in organic semiconductors.

·         Charge transport in nanocomposites of carbon nanotubes and conjugated polymers.

·         Electrical properties modelling of devices based on organic semiconductors

 

PREVIOUS TRAINING

D. Sc. in Physics, Departamento de Física, Universidade Federal de Santa Catarina, Florianópolis, Brazil.

 

M. Sc. in Physics, Departamento de Física, Universidade Federal do Paraná, Curitiba, Brazil.

 

 

Post-doctorate

Nonlinear Optics Laboratory, Swiss Federal Institute of Technology (ETHZ).

 

RECENT PUBLICATIONS

·         Seidel, K. F.; Koehler, M.. (2008) Modified Lampert triangle in an organic field effect transistor with traps. Physical Review B 78, 235308.

 

·         Koehler, M. ; Biaggio, I. ; Luz, M. G. E.. (2008) Resolving the contact voltage dilemma in organic field effect transistors. Physical Review B 78, 153312.

 

·         Koehler, M. ; Canestraro, C. D. ; Schinitzler, M. C. ; Oliveira, M. M. ; Zarbin, A. J. G. ; L.S. Roman ; Luz, M. G. E.. (2007) Evidence of fractal structure for charge transport in carbon-nanotube/conjugated-polymer composites. Europhysics Letters 79, 47011.

 

·         Leguenza E. L ; Patyk R. L.; Mello R. M. Q.; Micaroni L.; Koehler M.; Hümmelgen I. A.. (2007) High open-circuit voltage single-layer polybithiophene-based photovoltaic devices, Journal of Solid State Electrochemistry 11, 580.

 

·         Koehler M., Santos M. C., da Luz M. G. E.. (2006) Positional disorder enhancement of exciton dissociation at donor/acceptor interface, Journal of Applied Physics 99, 053702.

 

·         Nodari F. M., Koehler M., da Luz M. G. E., Roman, L. S.. (2005) Electrical aspects of photovoltaic devices based on bi-layer organic semiconducting materials, Microelectronics Journal 36, 995.

 

·         Koehler M. and Biaggio I. (2004) Space-charge and trap-filling effects in organic thin film field-effect transistors, Physical Review B 70, 045314.

 

·         Koehler M., Roman L. S., Inganas O., da Luz M. G. E. (2004) Modeling bilayer polymer/fullerene photovoltaic devices, Journal of Applied Physics 96, 40.

 

·         Trapponnier A, Biaggio I., Koehler M., and Günter P.. (2003) Integrated Pulsed photoconductivity of organic light emitting diodes. Applied Physics. Letters 83, 5473.

 

·         Koehler M. and Biaggio, I.. (2003) Influence of diffusion, trapping, and state filling on charge injection and transport in organic insulators, Physical Review B 68, 075205.

 

·         Koehler M., Roman L. S., Inganäs O., and da Luz MGE.. (2002) Space-charge-limited bipolar currents in polymer/C60 diodes, Journal of Applied Physics 92, 5575.

 

·         Kiy M., Biaggio I., Koehler M., and Günter P.. (2002) Conditions for ohmic electron injection at the Mg/Alq3 interface , Applied Physics Letters 80, 4366.

 

·         Kiy M., Losio P., Biaggio I., Koehler M., Trapponnier A. and Günter P.. (2002) Observation of the Mott-Gurney law in Alq3 films, Applied Physics Letters 80, 1198.

 

·         Koehler, M., da Luz, MGE. and Hümmelgen, IA.. (2001) Eletrical Characteristics in Unipolar Conjugated Polymer Devices: the case of modified transport properties in the neighborhood of the top electrode/polymer interface, Journal of Physics D 34, 1947.

 

·         Koehler, M., da Luz, MGE. and Hümmelgen, IA.. (2000) Bipolar Tunneling Injection into a Single-Layer Organic Light Emitting Device, Journal of Physics D 33, 2096.

 

·         Koehler, M. and Hümmelgen, IA.. (2000) Regional Approximation Approach to Space Charge Limited Tunneling Injection in Organic Devices, Journal of Applied Physics 87, 3074.

 

Física IV

História da Física