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Smith, S. Ryno, F. Hermerschmidt, J. Lyons, D. Patra, B. Wex, E. List-Kratochvil, C. Risko, S. Zhang, K. Moudgil, E. Jucov, C. Risko, T. Timofeeva, S. Getmanenko, C. Mullins, V. Nesterov, S. Lake, C. Li, S. Donor or Acceptor? Payne, N. Rice, S. McAfee, S. Li, P. Josse, C. Cabanetos, C. Risko, B. Purdum, N. Telesz, K. Jarolimek, S. Ryno, T. Gessner, N. Davy, A. Petty, II, Y. Zhen, Y. Shu, A. Facchetti, G. Collis, W. Hu, C. Wu, J. Anthony, R. Weitz, C. Yarnell, I. Davydenko, P. Dorovatovskii, V. Khrustalev, T. Timofeeva, F. Castellano, S. Marder, C. UPS, inverse photoemission, ion scattering, X-ray photoemission and I-V measurements are used to characterize the energetics and transport properties of the doped system.
We also describe on-going work using the even stronger reducing molecular agent decamethyl cobaltocene to n-dope phthalocyanines and pentacene.
Antoine Kahn received his Ph. He joined the Princeton faculty in , and was promoted to the rank of Associate Professor in and Full Professor in His research is in the field of semiconductor surfaces and interfaces. Over the past twelve years, he and his group focused on the structural, electronic and chemical properties of surfaces and interfaces of organic molecular and polymer films, and the physics of molecular level alignment across interfaces.
He has published over regular and review articles. It has been well established that hopping of charge carriers via localized states is in many cases the dominant transport mechanism in disordered organic solids, such as molecularly doped polymers, conjugated polymers, and organic glasses.
Nevertheless there is no agreement among researchers with respect to the appropriate theoretical description of the very key dependences of the carrier mobility u on the concentration of localized states N, on the concentration of charge carriers n, on temperature T, and on the applied electric field F in organic materials in the hopping regime. Modern concepts developed in the recent years to describe the dependences u N, n, T, F will be analyzed in the talk and their ability to describe experimental data will be discussed. Professor Sergei Baranovski received his Ph.
Petersburg, where he worked as a senior researcher till His research interests are devoted to optical properties of semiconductor quantum structures, to charge transport and optical properties of amorphous inorganic semiconductors, and to transport properties of organic disordered solids. Dramatic advances have been achieved in the performance of organic electronic devices during the last fifteen years. Several traditional devices, such as light emitting diodes, transistors, and solar cells, can now be made using pi-conjugated organic materials as the semiconductor. This is of interest because of the potential for low-cost fabrication, and for the exciting science organic materials bring to the table.
However, as in traditional silicon electronics, the operation of these devices relies predominantly on electronic carriers, while ions are neglected. I will draw on two examples to illustrate the advantages that can be gained and the penalties that must be paid when, in addition to electronic carriers, ions are also employed. The first one is electroluminescent devices based on ionic transition metal complexes. These materials, studied for years by electrochemists and spectroscopists in solution, can now yield efficient solid-state electroluminescent devices that are considered for display and lighting applications.
Materials issues that need to be addressed for these devices to succeed in applications will be discussed, and emphasis will be given on modeling and understanding the device physics. The second example is electrochemical transistors based on conducting polymers. These devices act as converters between ionic and electronic current, providing a powerful interface between the worlds of biology and electronics.
Their applications in sensors will be discussed, with emphasis on understanding device operation. George Malliaras is the Lester B. He serves on the board of directors of Infotonics, a MEMS fabrication facility designed to provide a rapid pathway to commercialization, is the chairman of the editorial board of the Journal of Materials Chemistry, and serves on the editorial board of Sensors.
Malliaras' research interests span several aspects of organic electronics, including structure and morphology of organic thin films, their processing and patterning, charge transport and injection in organic semiconductors, device physics, and applications of organic devices in biosensors. Tris 8-hydroxyquinoline aluminum Alq3 is the archetypal small molecular weight amorphous semiconductor. There is a substantial amount of data describing its charge transport characteristics as a function of thickness, injection contact, temperature and electric field.
We briefly summarize this data and focus on two issues: charge injection into Alq3 and the electric field dependence of charge carrier mobility in Alq3. We present an analytic description of mobility by considering non-equilibrium carrier distributions within a percolation framework. He received his B. Electrical Engineering from the University of Sydney in with first class honors and university medal, and his M.
He joined MIT in His Ph. Research interests include electrical and exciton transport in organic materials, energy transfer, metal-organic contacts, heterogeneous integration of biological materials, and mechanical transistors. I propose a computational protocol to predict the absolute mobility of molecular semiconductors without adjustable parameters. The system dependent parameters are computed using a combination of classical molecular dynamics simulations and quantum chemical methods. The model used to connect the computable quantities with the observable temperature dependent mobility takes into account the effects of molecular reorganization energy and the fluctuation of the transfer integral due to thermal motions.
The absolute value of the hole mobility, computed for the case of rubrene, is in excellent agreement with the experiments. The possibility of using computational chemistry methods to improve the theoretical models of charge transfer will be discussed in some detail. The predictive capabilities of the model presented in this work will be further validated considering the recent THz spectroscopy measurements performed by R. Alessandro Troisi received his PhD in Physical Chemistry from the University of Bologna with a thesis on the charge transfer reactions in condensed phases.
In I was a research fellow at the University of Bologna where he studied the charge transport mechanism in organic solid crystals. He currently works on organic semiconductors, quantum dynamics and theory of molecular self-assembly. We present new approaches in simulations of organic semiconductor devices.
We present statistical modified mean-media approach MMMA and transport path distribution approach. Within MMMA approach we succeed to reproduce effective heating effect predicted by numerical experiments on hopping transport on the manifold of energetically disordered hopping sites. Using MMMA approach we reveal the dependence of recombination on field and charge carriers concentrations. Transport path distribution TPD approach used for description and analysis of current transients in organic semiconductor devices.
We present analysis of experimental results using this method. Yevgeni Preezant was born at He had got B. Recently he is a doctoral fellow in polymer semiconductor group of Prof. Nir Tessler in the Technion. Research interest of Mr. Yevgeni Preezant include both experimental ,theoretical and simulation aspects of polymer semiconductors field. Skip to the navigation. Skip to the content. Workshop on Organic Electronics.
Li, G. Interfaces in Organic Thin-Film Transistors All kinds of field-effect transistors include multiple interfaces, at which the major issues of the device converge. Charge Transfer at Hybrid Interfaces Charge transfer at interfaces, both hybrid and organic-organic, involving materials for modern molecular electronics, are determining for device performance in future organic electronics.