Weierstraß-Institut für Angewandte Analysis und Stochastik Leibniz-Institut im Forschungsverbund Berlin e.V. Preprint ISSN 0946 – 8633 Self-heating effects in organic semiconductor devices enhanced by positive temperature feedback Axel Fischer 1 , Paul Pahner 1 , Björn Lüssem 1 , Karl Leo 1 , Reinhard Scholz 1 , Thomas Koprucki 2 , Jürgen Fuhrmann 2 , Klaus Gärtner 2 , Annegret Glitzky 2 submitted: 9 March, 2012 1 Institut für Angewandte Photophysik (IAPP) Technische Universität Dresden George-Bähr-Straße 1 01069 Dresden, Germany E-Mail: axel.fischer@iapp.de paul.pahner@iapp.de bjoern.luessem@iapp.de karl.leo@iapp.de reinhard.scholz@iapp.de 2 Weierstraß-Institut Mohrenstraße 39 10117 Berlin Germany E-Mail: thomas.koprucki@wias-berlin.de juergen.fuhrmann@wias-berlin.de klaus.gaertner@wias-berlin.de annegret.glitzky@wias-berlin.de No. 1693 Berlin 2012 2010 Mathematics Subject Classification. 80A20, 35K05, 35C05, 65N08. Key words and phrases. Heat conductivity, organic semiconductor, C 60 , crossbar electrodes, Joule heating, device temperature, thermal resistance, break down, analytical solution, heat frow equation, 3D simulation, finite volume method. The authors thank IPMS Fraunhofer (Dresden) for use of the infrared camera. The work of Th. Koprucki has been supported by the Deutsche Forschungsgemeinschaft (DFG) within the collaborative research center SFB 787 Semiconductor Nanophotonics. The work leading to these results has received funding from the European Com- munitys Seventh Framework Programme under Grant Agreement No. FP7-267995 (NUDEV).