Dresden 2014 – scientific programme
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DS: Fachverband Dünne Schichten
DS 35: Poster I: Application of thin films; Focus session: Sensoric micro and nano-systems; Focus Session: Sustainable photovoltaics with earth abundant materials; Graphen (joint session with TT; MA; HL; DY; O); Ion and electron beam induced processes; Layer properties: electrical, optical, and mechanical properties; Magnetic/organic interfaces, spins in organics and molecular magnetism; Micro- and nanopatterning (jointly with O); Organic electronics and photovoltaics (jointly with CPP, HL, O); Thermoelectric materials
DS 35.64: Poster
Wednesday, April 2, 2014, 17:00–20:00, P1
Charge Transport in Organic Solar Cells studied by (Photo-) CELIV — •Lars Müller1,2, Diana Nanova1,2,3, Norman Mechau1,4,5, Robert Lovrincic1,2,3, Uli Lemmer1,2,4,5, Rasmus R. Schröder6, and Wolfgang Kowalsky1,2,3 — 1InnovationLab GmbH, Heidelberg, Germany — 2University of Heidelberg, Kirchhoff-Institute for Physics, Germany — 3TU Braunschweig, Institute for High-Frequency Technology, Germany — 4Karlsruhe Institute of Technology, Light Technology Institute, Germany — 5Karlsruhe Institute of Technology, Institute of Microstructure Technology, Germany — 6CellNetworks, BioQuant, University of Heidelberg, Germany
The efficiency of organic solar cells is determined by certain factors such as the materials themselves or the morphology. Parameters like thermal treatment or the processing technique highly influence some of these factors. Therefore, investigations on working devices are of utmost importance to deepen the already achieved understanding. We study this relationship between processes, materials, and intrinsic properties with the CELIV- and Photo-CELIV-technique (Photoinduced Charge Extraction by Linearly Increasing Voltage). Parameters such as overall device performance and morphology are linked to the CELIV-measured intrinsic properties charge carrier mobility and density. We investigate fully working solar cells with varying materials, processes and treatments. Additionally, charge-transport-studies on P3HT with different molecular weights are performed and compared to morphological changes, measured with analytical TEM and AFM.