Dresden 2017 – scientific programme

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DS: Fachverband Dünne Schichten

DS 32: Focussed Session: Oxide Semiconductors for Novel Devices II

DS 32.7: Talk

Wednesday, March 22, 2017, 17:15–17:30, CHE 89

Influence of annealing on the conductivity and transparency of niobium doped titanium dioxide electrodes prepared by sol-gel and their function in organic solar cells — •Peter Fischer¹, Roland Rösch², Shahidul Alam², Ulrich Schubert², Harald Hoppe², and Edda Rädlein¹ — ¹TU Ilmenau, Inst. für Werkstofftechnik, Gustav-Kirchhoff-Str. 6, 98693 Ilmenau, Germany — ²Friedrich-Schiller-Universität Jena, Center for Energy and Environmental Chemistry Jena, Philosophenweg 7a, 07743 Jena, Germany

In this work the conductivity and transmittance of niobium doped titanium dioxide (TNO) layers produced by sol-gel technique are investigated. The samples were coated by spin-coating. The thickness of the TNO was adjusted with different spin speeds. A pre-baking of the films on a hot plate at 80^∘C for one hour was performed. Further, the samples were heated in a rapid thermal processing furnace under different gas atmospheres, temperatures and time. The conductivity of the samples was measured using a four-point set-up and the transparency through a UV-VIS spectrophotometer. The best heating procedure was when the sample is annealed in an N2/H2 atmosphere to 1000^∘C for 10 minutes. In this case, a good sheet resistance of 181 Ω/Sq. was reached, which enables the use of the TNO processed with sol-gel as an electrode in optical devices. Finally, organic solar cells were manufactured using TNO as the electrode.