Dresden 2011 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 19: Poster: Interfaces and Thin Films
CPP 19.16: Poster
Tuesday, March 15, 2011, 18:00–20:00, P2
Low temperature sintering of thin film polymer/TiO2 solar cells — •Christoph Fahrenson1, Sylvia Paul1, Michael Schröder3, Silvia Janietz2, and Dieter Neher1 — 1Universität Potsdam — 2Fraunhofer-Institut für Angewandte Polymerforschung, Golm — 3Justus-Liebig-Universität Gießen
Hybrid solar cells combine an organic semiconductor with a suitable inorganic semiconductor (ref 1). In addition to studies on the well-known Grätzel cell, combinations of a dense or nanostructured TMO layer with soluble conjugated polymers have been subject to recent investigations. One of the problems in the development of efficient polymer/TiO2 cell is the sintering of TiO2-layer. In most cases, the TiO2 layer is prepared via the sol-gel technique and annealing at high temperatures is needed to transform the amorphous layer morphology into a crystalline nanoporous structure. We present a new method to prepare thin layers from crystalline titania nanoparticles while keeping the processing temperature below 100°C. Interlinkage between the individual TiO2 particle is enforced by illumination with UVC-light. Scanning electron microscope (SEM) is used to image the morphology of the thin nanoporous layers. Solar cells were built with the Titanium dioxide layers sintered at moderate temperatures or after UVC sintering, using different donor polymers. Initial experiments show that cells with UVC-sintered layers show comparable solar cell performances than devices using conventional titania layers.
1.*A. C. Arango, L. R. Johnson, et al., Advanced Materials, 12, (2000).