Regensburg 2013 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 12: Poster: Nanoparticles and Composite Materials

CPP 12.6: Poster

Montag, 11. März 2013, 17:30–19:30, Poster C

Sol-Gel Templated Zinc Oxide Films for Applications in Hybrid Photovoltaics — •Erik Braden, Kuhu Sakar, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany

In recent years a broad field of research concerning hybrid solar cells has been developed as they show a high potential to become an important source of green energy. Hybrid solar cells consist of an inorganic electron acceptor and an organic hole-conductor. In the present study, zinc oxide is utilized as the inorganic material in the form of nanostructures. Zinc oxide (ZnO) nanostructures are synthesized on silicon substrates forming grid-like morphology. The synthesis is done by using a sol-gel mechanism coupled with an amphiphilic diblock copolymer poly(styrene-block-4-vinyl pyridine) P(S-b-4VP), acting as a template. The morphology is synthesized by using zinc acetate dihydrate (ZAD) as a suitable commercial ZnO precursor on silicon (100) substrates using different deposition techniques. This involves spin-coating, spray-coating, dip-coating, blade-coating and solution casting. It is tried to produce a homogenous film with a certain thickness range between 300 nm and 500 nm which is expected to be most favorable for the solar cell performance. The influences of the different coating techniques on the morphology are investigated by optical microscopy, scanning electron microscopy (SEM) and atomic force microscopy (AFM). The thickness is measured with white light interferometry and height profilometry. An overview about the surface roughness of the films is obtained via atomic force microscopy (AFM).