Berlin 2012 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 72: Poster Session: Si-based Photovoltaics / Inorganic Photovoltaics / Structure and Transport in Organic Photovoltaics / Organic Semiconductors

HL 72.19: Poster

Wednesday, March 28, 2012, 16:00–19:00, Poster D

Hybrid solar cells based on ZnO nanorod arrays/ polymer — •Basudev Pradhan and Dieter Neher — Institut für Physik und Astronomie, Universität Potsdam, Potsdam-Golm, Germany

Hybrid solar cells have been fabricated using vertically oriented, high density, and crystalline array of zinc oxide (ZnO) nanorods and low bandgap hole conducting polymer. These hybrid solar cells take advantage of the both materials properties: solution processing of polymers and high electron mobility of inorganic semiconductors. The vertical nanorods provide direct conduction paths for the electrons from the point of injection to the collection electrode while maintaining large interface area between polymer and nanorod arrays. We have found that the device performance improves with deep infiltration of the polymer into the nanorod arrays and also with the improved crystallinity of the polymer induced by post annealing. In addition, the dependence of photovoltaic performance on the ZnO nanorod length was investigated and different low bandgap polymers have been used to achieve optimum performance.