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HL: Fachverband Halbleiterphysik

HL 61: Posters III (Organic-inorganic perovskite semiconductors; Organic photovoltaics and electronics; Photovoltaics; Energy science; New materials and concepts)

HL 61.17: Poster

Mittwoch, 18. März 2015, 15:00–20:00, Poster F

Design of an energy-harvesting storage device based on organic solar cells and supercapacitor — •Lukas Hörlin¹, Andreas Baumann¹, Matthias Wiener¹, Gudrun Reichenauer¹, and Vladimir Dyakonov^1,2 — ¹Bayerisches Zentrum für Angewandte Energieforschung, Am Galgenberg 87, D-97074 Würzburg — ²Experimentelle Physik 6, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg

A general problem of renewable energy system like photovoltaics and wind power is their volatility causing fluctations in the power grid. Energy storage systems such as batteries or capacitors are promising candidates to overcome this fluctations making use of renewable energy more reliably. We designed a small-scale energy-harvesting storage device, which demonstrates the storage and use of the redundant energy by photovoltaic devices, namely organic bulk heterojunction (BHJ) solar cells, in a supercapacitor for a certain period of time. State-of-the-art organic BHJ solar cells were prepared by spin-coating and characterized by means of current-voltage characterisitics. The supercapacitor as the storage unit was analyzed by cyclic voltammetry. The energy harvesting system is realized by the ability to connect single organic solar cells in parallel and/or serial, which allowed us to vary the photocurrent and photovoltage of the unit and adapt it to the supercapacitor storage unit.