Regensburg 2019 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 45: HL Posters III

HL 45.24: Poster

Donnerstag, 4. April 2019, 18:30–21:00, Poster E

Investigation of New Organic Acceptor Materials for Bulk-Heterojunction Solar Cells — •Julian Butscher1,2, Sebastian Hahn3, Uwe Bunz3, and Yana Vaynzof1,21Kirchhoff-Institut für Physik, Universität Heidelberg, Heidelberg, Germany — 2Center for Advanced Materials (CAM), Heidelberg, Germany — 3Organisch-Chemisches Institut, Universität Heidelberg, Heidelberg, Germany

Promising cost reductions and advantages in fabrication, organic photovoltaics attracted much research effort over the last years. In this context, the choice of new non-fullerene acceptor materials for the active layer plays a key role in increasing efficiency and stability of bulk-heterojunction (BHJ) solar cells.

We investigate bent phenanthrene-analogous N-heteroacenes as non-fullerene acceptor materials in organic solar cells. By means of different spectroscopic and microscopic techniques, we examine their photovoltaic properties. First experiments show promising power conversion efficiencies. In order to improve the solar cells’ performance, we study different preparation parameters as for example annealing time, acceptor-donor stochiometry and additive concentration.

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