Regensburg 2019 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Poster Session III

CPP 37.53: Poster

Mittwoch, 3. April 2019, 11:00–13:00, Poster B1

Determination of morphological evolution in bulk heterojunction polymer solar cells — •Hongwon Kim, Tommaso Riccitelli, Xinyu Jiang, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching

Organic solar cells have been progressed via novel organic materials indicating improved efficiencies as well as high stability. Bulk heterojunction (BHJ) polymer solar cells offer the advantage of a high power/mass ratio combined with a mechanical flexibility. However, the achieved best efficiency values still stay behind that of other solar cell technologies, which demonstrates the needs for more fundamental understanding. In the present study, BHJ solar cells are investigated which consist of a low-bandgap donor (PffBT4T-2OD) and a non-fullerene acceptor (EH-IDTBR). The active layers are investigated with X-ray scattering techniques to track morphological evolution during the ageing processes via different external conditions. In addition, with spectroscopic measurements under identical conditions we get insights into changes on a molecular level.