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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: Poster Session 1 (joint session with BP)

CPP 19.24: Poster

Dienstag, 1. April 2014, 09:30–13:00, P1

Effect of a third component addition on high efficiency organic solar cells — •Rosa Maria Torrademé, Shuai Guo, Biye Cao, Weijia Wang, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialen, James-Franck-Str. 1, 85748 Garching, Germany

Rapid progress has been envisioned on the solution-processed organic bulk heterojunction (BHJ) solar cells in the past decade, and the efficiency has exceeded the threshold for commercial application of 10%. In this work the record-setting system PTB7:PC71BM is investigated regarding the influence of addition of a third component. The aim to introduce this new component is to improve the conductivity of the active layer using polymers with relatively higher crystallinity than that of the host polymer PTB7. Photophysical properties are probed with UVvis spectroscopy and PL measurements. The inner film morphology is revealed by GISAXS and the film crystallinity is probed with GIWAXS. Surface structures are probed with AFM. The device performance is probed by measuring IV-characteristics. Therefore, the influence of the third component on the performance of the solar cells as well as the structure of the active film is addressed.