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CPP: Fachverband Chemische Physik und Polymerphysik

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

CPP 19.25: Poster

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

The influence of solvent atmosphere on bulk heterojunction solar cells — •Weijia Wang¹, Shuai Guo¹, Kuhu Sarkar¹, Markus Schindler¹, David Magerl¹, Martine Philipp¹, Jan Perlich², and Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching — ²DESY, Notkestrasse 85, 22603 Hamburg

Organic solar cells have attracted tremendous attention in the last decades. Among different architectures of solar cell, the morphology called bulk heterojunction (BHJ) plays an important role as it yields high device efficiencies. Annealing or solvent additive processing is a way to optimize the morphology of BHJ films. However, if a solar cell encapsulation is taken into account, it is also crucial to figure out how solvent atmosphere, evaporated from residual solvent, affects the solar cells, especially for the one treated with solvent. Therefore, in this work, BHJ solar cells are stored in solvent atmosphere to accelerate the related aging. In order to gain the fundamental understanding of the solar cell degradation, the final structure of BHJ films is investigated with AFM and GISAXS. Additionally, the crystalline structure is investigated with GIWAXS and compared to the absorption in the visible regime.