Regensburg 2019 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 50: Organic Electronics and Photovoltaics III - Organic Photovoltaics

CPP 50.10: Vortrag

Donnerstag, 4. April 2019, 12:00–12:15, H18

Investigating in-operando the effects of solvent additives on the stability of organic solar cells based on PTB7-Th:PC71BM — •Dan Yang¹, Franziska Löhrer¹, Volker Körstgens¹, Armin Schreiber¹, Sigrid Bernstorff², Jillian Buriak³, and Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching — ²Elettra Sincrotrone Trieste, Basovizza, 34149 Trieste, Italy — ³University of Alberta, Department of Chemistry, Edmonton, Canada

Due to low cost, flexibility, solution processing and large-scale fabrication, enormous attention is focusing on the research and development for higher organic photovoltaics performance over the last decades. In recent years, the power conversion efficiency (PCE) of organic solar cells(OSCs) of single-junction OSCs has reached 14.6 %, which is still lower than the inorganic counterparts. To further optimize the performance, additive solvents are widely used in the solution of bulk heterojunction. While the influents of those additives on the device degradation behavior are essential to be disclosed. In this work, PTB7-Th: PC71BM solar cells with two different additive solvents are probed with in-operando GISAXS measurements to resolve the morphology changes during operation. Combining with the J-V performance, the degradation mechanisms behind the additive solvents is figured out.