Shelf Lifetime Analysis of Polymer Solar Cells Combining Frequency and Time Resolved Techniques
Alfonsina Abat Amelenan Torimtubun a, Maria Méndez b, Josep Pallarès a, Emilio Palomares b, Lluis F. Marsal a
a Department of Electronic, Electric and Automatic Engineering, Universitat Rovira I Virgili, 43007 Tarragona, Spain
b Institute of Chemical Research of Catalonia (ICIQ-BIST), Avinguda dels Països Catalans, 16, Tarragona, Spain
Proceedings of nanoGe Fall Meeting 2021 (NFM21)
#NewOPV21. Advances in Organic Photovoltaics
Online, Spain, 2021 October 18th - 22nd
Organizers: Uli Würfel and Jörg Ackermann
Poster, Alfonsina Abat Amelenan Torimtubun, 269
Publication date: 23rd September 2021

Understanding the device degradation mechanism is crucial for polymer solar cells (PSCs) commercialization. Here, the shelf degradation of PTB7-Th:PC70BM PSC with different electron transport layers (ETL) is investigated in accordance with ISOS-D1 protocol using a combined frequency and time resolved techniques. Both techniques provide an insight into how devices with different ETL were degraded and affected the active layer. Transient photovoltage / transient photocurrent (TPV / TPC) deliver information of the increasing trap density in the active layer upon degradation. Impedance spectroscopy (IS) promotes the change of interface trap density due to the defect of ETL/active layer interface upon degradation. 

European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 713679, Spanish Ministerio de Ciencia, Innovación y Universidades (MICINN/FEDER) RTI2018-094040-B-I00 by the Agency for Management of University and Research Grants (AGAUR) ref. 2017-SGR-1527 and from the Catalan Institution for Research and Advanced Studies (ICREA) under the ICREA Academia Award.

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