Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.546
Publication date: 16th December 2024
Bulk heterojunction organic solar cells (BHJ OSCs) potentially can offer low cost, large area, flexible, light-weight, clean, and quiet alternative energy sources for indoor and outdoor applications. OSCs using non-fullerene acceptors (NFAs) have garnered a lot of attention during the past few years and shown dramatic increases in the power conversion efficiency (PCE). PCEs higher than 20% for single-junction systems have been achieved, but the device lifetime is still too short for practical applications. Thus, understanding factors that affect the OSC long-term stability is crucial. In this talk, I will discuss the impact of different blend materials and device structures on the stability. A combination of characterization methods such as solid state Nuclear Magnetic Resonance (NMR), 4D TEM, GIWAXS, resonant soft X-ray scattering (RSoXS), AFM, X-ray photoelectron spectroscopy (XPS), Electron paramagnetic resonance (EPR) spectroscopy, and capacitance spectroscopy are employed to gain insight into the device stability. We propose strategies to improve the device stability.
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