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DOE OSTI · 2280688

Robust, High-Performing Maize–Perovskite-Based Solar Cells with Improved Stability

Giuri, Antonella·Rolston, Nicholas·Colella, Silvia·Listorti, Andrea·Corcione, Carola Esposito·Elmaraghi, Hannah·Lauciello, Simone·Dauskardt, Reinhold H.·Rizzo, Aurora
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Abstract

Herein, we focus on improving the long-term chemical and thermomechan-ical stability of perovskite solar cells (PSCs), two major challenges currently limiting their commercial deployment. Our strategy incorporates a long-chain starch polymer into the perovskite precursor. The starch polymer confers multiple beneficial effects by forming hydrogen bonds with the methylammonium iodide precursor, templating perovskite growth that results in a compact and homogeneous film deposited in a simple one-step coating (antisolvent-free). The inclusion of starch in the methylammonium lead iodide films strongly improves their thermomechanical and environmental stability while maintaining a high photovoltaic performance. The fracture energy (G c ) of the film is increased to above 5 J/m 2 by creating a nanocomposite that provides intrinsic reinforcement at grain boundaries. Additionally, improved optoelectronic properties achieved with the starch polymer enable good photostability of the active layer and enhanced resistance to thermal cycling.

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14 SOLAR ENERGYgrain boundariesmechanical reinforcementperovskite solar cellphotostabilitystarchthermomechanical stability

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Giuri, Antonella, Rolston, Nicholas, Colella, Silvia, Listorti, Andrea, Corcione, Carola Esposito, Elmaraghi, Hannah, Lauciello, Simone, Dauskardt, Reinhold H., Rizzo, Aurora. 2021-09-27. Robust, High-Performing Maize–Perovskite-Based Solar Cells with Improved Stability. https://doi.org/10.1021/acsaem.1c02058

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