Organometal halide perovskite solar cells have demonstrated high conversion efficiency but poor long term stability against ultraviolet irradiation and water. We show that rapid light-induced free-radical polymerization at ambient temperature produces multifunctional fluorinated photopolymer coatings that confer luminescent and easy-cleaning features on the front-side of the devices, while concurrently forming a strongly hydrophobic barrier toward environmental moisture on the back contact side. The luminescent photopolymers re-emit ultraviolet light in the visible range, boosting perovskite solar cells efficiency to nearly 19% under standard illumination. Coated devices reproducibly retain their full functional performance during prolonged operation, even after a series of severe aging tests carried out for more than 6 months.
Photocurable fluoropolymers improve efficiency and stability of perovskite solar cells / Bella, Federico; Griffini, G.; Correa Baena, J. P.; Saracco, Guido; Grätzel, M.; Hagfeldt, A.; Turri, S.; Gerbaldi, Claudio. - STAMPA. - (2016), pp. 115-115. (Intervento presentato al convegno Merck Young Chemists Symposium tenutosi a Rimini (Italy) nel 25-27th October, 2016).
Photocurable fluoropolymers improve efficiency and stability of perovskite solar cells
BELLA, FEDERICO;SARACCO, GUIDO;GERBALDI, CLAUDIO
2016
Abstract
Organometal halide perovskite solar cells have demonstrated high conversion efficiency but poor long term stability against ultraviolet irradiation and water. We show that rapid light-induced free-radical polymerization at ambient temperature produces multifunctional fluorinated photopolymer coatings that confer luminescent and easy-cleaning features on the front-side of the devices, while concurrently forming a strongly hydrophobic barrier toward environmental moisture on the back contact side. The luminescent photopolymers re-emit ultraviolet light in the visible range, boosting perovskite solar cells efficiency to nearly 19% under standard illumination. Coated devices reproducibly retain their full functional performance during prolonged operation, even after a series of severe aging tests carried out for more than 6 months.Pubblicazioni consigliate
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https://hdl.handle.net/11583/2654709
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