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.
|Titolo:||Improving efficiency and stability of perovskite solar cells with photocurable fluoropolymers|
|Data di pubblicazione:||2016|
|Digital Object Identifier (DOI):||10.1126/science.aah4046|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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