Improving efficiency and stability of perovskite solar cells with photocurable fluoropolymers

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.


Published in:
Science, 354, 6309, 203-206
Year:
2016
Publisher:
Washington, American Association for the Advancement of Science
ISSN:
0036-8075
Laboratories:




 Record created 2017-01-24, last modified 2018-03-18


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