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Title

Enhancing Moisture and Water Resistance in Perovskite Solar Cells by Encapsulation with Ultrathin Plasma Polymers

AuthorsIdígoras, Jesús; Aparicio, Francisco J. ; Contreras-Bernal, Lidia; Ramos-Terrón, Susana; Alcaire, María ; Sánchez-Valencia, J.R. ; Borrás, Ana ; Barranco, Ángel ; Anta, Juan A.
KeywordsEncasulaption
Moisture
Perovskite
Polymer
Vacuum plasma deposition
Issue Date2018
PublisherAmerican Chemical Society
CitationACS Applied Materials and Interfaces, 10(14): 11587-11594 (2018)
AbstractA compromise between high power conversion efficiency and long-term stability of hybrid organic–inorganic metal halide perovskite solar cells is necessary for their outdoor photovoltaic application and commercialization. Herein, a method to improve the stability of perovskite solar cells under water and moisture exposure consisting of the encapsulation of the cell with an ultrathin plasma polymer is reported. The deposition of the polymer is carried out at room temperature by the remote plasma vacuum deposition of adamantane powder. This encapsulation method does not affect the photovoltaic performance of the tested devices and is virtually compatible with any device configuration independent of the chemical composition. After 30 days under ambient conditions with a relative humidity (RH) in the range of 35–60%, the absorbance of encapsulated perovskite films remains practically unaltered. The deterioration in the photovoltaic performance of the corresponding encapsulated devices also becomes significantly delayed with respect to devices without encapsulation when vented continuously with very humid air (RH > 85%). More impressively, when encapsulated solar devices were immersed in liquid water, the photovoltaic performance was not affected at least within the first 60 s. In fact, it has been possible to measure the power conversion efficiency of encapsulated devices under operation in water. The proposed method opens up a new promising strategy to develop stable photovoltaic and photocatalytic perovskite devices
Publisher version (URL)htpp://dx.doi.org/ 10.1021/acsami.7b17824
URIhttp://hdl.handle.net/10261/163966
DOI10.1021/acsami.7b17824
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