Thin Film Encapsulation of Organic Solar Cells by Direct Deposition of Polysilazanes from Solution

Organic electronic devices (OEDs), e.g., organic solar cells, degrade quickly in the presence of ambient gases, such as water vapor and oxygen. Thus, in order to extend the lifetime of flexible OEDs, they have to be protected by encapsulation. A solution‐based encapsulation method is developed, whic...

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Bibliographic Details
Published in:Advanced energy materials 2019-07, Vol.9 (26), p.n/a
Main Authors: Channa, Iftikhar Ahmed, Distler, Andreas, Zaiser, Michael, Brabec, Christoph J., Egelhaaf, Hans‐Joachim
Format: Article
Language:English
Subjects:
coated barriers
Deposition
Diffusion barriers
Electronic devices
Encapsulation
flexible barrier films
Interlayers
Laminates
moisture permeation
Organic chemistry
organic solar cell lifetimes
perhydropolysilazanes
Photovoltaic cells
Polysilazane
Protective coatings
Relative humidity
Service life assessment
Silicon dioxide
Solar cells
Thin films
Ultraviolet radiation
Water vapor
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Summary:Organic electronic devices (OEDs), e.g., organic solar cells, degrade quickly in the presence of ambient gases, such as water vapor and oxygen. Thus, in order to extend the lifetime of flexible OEDs, they have to be protected by encapsulation. A solution‐based encapsulation method is developed, which allows the direct deposition of the diffusion barrier on top of OEDs, thus avoiding lamination of barrier films. The method is based on the deposition of a perhydropolysilazane (PHPS) ink and its subsequent conversion into a silica layer by deep UV irradiation. The resulting barrier films show water vapor transmission rates (WVTRs) of
ISSN:1614-6832
1614-6840
DOI:10.1002/aenm.201900598