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A Flexible Encapsulation Structure for Ambient‐Air Operation of Light‐Emitting Electrochemical Cells
Author(s) -
Asadpoordarvish A.,
Sandström A.,
Edman L.
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500245
Subject(s) - materials science , encapsulation (networking) , electronics , epoxy , electrochemistry , optoelectronics , nanotechnology , oxygen , electrode , composite material , electrical engineering , computer science , chemistry , computer network , organic chemistry , engineering
The emerging field of organic electronics is heralded because it promises low‐cost and flexible devices, and it was recently demonstrated that a light‐emitting electrochemical cell (LEC) can be fabricated with cost‐efficient methods under ambient air. However, the LEC turns sensitive to oxygen and water during light‐emission, and it is therefore timely to identify flexible encapsulation structures. Here, we demonstrate that a multilayer film, featuring a water and oxygen barrier property of ≈1 × 10 –3 g/m 2 /day and ≈1 × 10 –3 cm 3 /m 2 /bar/day respectively, is fit for this task. By sandwiching an LEC between such multilayer barriers, as attached by a UV‐curable epoxy, we realize flexible LECs with performance on par with identical glass‐encapsulated devices, and which remain functional after one year storage under air.