hBN Flake Embedded Al 2 O 3 Thin Film for Flexible Moisture Barrier

Due to the vulnerability of organic optoelectronic devices to moisture and oxygen, thin-film moisture barriers have played a critical role in improving the lifetime of the devices. Here, we propose a hexagonal boron nitride (hBN) embedded Al O thin film as a flexible moisture barrier. After layer-by...

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Bibliographic Details
Published in:Materials 2021-12, Vol.14 (23)
Main Authors: Jang, Wonseok, Han, Seunghun, Gu, Taejun, Chae, Heeyeop, Whang, Dongmok
Format: Article
Language:English
Online Access:Get full text
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Summary:Due to the vulnerability of organic optoelectronic devices to moisture and oxygen, thin-film moisture barriers have played a critical role in improving the lifetime of the devices. Here, we propose a hexagonal boron nitride (hBN) embedded Al O thin film as a flexible moisture barrier. After layer-by-layer (LBL) staking of polymer and hBN flake composite layer, Al O was deposited on the nano-laminate template by spatial plasma atomic layer deposition (PEALD). Because the hBN flakes in Al O thin film increase the diffusion path of moisture, the composite layer has a low water vapor transmission ratio (WVTR) value of 1.8 × 10 g/m day. Furthermore, as embedded hBN flakes restrict crack propagation, the composite film exhibits high mechanical stability in repeated 3 mm bending radius fatigue tests.
ISSN:1996-1944
1996-1944