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70.3L: Late‐News Paper : All Wet Processable Barrier Film for Flexible OLED Displays
Author(s) -
Kikuchi Tomoyuki,
Nagayama Kenichi,
Yamada Yukika,
Usami Hisanao
Publication year - 2013
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/j.2168-0159.2013.tb06244.x
Subject(s) - materials science , montmorillonite , oled , layer (electronics) , diffusion barrier , moisture , barrier layer , composite material , diffusion , water vapor , chemical engineering , chemistry , organic chemistry , physics , thermodynamics , engineering
We have succeeded in developing a world‐top‐class high barrier film with the water vapor transmission ratio of 3times10 −5 (g/m 2 /day). The developed film is all‐wet‐processable and crack‐free and realized by a layer‐by‐layer assembly of clay nanosheets. The clay nanosheets are grown by alternately depositing exfoliated montmorillonite clay and cationic binder. The mechanism of the enhanced barrier performance is presumably due to increased path length of gas diffusion along nanosheets. The developed barrier film is sufficiently impermeable to moisture and will provide a cost‐effective solution to produce flexible OLEDs.