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Vacuum thermally evaporated polymeric zinc acrylate as an organic interlayer of organic/inorganic multilayer passivation for flexible organic thin-film transistors

Title
Vacuum thermally evaporated polymeric zinc acrylate as an organic interlayer of organic/inorganic multilayer passivation for flexible organic thin-film transistors
Other Titles
inorganic multilayer passivation for flexible organic thin-film transistors
Author
장재영
Keywords
FIELD-EFFECT TRANSISTORS; GAS-DIFFUSION BARRIERS; PERFORMANCE; STABILITY; DEVICES; LAYER; ELECTRONICS; MECHANISMS; DISPLAYS; VAPOR
Issue Date
2012-12
Publisher
Royal Society of Chemistry
Citation
Journal of materials chemistry, 2012, 22(48), P.25395-25401
Abstract
Polymeric zinc acrylate (pZA) was introduced as an organic interlayer for the inorganic/organic multilayer passivation of flexible organic thin film transistors (OTFTs). The pZA film was deposited by thermally evaporating a zinc diacrylate (ZDA) monomer under high vacuum (<10(-5) Torr) and applying UV irradiation. The conversion of ZDA into a polymeric phase was confirmed by FTIR analysis, breakdown voltage measurements and the photopatternability of the film before and after UV irradiation. Vacuum-thermally evaporated pZA film showed good surface smoothness and a high permeation activation energy (53 kJ mol(-1)) compared to conventional polymeric films. As an interlayer for multilayer passivation, vacuum-thermally evaporated silicon monoxide (SiO) was introduced as the inorganic counterpart of the pZA interlayer. A multilayer film comprising 6.5 pairs of layers showed a water vapor transmission rate (WVTR) of 0.055 g m(-2) per day, a 25-fold improvement over the WVTR of a single SiO film (1.207 g m(-2) per day). OTFTs encapsulated with 6.5 pairs of polymeric zinc acrylate/silicon monoxide layers showed prolonged stability over 97 days. In addition, the passivation layer did not show crack formation, and sustained barrier characteristics, even after 500 bending tests.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2012/JM/c2jm34760a#!divAbstracthttp://hdl.handle.net/20.500.11754/48378
ISSN
0959-9428; 1364-5501
DOI
10.1039/c2jm34760a
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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