Choi, Kyoungjun Nam, Sooji Lee, Youngbin Lee, Mijin Jang, Jaeyoung Kim, Sang Jin Jeong, Yong Jin Kim, Hyeongkeun Bae, Sukang Yoo, Ji-Beom Cho, Sung M. Choi, Jae-Boong Chung, Ho Kyoon Ahn, Jong-Hyun Park, Chan Eon Hong, Byung Hee 2024-01-20T07:01:26Z 2024-01-20T07:01:26Z 2021-09-05 2015-06 1936-0851 https://pubs.kist.re.kr/handle/201004/125374 Preventing reactive gas species such as oxygen or water is important to ensure the stability and durability of organic electronics. Although inorganic materials have been predominantly employed as the protective layers, their poor mechanical property has hindered the practical application to flexible electronics. The densely packed hexagonal lattice of carbon atoms in graphene does not allow the transmission of small gas molecules. In addition, its outstanding mechanical flexibility and optical transmittance are expected to be useful to overcome the current mechanical limit of the inorganic materials. In this paper, we reported the measurement of the water vapor transmission rate (WVTR) through the 6-layer 10 x 10 cm(2) large-area graphene films synthesized by chemical vapor deposition (ND). The WVTR was measured to be as low as 10(-4) g/m(2). day initially, and stabilized at similar to 0.48 g/m(2). day, which corresponds to 7 times reduction in WVTR compared to bare polymer substrates. We also showed that the graphene-passivated organic field-effect transistors (OFETs) exhibited excellent environmental stability as well as a prolonged lifetime even after 500 bending cycles with strain of 2.3%. We expect that our results would be a good reference showing the graphene's potential as gas barriers for organic electronics. English AMER CHEMICAL SOC HIGH-MOBILITY PERFORMANCE PERMEATION LAYER PASSIVATION STABILITY MEMBRANES OXYGEN Reduced Water Vapor Transmission Rate of Graphene Gas Barrier Films for Flexible Organic Field-Effect Transistors Article 10.1021/acsnano.5b01161 1 ACS NANO, v.9, no.6, pp.5818 - 5824 ACS NANO 9 6 5818 5824 scie scopus 000356988500021 2-s2.0-84935012080 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article HIGH-MOBILITY PERFORMANCE PERMEATION LAYER PASSIVATION STABILITY MEMBRANES OXYGEN graphene barrier water vapor transmittance rate OFETs bending cycles