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( Entifar Siti Aisyah Nurmaulia ),김용현 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Recently, silver nanowires (AgNWs) have received a great interest as a transparent conducting material for various optoelectronic devices. Here, high performance stretchable transparent electrodes based on AgNWs and conductive polymer PEDOT:PSS on an elastomeric polydimethylsiloxane (PDMS) has been investigated. The surface modifier introduced in this study significantly improves the hydrophilicity of the PDMS surface and enhances the bonding between AgNWs and PDMS. The resulting hybrid transparent electrodes show a low sheet resistance of 25 Ω/sq and high transmittance of 82%, which are comparable to the performance of indium tin oxide (ITO) reference electrodes. In addition, the hybrid transparent electrodes show a remarkably small resistance change below 10 % up to the strain of 100 %. Furthermore, the hybrid electrodes are employed into stretchable heater devices.
Entifar, Siti Aisyah Nurmaulia,Han, Joo Won,Lee, Dong Jin,Ramadhan, Zeno Rizqi,Hong, Juhee,Kang, Moon Hee,Kim, Soyeon,Lim, Dongchan,Yun, Changhun,Kim, Yong Hyun TaylorFrancis 2019 Science and technology of advanced materials Vol.20 No.1
<P><B>ABSTRACT</B></P><P>We report on a new surface modifier which simultaneously improves electrical, optical, and mechanical properties of silver nanowire-based stretchable transparent electrodes. The transparent electrodes treated with 11-aminoundecanoic acid achieve a low sheet resistance of 26.0 ohm/sq and a high transmittance of 90% with an excellent stretchability. These improvements are attributed to the effective formation of a strong chemical bond between silver nanowire networks and elastomeric substrates by 11-aminoundecanoic acid treatment. The resistance change of the optimized silver nanowire/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thin-films is only about 10% when the film is stretched by 120%. In addition, the chemical stability of stretchable silver nanowire films is significantly improved by the introduction of conductive PEDOT:PSS overcoat film. The optimized electrodes are utilized as high-performance stretchable transparent heaters, successfully illustrating its feasibility for future wearable electronics.</P>
( Entifar Siti Aisyah Nurmaulia ),김용현 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Recently, silver nanowires (AgNWs) have received a great interest as a transparent conducting material for various optoelectronic devices. Here, high performance stretchable transparent electrodes based on AgNWs and conductive polymer PEDOT:PSS on an elastomeric polydimethylsiloxane (PDMS) has been investigated. The surface modifier introduced in this study significantly improves the hydrophilicity of the PDMS surface and enhances the bonding between AgNWs and PDMS. The resulting hybrid transparent electrodes show a low sheet resistance of 25 Ω/sq and high transmittance of 82%, which are comparable to the performance of indium tin oxide (ITO) reference electrodes. In addition, the hybrid transparent electrodes show a remarkably small resistance change below 10 % up to the strain of 100 %. Furthermore, the hybrid electrodes are employed into stretchable EL devices with ZnS: Cu phosphors, resulting in good device performance.
Joo Won Han,Ajeng Prameswati,Siti Aisyah Nurmaulia Entifar,Jung Ha Kim,Anky Fitrian Wibowo,Jihyun Park,Jonghee Lee,Soyeon Kim,Dong Chan Lim,Myoung‑Woon Moon,Min‑Seok Kim,Yong Hyun Kim 대한금속·재료학회 2022 ELECTRONIC MATERIALS LETTERS Vol.18 No.6
Highly conductive, flexible, and durable silver nanowire (AgNW)-embedded carboxymethyl cellulose (CMC)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) (s-CMC/PEDOT:PSS) composite films were investigated forapplication in wearable heaters and on-skin sensors. The electrical conductivities of the CMC/PEDOT:PSS composites wereoptimized by controlling the PEDOT:PSS weight ratio in CMC, and the sheet resistance decreased significantly from 6828(CMC:PEDOT:PSS = 1:5) to 83 Ω/sq (CMC:PEDOT:PSS = 1:17). Furthermore, AgNW networks were embedded onto thesurface of the CMC/PEDOT:PSS films to further enhance their conductivity. The introduction of AgNW networks resultedin a significant decrease in the sheet resistance of the composites from 81 to 7 Ω/sq. In addition, the s-CMC/PEDOT:PSScomposite film exhibited high mechanical stability in repeated bending tests. The uniformly distributed AgNWs inside thecomposites enhanced the electrical contact between the conducting PEDOT:PSS domains in the CMC matrix. Based on thehighly conductive, flexible, and robust s-CMC/PEDOT:PSS composite films, high-performance wearable heating devicesand on-skin sensors were fabricated. The wearable heater achieves a high temperature of 159.5 ℃ with uniform temperaturedistribution. Furthermore, on-skin sensors with s-CMC/PEDOT:PSS composites were conformably integrated on human skinwhich successfully detected various human motions, including finger bending, wrist bending, skin touch, ankle motions, andwalking in real-time. The sensors exhibit high sensing performance with high sensitivity, conformability, superior mechanicalrobustness, and low power consumption. The high-performance s-CMC/PEDOT:PSS composite film could be a promisingflexible and conductive composite material with new opportunities in next-generation electronics.
Seo, Yoon Kyung,Joo, Chul Woong,Lee, Jonghee,Han, Joo Won,Lee, Dong Jin,Entifar, Siti Aisyah Nurmaulia,Kim, Soukyoon,Cho, Nam Sung,Kim, Yong Hyun Elsevier 2017 Journal of luminescence Vol.187 No.-
<P><B>Abstract</B></P> <P>Highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films are prepared by introducing a new solvent 2-ethoxyethanol and are optimized by acid-free solvent post treatment. The behavior of samples are investigated with various coating conditions. The change of electrical performance for 2-ethoxyethanol added PEDOT:PSS films with various post treatment methods is studied. Upon post treatment, the sheet resistance greatly decreases attributed to a structural change with removal of insulating PSS in the film. Based on these conductive films, we demonstrate efficient ITO-free green phosphorescent organic light-emitting diodes (OLEDs). The efficiency of OLEDs with post-treated PEDOT:PSS electrodes is greater than that of OLEDs with untreated PEDOT:PSS electrodes. The results illustrate a promising future for flexible, low-cost, ITO-free OLEDs employing PEDOT:PSS electrodes optimized by 2-ethoxyethaol with acid-free solvent post treatment.</P>