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http://dx.doi.org/10.5369/JSST.2017.26.2.96

Effect of Solvent Annealing on the Characteristics of PEDOT:PSS as a Ammonia Gas Sensor Film  

Noh, Wang Gyu (School of Chemical Engineering, Yeungnam University)
Yeom, Se-Hyuk (Gumi Electronics & Information Technology Research Institute)
Lee, Wanghoon (Gumi Electronics & Information Technology Research Institute)
Shin, Han Jae (Gumi Electronics & Information Technology Research Institute)
Kye, Ji Won (Gumi Electronics & Information Technology Research Institute)
Kwak, Giseop (School of Applied Chemical Engineering, Kyungpook National University)
Kim, Se Hyun (School of Chemical Engineering, Yeungnam University)
Ryu, Si Ok (School of Chemical Engineering, Yeungnam University)
Han, Dong Cheul (Gumi Electronics & Information Technology Research Institute)
Publication Information
Journal of Sensor Science and Technology / v.26, no.2, 2017 , pp. 96-100 More about this Journal
Abstract
Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been extensively studied as the active material in ammonia gas sensor because of its fast response time, high conductivity and environmental stability. It is well known that a post annealing process for organic devices based on PEDOT:PSS significantly increases the device performance. In this study, we propose the solvent annealing of PEDOT:PSS and investigated its effects. As a results, post solvent annealing on PEDOT:PSS lead to the surface chemical and physical properties change. These changes result in improved conductivity of the PEDOT:PSS. In additional, ammonia sensitivity of solvent annealed PEDOT:PSS become higher than pristine polymer film. The enhancement is mainly caused by the depletion of gas barrier PSS and structural re-forming PEDOT networks. We believe that the post solvent annealing is a promising method to achieve highly sensitivity PEDOT:PSS films for applications in efficient, low-cost and flexible ammonia gas sensor.
Keywords
Gas sensors; Solvent annealing; PEDOT:PSS; Ammonia gas;
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Times Cited By KSCI : 3  (Citation Analysis)
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