용매열처리에 따른 PEDOT:PSS 암모니아 가스 감지막 특성 변화
Effect of Solvent Annealing on the Characteristics of PEDOT:PSS as a Ammonia Gas Sensor Film
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Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been extensively studied as the active material in ammo- nia gas sensor because of its fast response time, high conductivity and environmental stability. It is well known that a post annealingprocess for organic devices based on PEDOT:PSS significantly increases the device performance. In this study, we propose the solventannealing 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 sensitivityof solvent annealed PEDOT:PSS become higher than pristine polymer film. The enhancement is mainly caused by the depletion of gasbarrier 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.
Abstract
Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been extensively studied as the active material in ammo- nia gas sensor because of its fast response time, high conductivity and environmental stability. It is well known that a post annealingprocess for organic devices based on PEDOT:PSS significantly increases the device performance. In this study, we propose the solventannealing 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 sensitivityof solvent annealed PEDOT:PSS become higher than pristine polymer film. The enhancement is mainly caused by the depletion of gasbarrier 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.
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