Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Effect of Solvent Annealing on the Characteristics of PEDOT:PSS as a Ammonia Gas Sensor Film

용매열처리에 따른 PEDOT:PSS 암모니아 가스 감지막 특성 변화

  • 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)
  • Received : 2016.12.19
  • Accepted : 2017.03.17
  • Published : 2017.03.31
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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

References

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