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    Enhanced Thermoelectric Performance and Lifetime in Acid-Doped PEDOT:PSS Films via Work Function Modification

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    enhanced_enhanced thermo.pdf
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    Accepted manuscript
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    Type
    Article
    Authors
    Villalva, Diego Rosas
    Haque, Mohammed cc
    Nugraha, Mohamad
    Baran, Derya cc
    KAUST Department
    KAUST Solar Center (KSC)
    Material Science and Engineering
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2020-07-28
    Online Publication Date
    2020-07-28
    Print Publication Date
    2020-09-28
    Permanent link to this record
    http://hdl.handle.net/10754/664539
    
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    Abstract
    In recent years, most of the work on p-type organic thermoelectrics focus on improving the thermoelectric properties of PEDOT:PSS through a sequential doping-dedoping process. However, the air-stability of thermoelectric parameters of these systems, which is essential for the realization of reliable devices remains largely unexplored. In this study, Poly (ethyleneimine)-ethoxylate (PEIE) acts as a work function modification agent and encapsulation layer to improve the thermoelectric performance and air-stability of nitric acid (HNO3) doped PEDOT:PSS films. The evaporation of HNO3 is responsible for a simultaneous decrease in electrical conductivity and an increase in the Seebeck coefficient leading to the degradation of the power factor. PEIE reduces the evaporation of HNO3 from PEDOT:PSS, and increases the power factor from 72 to 168 μW m-1K-2. After a week of exposure to air, the films show a power factor of 124 μW m-1K-2, retaining 74% of its initial thermoelectric merits. These results underscore the importance of PEIE as a material for enhancing thermoelectric performance and air-stability in the development of polymer-based thermoelectrics.
    Citation
    Villalva, D. R., Haque, M. A., Nugraha, M., & Baran, D. (2020). Enhanced Thermoelectric Performance and Lifetime in Acid-Doped PEDOT:PSS Films via Work Function Modification. ACS Applied Energy Materials. doi:10.1021/acsaem.0c01511
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Applied Energy Materials
    DOI
    10.1021/acsaem.0c01511
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsaem.0c01511
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsaem.0c01511
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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