Flexible polymer thermoelectric device based on PEDOT:PSS and surface treated pyromellitic dianhydride‐oxydianiline polyimide substrate

Abstract

Flexible polymer thermoelectric devices based on poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and pyromellitic dianhydride‐oxydianiline polyimide polyimide (PI) were fabricated and investigated in this work. PI was selected as a substrate for PEDOT:PSS to secure from repeated bending cycles of flexible device. To enhance the interfacial adhesion between PEDOT:PSS and PI, oxygen plasma treatment was used on the surface of PI substrate. The effect of the surface treatment with oxygen plasma on the synthesized PI substrate was significant. The polar component of surface free energy of PI was increased from 2.8 to 31.8 mJ/m2. The power factor of PEDOT:PSS on the PI substrate was increased from 25.86 to 43.78 μW m−1 K−2. Also, as a result of 10 k times of bending test, the electrical performance consistency and the mechanical stability of the fabricated devices were confirmed. This verified fabricated flexible polymer thermoelectric devices based on PEDOT:PSS and PI are suitable for the various applications.

A novel n‐type poly(sulfonic acid diphenyl aniline) and its nanocomposites with large Seebeck coefficient enhanced with external magnetic fields

“…1 However, the use of these materials is limited due to their toxicity and high cost because they are produced from rare earth elements using non-economic processes. 2,3 Instead of these inorganic TE materials, polymer-based TE materials appear more attractive due to their low cost, non-toxicity, easy processability, mechanically flexiblity, and intrisically low thermal conductivity. [4][5][6][7][8][9][10] TE efficiency of a material is given by figure of merit (ZT), which is defined as ZT = S 2 σ T/κ, where S, σ, T, and κ are Seebeck coefficient, electrical conductivity, absolute temperature, and thermal conductivity, respectively.…”

Highly Soluble Fluorinated Polyimides Synthesized with Hydrothermal Process towards Sustainable Green Technology

“…Generally, PI is synthesized by a two-step polycondensation. In an organic solvent, tetracarboxylic dianhydride and diamine react to form a precursor, poly(amic-acid) (PAA) by polyaddition, and then the imide ring is cyclized through imidization process [13,14]. There are two typical types of imidization methods: thermal and chemical imidization.…”