Binary treatment of PEDOT:PSS films with nitric acid and imidazolium-based ionic liquids to improve the thermoelectric properties

Abstract

Abstract. Poly(3,4-ethylenedioxythiophene):poly-(styrenesulfonate) (PEDOT:PSS) is one of most prominent organic conductive polymer-based thermoelectric (TE) materials. Numerous combinations of doping and dedoping processes have been demonstrated to optimize the doping level of...

Effects of cation size on thermoelectricity of PEDOT:PSS/ionic liquid hybrid films for wearable thermoelectric generator application

“…40 Later Kee et al reported that ionic liquids consisting of EMIM DCA or EMIM DCl can manipulate the doping level and nanostructure of PEDOT:PSS through ion exchange, which leads to a remarkable increase in the conductivity and Seebeck coefficient (up to 538 S cm À1 and 35 mV K À1 , respectively). 41 Similar contributions have been realized for PEDOT:PSS lms constructed by ionic liquid coatings based on BMIM or EMIM cations with various anions; [42][43][44][45][46][47][48][49][50][51][52][53] and their thermoelectric performances are summarized in Table S1. † The addition of or treatment with these ionic liquids in previous studies indicates the direction for manipulating the thermoelectric performance.…”

Direct ink writing of PEDOT eutectogels as substrate-free dry electrodes for electromyography

“…A high-performance DES should induce not only an efficient ion exchange with PEDOT:PSS to increase mobility but also a uniform high-level p-doping of PEDOT that increases its intrinsic conductivity. 34…”

Thermoelectric Generator: Materials and Applications in Wearable Health Monitoring Sensors and Internet of Things Devices

“…[138] With this technique, S of the films increased from 28 to 49.3 µV K −1 while σ reduced from 1647 to 783 S cm −1 due to the decrease of its and with a ZT value of 0.12 at 300 K were obtained for the films. [139] In another study, 1D-PEDOT:PSS fibers were developed via wet-spinning process followed by treatment with sulfuric acid (H 2 SO 4 ), as a result, high σ and S values of 4029.5 S cm −1 and 19.2 µV K −1 were obtained, respectively. [140] As aforementioned, doping PEDOT:PSS with solvents can greatly enhance its σ, meanwhile dedoping can significantly increase S while substantially lowering σ.…”

“…A significant σ value of 1260 S cm −1 , enhanced S value from ≈16 to 34.8 µV K −1 and with a ZT value of 0.12 at 300 K were obtained for the films. [ 139 ] In another study, 1D‐PEDOT:PSS fibers were developed via wet‐spinning process followed by treatment with sulfuric acid (H 2 SO 4 ), as a result, high σ and S values of 4029.5 S cm −1 and 19.2 µV K −1 were obtained, respectively. [ 140 ]…”