In situ conductivity measurements of polythiophene partially containing 3,4-ethylenedioxythiophene and 3-hexylthiophene

Abstract

Optical and electrochemical properties of a novel polythiophene partially containing 3,4-ethylenedioxythiophene (EDOT), poly(3,3″″-dihexyl-3′,4′,3‴,4‴-diethylenedioxy-2,2′:5′,2″:5″,2‴:5‴,2″″-quinquethiophene), in a neutral state, which was synthesized by polycondensation using direct C-H coupling reaction, were firstly investigated. In situ electrical conductivity of the doped polymer film was measured simultaneously with doping levels at different potentials to yield charge carrier mobilities as a function of doping level of the polymer. The highest conductivity was found to be around 10 1 S cm −1 , which is almost one-order higher than that of an EDOT-containing polythiophene obtained by electrolytic polymerization, poly(3″,4″-ethylenedioxy-2,2′:5′,2″-terthiophene).

Analysis of Conjugated Polymers Conductivity by in situ Electrochemical‐Conductance Method

“…ization of PANI, [26] substituted PPy, [27] polyalcoxythiophenes, [28][29][30][31][32] and substituted polythiophenes. [33][34][35][36][37][38][39][40][41][42][43][44] From these experiments it was determined the influence of the thickness, morphology and the monomer chemical structure on the ion mobility. Nowadays, the two bands electrode has been replaced by more sophisticated electrodes arrangements.…”

“…The conductance of the deposited material ( G ) can be estimated by using the Ohm's law (Equation 2). This technique was used for the characterization of PANI, substituted PPy, polyalcoxythiophenes, and substituted polythiophenes . From these experiments it was determined the influence of the thickness, morphology and the monomer chemical structure on the ion mobility.…”

Investigation of organic thermoelectric materials using potential‐step chronocoulometry: Effect of polymerization methods on thermoelectric properties of poly(3‐hexylthiophene)

“…And using this technique, we succeeded in establishing in-situ measurement of electrical conductivity at each doping level. [12][13][14][15][16][17] Utilizing this technique of controlling the doping level by the applied potential, we have recently studied the Seebeck coefficient of commercially available poly(3-hexylthiophene) (regP3HT(c), Figure 1a) in association with its doping levels. [18] It was found that in the logarithmic plot of the Seebeck coefficient and the doping level, a good linear relationship with a slope of −1 was obtained in a wide doping range of 1-20%.…”

Synthesis and Properties of Donor-acceptor-type Polymers Comprising Alkoxy-substituted Bithiophene Units

“…We have previously reported the synthesis of a series of oligothiophenes with well-defined structures and investigated their optical, electrochemical, and electrical properties [20][21][22][23][24]. These studies revealed that the electronic properties of oligothiophenes can be tuned easily and systematically by adjusting their chemical structures.…”