What is it about?
Three types of poly(hexylthiophene)s with different primary structures were synthesized and their thermoelectric properties were analyzed in detail in relation to their doping levels. An electrochemical technique called potential-step chronocoulometry (PSC) was used to control the doping levels.
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Why is it important?
So far, two methods have been reported to control doping levels: (1) chemical methods using oxidizing agents and (2) the application of electrochemical transistors. However, in (1) the doping level cannot be quantified, and in (2) the range of control is very narrow, one to two orders of magnitude. The PSC method used in this study is important because it allows the doping level of conducting polymers to be controlled over a wide range of three to four orders of magnitude.
Perspectives
By analyzing the thermoelectric properties of conducting polymers with various molecular structures in relation to their doping levels, we can contribute to the elucidation of the thermoelectric conversion mechanism of conducting polymers, which has not yet been elucidated, and to the establishment of material design guidelines for practical use.
Dr Ichiro Imae
Hiroshima University
Read the Original
This page is a summary of: Investigation of organic thermoelectric materials using potential‐step chronocoulometry: Effect of polymerization methods on thermoelectric properties of poly(3‐hexylthiophene), Journal of Polymer Science, September 2020, Wiley,
DOI: 10.1002/pol.20200506.
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