Development of graphene/MWCNT/Ag2Se hybrid thermoelectric materials with different concentrations of PEDOT:PSS for low-temperature applications

Gürlek G., Özkan Ş., Şener M., Gürses B. O., SEKİ Y.

Solid State Sciences, cilt.158, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 158
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1016/j.solidstatesciences.2024.107759
  • Dergi Adı: Solid State Sciences
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Biotechnology Research Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Carbon-based hybrid polymers, Low-temperature thermoelectric, PEDOT:PSS, Silver selenide, Taguchi analysis
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Studies in low-temperature applications in the fields of medicine and wearable technologies are limited to thermoelectric works with commercial poly(3,4-ethylenedioxy-thiophene):polystyrenesulfonate (PEDOT:PSS) aqueous solutions. Unlike other studies, in this study, the effects of adding graphene, multi-walled carbon nanotube (MWCNT) and silver selenide into PEDOT:PSS at different concentrations in the production of semiconductor polymer inks on the thermoelectric properties were examined using Taguchi analysis. In the examination without adding additives, as the ratio of PEDOT:PSS increased from 1 % to 3 % and 5 %, 2.50 and 4.92 times increase in electrical conductivity and 1.19 and 1.49 times increase in the Seebeck coefficient were observed, respectively. P- and n-type inks were produced in three different concentrations using four different materials. According to the results of the study, to obtain p-type material with good performance, the concentration of PEDOT:PSS in the mixture must be high and the Ag2Se concentration must be low, and also to get a high-performance n-type material, the concentration of Ag2Se must be as high as the homogeneous mixture allows, and PEDOT:PSS concentration must be low. When the highest Power Factor and Figure of Merit results were evaluated, PPp9 was found for p-type material and PPn2 was found for n-type material, and it is considered that these inks are suitable for printing with 3D printing technology.