Structure-Electrochemical Property Relationship of F vs 2F Substituents in Low Bandgap Conjugated Polymers

Cevher D., TOPPARE L. K., ÇIRPAN A.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, cilt.170, sa.6, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 170 Sayı: 6
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1149/1945-7111/acdd20
  • Dergi Adı: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Analytical Abstracts, Applied Science & Technology Source, Chemical Abstracts Core, Chimica, Compendex, Computer & Applied Sciences, INSPEC
  • Anahtar Kelimeler: fluorination, benzothiadiazole, dithienopyrrole, specific capacitance, DONOR-ACCEPTOR POLYMERS, SOLAR-CELLS, PERFORMANCE, BENZOTHIADIAZOLE, SUPERCAPACITOR, GAP, FLUORINATION, UNIT, BENZODITHIOPHENE, CONDUCTIVITY
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Two alternating copolymers bearing fluorinated benzothiadiazole as a strong acceptor unit and dithienopyrrole as a strong donor unit were designed and synthesized to discuss the effect of the number of fluorine atom substitution. The polymers were characterized via cyclic voltammetry, spectroelectrochemistry, electrochemical impedance spectroscopy and galvanostatic charge discharge studies. Besides a red shift in absorption spectra, an anodic shift was also observed in the oxidation potentials when number of fluorine atom increases in the polymer backbone. Galvanostatic charge-discharge (GCD) studies revealed that difluorinated polymer exhibited enhanced area specific capacitance compared to mono fluorinated polymer.