Smart copolymers of ditriphenylaminedithienothiophene with ethylenedioxythiophene for multicolor energy storage systems

Sebahat Topal, Ozan Karakaya, Esma Sezer, Belkis Ustamehmetoglu, Turan Ozturk*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Energy storage materials, having multifunctional properties, are particularly important for the development of intelligent power systems. In this study, conjugated monomers 4′,4′-(dithieno[3,2-b:2′,3′-d]thiophene-3,5-diyl)bis(N,N-diphenyl-[1,1′-biphenyl]-4-amine) (DTTpTPA, D) and 3,4-ethylenedioxythiophene (EDOT, E) were electrocopolymerized on ITO surface in different mole ratios. The copolymer films were investigated in terms of energy storage, electrochromic properties and surface morphology. Inclusion of EDOT units into the polymer chain made a significant impact on the energy storage and electrochromic properties of the resultant copolymers. The P(D1-1E) film, which was obtained at a mole ratio of nD/nE = 1/1, showed the best capacitance value of 22 mF cm−2. All the copolymers displayed a wide range of color change during their redox processes. The best coloration efficiency value of 196 C−1 cm2 was obtained with P(D10-1E) film, having multi-electrochromic property of red, green, gray and blue colors. A symmetric solid-state energy storage device of P(D1-1E) exhibited a capacitance of 6.58 mF cm−2 with high energy and high-power density, which proved that P(D1-1E) is a good candidate for energy storage applications.

Original languageEnglish
Pages (from-to)21979-21988
Number of pages10
JournalInternational Journal of Energy Research
Issue number15
Publication statusPublished - Dec 2022

Bibliographical note

Publisher Copyright:
© 2022 John Wiley & Sons Ltd.


We thank The Higher Education Council of Turkey (YOK) and TUBITAK for grants to Sebahat Topal (Ph.D., 100/2000 YOK, and TUBITAK BIDEB 2211A), and Istanbul Technical University Research Fund (Project number 42325). Istanbul Technical University Research Fund, Grant/Award Numbers: 42325, 2211A; TUBITAK; The Higher Education Council of Turkey Funding information

FundersFunder number
Higher Education Council of Turkey
Istanbul Technical University Research Fund2211A
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu100/2000 YOK, BIDEB 2211A
Council for Higher Education
Istanbul Teknik Üniversitesi42325


    • dithienothiophene
    • electrochromic
    • energy storage
    • ethylenedioxythiophene
    • triphenylamine


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