Fluorinated Benzothiadiazole-based polymers with chalcogenophenes for organic field-effect transistors

Mingi Sung, Hyeonjin Yoo, Dahyeon Yoo, Hyungju Ahn, Gayeon Park, Kwang Hyun Park, Sung Ho Song, Byoung Hoon Lee, Junghoon Lee

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


The effect of incorporating chalcogenophene comonomers, namely, furan, thiophene, and selenophene, on the optoelectrical properties of cyclopentadithiophene-based polymers (P1, P2, and P3, respectively) for organic field-effect transistors is reported. The optical, electrical, and morphological properties of the P1, P2, and P3 are investigated. Compared to the other polymers, the P2 showed the highest crystallinity with the shortest π–π stacking distance (dπ–π ≈ 3.58 Å) and the longest crystalline length (Lc ≈ 40 Å), as confirmed by two-dimensional grazing incidence wide-angle X-ray diffraction. However, P3 had the highest hole mobility (μ = 0.25 cm2/V-s), which is higher than P1 (μ = 0.06 cm2/V-s) and P2 (μ = 0.20 cm2/V-s). The relatively lower mobility of the P2 compared to that of the P3 is attributed to its island-like crystalline domains, confirmed by atomic force microscopy results and the lower edge-on crystallite ratio. Our findings suggest a new design guideline for developing high-mobility π-conjugated polymers.

Original languageEnglish
Article number106649
JournalOrganic Electronics
StatePublished - Dec 2022

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.


  • Benzothiadiazole
  • Chalcogenophenes
  • Cyclopentadithiophene
  • Organic field-effect transistors
  • Semiconducting polymers


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