Backbone Fluorination of Benzodithiophene-Based Hole-Transporting Polymers for Enhanced Organic Transistors and Nanocrystal Photovoltaics 


Vol. 26,  No. 9, pp. 3721-3728, Sep.  2025
10.1007/s12221-025-01039-3


PDF
  Abstract

Chemical substitution is a propitious strategy for optimizing the charge transport properties of π-conjugated donor–acceptor (D–A) semiconducting materials in organic electronic devices. To explore the effects of fluorine substitution on the electronic and structural properties of organic field-effect transistors (OFETs) and photovoltaics (PVs), two new benzo[1,2-b:4,5-b′]dithiophene (BDT)-based hole transport polymers (HTPs) were synthesized and characterized. The BDT monomers consisting of 2,6-bis(trimethytin)-4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophene monomer (BDT monomer), and (4,8-bis(5-(2-ethylhexyl)-4-fluorothiophen-2-yl)benzo[1,2-b:4,5-b']dithiophene-2,6-diyl)bis(trimethylstannane) (FBDT monomer) were combined with 2,5-dibromofuran to produce BDT-Fu and FBDT-Fu HTPs. Fluorine integration significantly improved the molecular structure, optical, electrochemical, and morphological properties of these polymers, and the optoelectronic properties of the resulting devices. In FBDT-Fu, the fluorination enhanced crystallinity, optical absorption, and morphology, leading improvement in hole mobility of 3.49 × 10–3 cm2 V–1 s–1 in optimized poly(methyl methacrylate) (PMMA)-gated OFETs, with an on/off current ratio exceeding 103. Consequently, FBDT-Fu-based silver bismuth sulfide (AgBiS2) nanocrystal PVs achieved a power conversion efficiency of 5.5%, a high fill factor of 55.46%, and an open-circuit voltage of 0.504 V under 1-sun illumination. This molecular design strategy offers an effective approach for optimizing the electrical properties of organic conjugated semiconductors for next-generation optoelectronic devices.

  Statistics
Cumulative Counts from November, 2022
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.


  Cite this article

[IEEE Style]

V. Nketia-Yawson, H. J. Kim, J. H. Lee, H. Ahn, B. Nketia-Yawson, J. Choi, J. W. Jo, "Backbone Fluorination of Benzodithiophene-Based Hole-Transporting Polymers for Enhanced Organic Transistors and Nanocrystal Photovoltaics," Fibers and Polymers, vol. 26, no. 9, pp. 3721-3728, 2025. DOI: 10.1007/s12221-025-01039-3.

[ACM Style]

Vivian Nketia-Yawson, Hae Jeong Kim, Ji Hyeon Lee, Hyungju Ahn, Benjamin Nketia-Yawson, Jongmin Choi, and Jea Woong Jo. 2025. Backbone Fluorination of Benzodithiophene-Based Hole-Transporting Polymers for Enhanced Organic Transistors and Nanocrystal Photovoltaics. Fibers and Polymers, 26, 9, (2025), 3721-3728. DOI: 10.1007/s12221-025-01039-3.

Search
(IN TITLE, AUTHOR, ABSTRACT,KEYWORDS)

Advanced Search ▼

POPULAR KEYWORDS
(TOP 10 KEYWORDS)

Recent Publications
(LAST 3 YEARS)

pISSN : 1229 - 9197
eISSN : 1875 - 0052

Impact Factor(2024): 2.3