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Popular Semiconducting Polymer for Organic Electronics

High purity and available online for priority dispatch


Overview | Specifications | MSDS | Literature and Reviews | Technical Support


Poly(9,9-dioctylfluorene-alt-bithiophene), also known as F8T2, is a semiconducting material that is widely used in organic electronics such as organic photovoltaics, polymer light-emitting diodes (PLED), and organic field-effect transistors (OFETs). Compared with poly-3-hexylthiophene, F8T2 has even higher mobilities of 0.1 cm2/V·s and relatively higher stability against chemical doping by environmental oxygen or residual impurities such as mobile sulphonic acid in PEDOT:PSS ink. This enables devices with higher on-off current ratios exceeding 105 and with better operating stability than printed poly-3-hexylthiophene devices[1].

The absorption in the blue region makes F8T2 an excellent donor polymer to blend with an acceptor with a complementary spectrum or assemble a tandem cell with other low bandgap-conjugated polymers with absorption extended in the red region.

Contact us for large orders of 5-10 grams, available with a lead time of 4-6 weeks.

The Luminosyn™ Range


High Purity Materials: Purified by Soxhlet extraction with methanol, hexane, and chlorobenzene under argon atmosphere.
Batch-Specific Data: Confidence in your materials with batch-specific GPC data for your thesis or publications.
Large Quantity Orders: Plan your experiments with confidence using polymers from the same batch.

General Information


CAS Number 210347-56-1
Chemical Formula (C37H44S2)n
Molecular Weight See batch information for details
HOMO / LUMO HOMO = 5.5 eV / LUMO = 3.1 eV [1]
Synonyms PFOT, Poly(9,9-dioctylfluorene-alt-bithiophene), Poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-bithiophene]
Classification or Family Polyfluorenes, Bithiophenes, Heterocyclic five-membered ring, Organic semiconducting materials, PLED green emitter materials, Organic Photovoltaics, Polymer Solar Cells, Light-emitting Diodes, OFET materials
Soluble in o-Xylene, chloroform, chlorobenzene, dichlorobenzene
Recommended Processing Solvents at 10mg/ml Dichlorobenzene or Chlorobenzene+dichlorobenzene (1:1 v/v)

Batch Details


Batch Number MW Mn PDI Stock Info
M0501A3 191,100 93,015 2.05 In Stock

Chemical Structure


F8T2 chemical structure
F8T2 chemical structure, CAS No. 210347-56-1

Device Structure(s)


Device structure ITO/PEDOT:PSS/TFB/F8T2/Ca [3]
Color Green
Max. Luminance 23,400
Max. Current Efficiency 3.68 cd/A
Max. Power Efficiency 2.9 lm W1

MSDS Documentation


F8T2 MSDS SheetF8T2 MSDS Sheet

Literature and Reviews


  1. Annealing effect of polymer bulk heterojunction solar cells based on polyfluorene and fullerene blend, J-H. Huang et al., Org. Electronics, 10, 27–33 (2009), doi:10.1016/j.orgel.2008.09.007.
  2. High-Efficiency Polymer LEDs with Fast Response Times Fabricated via Selection of Electron-Injecting Conjugated Polyelectrolyte Backbone Structure, M. Suh et al., ACS Appl. Mater. Interfaces, (2015), DOI: 10.1021/acsami.5b07862.
  3. On the use and influence of electron-blocking interlayers in polymer light-emitting diodes, R. Jin et al., Phys. Chem. Chem. Phys., 11, 3455-3462 (2009). DOI: 10.1039/B819200F.

Technical Support


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