FREE shipping to on qualifying orders when you spend or more.


Product Code M0501A1

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

Luminosyn™ F8T2

Luminosyn™ F8T2 is now available.

High molecular weight and high purity
F8T2 is purified via Soxhlet extraction with methanol, hexane and chloroform under an argon atmosphere

Good solubility
Good solubility in most of common solvents (toluene, chloroform and chlorobenzene)

Large quantity orders
Plan your experiments with confidence with 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 / Family Polyfluorenes, Bithiophenes, Heterocyclic five-membered ring, Organic semiconducting materials, PLED green emitter materials, Organic Photovoltaics, Polymer Solar Cells, Light-emitting Diodes, OFET materials
Suggested Solvents Chloroform, chlorobenzene or dichlorobenzene

Chemical Structure

Chemical structure of F8T2
Chemical structure of Poly(9,9-dioctylfluorene-alt-bithiophene)

Device Structure(s)

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

MSDS Documentation

F8T2 MSDSF8T2 MSDS sheet


Batch Quantity Price
M0501A1 250 mg £200.00
M0501A1 1 g £679.00
M0501A1 5 g / 10 g* Please enquire

*For 5 - 10 grams order quantity, the lead time is 4-6 weeks.

Batch information

Batch Mw Mn PDI Stock info
M502 136,320 53,866 2.53 Discontinued
M503 45,586 16,493 2.76 Discontinued
M0501A1 63,525 26,387 2.41 In Stock

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.
  4. High-Resolution Inkjet Printing of All-Polymer Transistor Circuits, H. Sirringhaus et al., Science, 290 (5499), 2123-2126 (2000), DOI: 10.1126/science.290.5499.2123.
  5. Organic Light-Emitting Diodes Based on Poly(9,9-dioctylfluorene-co-bithiophene) (F8T2), P. Levermore et al., Adv. Funct. Mater., 19, 950–957 (2009); DOI: 10.1002/adfm.200801260.
  6. Mobility enhancement in conjugated polymer field-effect transistors through chain alignment in a liquid-crystalline phase, H. Sirringhaus et al., Appl. Phys. Lett. 77, 406 (2000);
  7. 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.
  8. Hole mobility effect in the efficiency of bilayer heterojunction polymer/C60 photovoltaic cells, A. Macedo et al., Appl. Phys. Lett. 98, 253501 (2011);

To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.