Order Code: M503
Not in stock

F8T2 is now available featuring:

  • High purity - higher purity means more precise emission and longer life-time for OLED devices - F8T2 is purified via Soxhlet extraction with methanol, hexane and chloroform under an argon atmosphere
  • Good solubility in most of common solvents (toluene, chloroform and chlorobenzene)
  • Larger quantity orders so you can plan your experiments with polymer from the same batch)


 Batch Quantity Price
M503 250 mg £200.00
M503 1 g £679.00
M503 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 Out of Stock
M503 >50,000 <3 In stock

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, f8t2, 210347-56-1
Chemical structure and appearance of Poly(9,9-dioctylfluorene-alt-bithiophene), F8T2, CAS No. 210347-56-1.



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. 

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  


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); http://dx.doi.org/10.1063/1.126991.
  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); http://dx.doi.org/10.1063/1.3601476.


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.