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Poly(9,9-di-n-octylfluorenyl-2,7-diyl), known as F8 or PFO, is a polyfluorene specifically optimised for a variety of organic electronic applications.

General Information

Batch Details

Chemical structure of PFO (F8). CAS No.: 19456-48-5. Chemical formula: (C₂₉H₄₁)_n.

Characterisation

F8 distribution plot.

Applications

For a high-efficiency green OLED we recommend blending F8 with F8BT with the below specifications. This ink can then be applied either in air, or in a glovebox, with little difference in performance (provided exposure time and light levels are minimised). For more details see our fabrication guide.

Ossila材料PFO CAS:19456-48-5

At typical concentrations of 10 mg/ml, 100 mg of F8 (PFO) will make around 200 devices on Ossila's standard ITO substrates (20 x 15 mm), assuming 50% solution usage (50% loss in filtering and preparation).

OLED reference device:

• F8 with F8BT
• Blend ratio of 19:1 (F8:F8BT) in Toluene
• Total concentration of 10 mg/ml
• 0.45 μm PTFE filter
• Spun at 2000 rpm (approx. 70 nm thickness)

Ossila材料PFO CAS:19456-48-5

Pipetting 20 μl of the above solutions onto a substrate spinning at 2000 rpm should provide a good even coverage, with approximay 70 nm thickness. The substrate needs to be spun until dry, which is typically only a few seconds — 15 seconds should be ample to achieve this. Thermal annealing should be undertaken at 80°C for 10 minutes prior to cathode deposition.

Typical device architectures and performance

A basic, efficient OLED can be made using PEDOT:PSS as a hole-transport layer and Calcium/Aluminium as the electron contact. When used with the Ossila ITO substrates and shadow masks this produces an easy to fabricate yet efficient >100 cd/m²) device.