PFN, also sold as PFN-DOF, is a conjugated polyelectrolyte (CAS 673474-74-3) designed to act as an electron-interface, or cathode interlayer, in organic photovoltaic (OPV) devices. Placing a thin PFN layer at the cathode side helps the device collect charge more efficiently.
Its full chemical name is poly[(9,9-bis(3'-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)], with the repeat formula (C52H70N2)n. The polymer dissolves well in polar solvents such as methanol when a small amount of acetic acid is added, which makes it suitable for spin-coating very thin films.
In inverted PTB7:PC70BM solar cells built with a PFN interlayer of 5.5 to 10 nm, Ossila reports power conversion efficiencies of up to 7.1%, while values up to 9.2% have been reported in the literature. Ossila PFN has also been used in published work on all-organic, fully printed semitransparent photodetectors.
- Electron-interface (cathode interlayer) in inverted organic solar cells to improve extraction efficiency.
- Interlayer between ITO and PTB7:PC70BM active layers in high-efficiency OPV devices.
- Solution-processed thin interface films deposited by spin-coating from methanol with acetic acid.
- Interface material in printed semitransparent organic photodetectors.
| Brand | Ossila |
|---|---|
| CAS number | 673474-74-3 |
| Molecular formula | (C52H70N2)n |
| Purity | — |
| Category | — |
| Pack sizes | 100 mg, 250 mg, 500 mg, 1 g |
| Physical form | — |
| Storage | — |
- Product code: M0221A2
- Full name: Poly[(9,9-bis(3'-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9–dioctylfluorene)]
- Synonyms: PFN, PFN-DOF
- Batch: M0221A2
- Solubility: Polar solvents with small amount of acetic acid
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