Poly[9,?9-?dioctyl-?9',?9'-?bis[3-?(trimethylammonio)?propyl]?[2,?2'-?bi-?9H-?fluorene]?-?7,?7'-?diyl iodide

PFN-I is?the diiodide salt of PFN, and is a conjugated polymer electrolyte (CPE). It is commonly used as an electron-interface layer material in organic electronic devices (including OLED, OPV and perovskite solar cells) to improve extraction efficiency.?PFN-I is also used as an active layer material for blue OLED devices.