A Conjugated, Neutral Surfactant as Electron-Injection Material for High-Efficiency Polymer Light-Emitting Diodes


  • This work was supported by the National Science Foundation, NSF-STC program (under DMR-0120967) and the University of Washington through the Technology Gap Innovation Fund.


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A novel conjugated neutral surfactant poly[9,9-bis(6′-(diethanolamino)hexyl)fluorene] (PFN-OH; see figure) has been developed as an efficient electron-injection material for fabricating highly efficient multilayer polymer light-emitting diodes. Compared to the traditional neutral surfactants used, PFN-OH possesses the combined advantages of good conductivity and excellent electron-injection ability from high-work-function metals (e.g., Al, Ag, or Au).