The Built-In Potential in Blue Polyfluorene-Based Light-Emitting Diodes

The Built-In Potential in Blue Polyfluorene-Based Light-Emitting Diodes

Energy level alignment in polyfluorene‐based polymer light‐emitting diodes (PLEDs) is studied with electroabsorption spectroscopy and cyclic voltammetry (CV). Using an active layer containing a blend of three polyfluorenes, it is found that the built‐in potential values are determined by the interpl...

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Veröffentlicht in:Advanced materials (Weinheim) 2008-06, Vol.20 (12), p.2410-2415
Hauptverfasser: Bodrozic, Vladimir, Brown, Thomas M., Mian, Shabbir, Caruana, Daren, Roberts, Matthew, Phillips, Nathan, Halls, Jonathan J., Grizzi, Ilaria, Burroughes, Jeremy H., Cacialli, Franco
Format: Artikel
Sprache:eng
Schlagworte:
built-in potential
electroabsorption spectroscopy
light-emitting diodes
polyfluorenes
polymers
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Zusammenfassung:Energy level alignment in polyfluorene‐based polymer light‐emitting diodes (PLEDs) is studied with electroabsorption spectroscopy and cyclic voltammetry (CV). Using an active layer containing a blend of three polyfluorenes, it is found that the built‐in potential values are determined by the interplay of the contacts' work function and the lowest and highest lying energy levels of the blend components.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200702346