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Highly Efficient White Polymer Light‐Emitting Diodes Based on Nanometer‐Scale Control of the Electron Injection Layer Morphology through Solvent Processing
Author(s) -
Zhang Yong,
Huang Fei,
Chi Yun,
Jen Alex K.Y.
Publication year - 2008
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200701988
Subject(s) - materials science , electroluminescence , polymer , layer (electronics) , conjugated system , nanometre , morphology (biology) , diode , optoelectronics , solvent , chemical engineering , nanotechnology , organic chemistry , composite material , chemistry , biology , engineering , genetics
Highly efficient white polymer light‐emitting diodes (WPLEDs) are demonstrated using neutral conjugated polymer surfactant PFN‐OH as the electron‐injection layer through solution processing. The electroluminescence spectra and luminance efficiency are strongly dependent on the morphology of the PFN‐OH films. The dramatic improvement of device performance is attributed to the efficient hole‐blocking ability due to mixed solvent‐induced PFN‐OH chain aggregation.