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Structural Characterization of Conjugated Polyelectrolyte Electron Transport Layers by NEXAFS Spectroscopy
Author(s) -
Park Juhyun,
Yang Renqiang,
Hoven Corey V.,
Garcia Andres,
Fischer Daniel A.,
Nguyen ThucQuyen,
Bazan Guillermo C.,
DeLongchamp Dean M.
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.200702995
Subject(s) - materials science , polyelectrolyte , xanes , spectroscopy , conjugated system , polymer , counterion , characterization (materials science) , substrate (aquarium) , chemical engineering , surface modification , chemical physics , nanotechnology , ion , organic chemistry , chemistry , composite material , physics , oceanography , quantum mechanics , geology , engineering
NEXAFS spectroscopy of conjugated polyelectrolytes used as the electron transport layer in polymer light‐emitting diodes reveals a substrate‐dependent accumulation of charged groups at the surface (see figure). The measurements are also consistent with a preferential orientation of tetrahedral counterions at the surface.