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Photo‐oxidation of poly( p ‐phenylenevinylene)
Author(s) -
Xing Kezhao Z.,
Johansson Nicklas,
Beamson Graham,
Clark David T.,
Brédas JeanLuc,
Salaneck William R.
Publication year - 1997
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.19970091306
Subject(s) - x ray photoelectron spectroscopy , materials science , polymer , light emitting diode , conjugated system , ultraviolet photoelectron spectroscopy , spectroscopy , photochemistry , ultraviolet , thin film , optoelectronics , chemical engineering , nanotechnology , chemistry , composite material , physics , quantum mechanics , engineering
The operating lifetime of light‐emitting devices (LEDs) based on poly( p ‐phenylenevinylene) (PPV), one of the most widely used conjugated polymers for polymer‐based LEDs, is sensitive to air exposure. The effects associated with the photo‐oxidation of PPV in air are examined. Possible photo‐induced oxidation products are proposed based on simulations using stilbene as a model compound. X‐ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy, and quantum‐chemical calculations all indicate that a series of photo‐oxidation products from on the surface of the PPV thin films.