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Water/Methanol‐Soluble Conjugated Copolymer as an Electron‐Transport Layer in Polymer Light‐Emitting Diodes
Author(s) -
Ma W.,
Iyer P. K.,
Gong X.,
Liu B.,
Moses D.,
Bazan G. C.,
Heeger A. J.
Publication year - 2005
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.200400963
Subject(s) - materials science , polymer , indium tin oxide , conjugated system , copolymer , layer (electronics) , diode , optoelectronics , electroluminescence , light emitting diode , luminous efficacy , chemical engineering , polymer chemistry , photochemistry , nanotechnology , composite material , chemistry , engineering
Multilayer polymer light‐emitting diodes are made using semiconducting polymers. An emissive polymer layer is cast from solution in an organic solvent, and a water‐soluble (or methanol‐ soluble) conjugated copolymer is used for the electron transport layer (ETL) in the following device configuration: (indium tin oxide)/poly(3,4‐ethylenedioxythiophene)/emissive polymer/ETL/Ba/Al. Devices with an ETL have significantly lower turn‐on voltages, higher brightness values, and improved luminous efficiencies.