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Efficient, Low Operating Voltage Polymer Light‐Emitting Diodes with Aluminum as the Cathode Material
Author(s) -
Cao Yong,
Yu Gang,
Heeger Alan J.
Publication year - 1998
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/(sici)1521-4095(199808)10:12<917::aid-adma917>3.0.co;2-k
Subject(s) - materials science , electroluminescence , optoelectronics , cathode , light emitting diode , polymer , luminescence , diode , aluminium , electroluminescent display , nanotechnology , composite material , electrical engineering , layer (electronics) , engineering
The architecture of polymer light‐emitting diodes (LEDs) consists of a thin film of luminescent conjugated polymer sandwiched between two contacts. The difficulty of working with low‐workfunction, electron‐injecting metals such as calcium, which are generally considered necessary for high luminescence efficiency, has led to relatively high‐workfunction metals such as aluminum being examined for their potential as cathode materials. The performance enhancement produced by blending the electroluminescent polymer with a specific class of surfactant molecules is reported.