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23.1: Efficient Electron Injection from Bilayer Cathode with High Work Function Metal
Author(s) -
Cao Yong,
Wu Hongbin,
Huang Fei,
Mo Yueqi,
Yang Wei
Publication year - 2004
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.1825801
Subject(s) - cathode , bilayer , work function , materials science , layer (electronics) , polymer , optoelectronics , electron , metal , copolymer , chemical engineering , composite material , chemistry , membrane , metallurgy , physics , biochemistry , quantum mechanics , engineering
A novel bilayer cathode has been developed to variety of RGB emitting polymers to form an effective electron injector. An effective electron injection from high work function metal such as Al can be realized by incorporation of a thin layer of water‐ or alcohol‐soluble copolymer between metal and emitting layer. The device performance of polymer LEDs fabricated with such bilayer cathodes can be enhanced to levels comparable to or even higher than that obtained by using Ca and Ba cathode.