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Efficient Electroluminescent Devices Based on a Chelated Osmium( II ) Complex
Author(s) -
Bernhard S.,
Gao X.,
Malliaras G.G.,
Abruña H.D.
Publication year - 2002
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 - 10.1002/1521-4095(20020318)14:6<433::aid-adma433>3.0.co;2-w
Subject(s) - osmium , electroluminescence , materials science , ionic bonding , photochemistry , optoelectronics , chemical physics , ion , nanotechnology , ruthenium , chemistry , catalysis , organic chemistry , layer (electronics)
Red light from osmium complexes has been shown to occur with a peak radiance that exceeded 6000 cd m –2 at only 6 V. External quantum efficiencies that are of the order of 1 % have been achieved. The importance of ionic space charge effects in the mechanism of device operation is discussed here. The Figure shows the structure of the osmium complex.