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US 4,950,950 AGranted
Electroluminescent device with silazane-containing luminescent zone
AssigneeEastman Kodak Company
InventorsRobert J. Perry, Ching W. Tang
Life of this patent
Estimating the term…
Abstract
An electroluminescent device having a luminescent zone of less than one millimicron (.mu.m) in thickness comprised of an organic host material capable of sustaining hole-electron recombination. The hole-transporting agent is a silazane.
Claims20
An electroluminescent device comprising in sequence, an anode, an organic hole injecting and transporting zone, an electron injecting and transporting zone, and a cathode;
- characterized in that said organic hole injecting and transporting zone is comprised of (a) a layer in contact with said anode containing a hole injecting porphyrinic compound and (b) a layer containing a hole transporting silazane, interposed between said hole injecting layer and said electron injecting and transporting zone.
An electroluminescent device comprising in sequence.
- an anode,
- a hole injecting layer comprised of a porphyrinic compound,
- a hole transporting layer comprised of an cyclodisilazane,
- an electron injecting and transporting layer comprised of a chelated oxinoid compound, and
- a cathode comprised of a layer consisting essentially of a plurality of metals other than alkali metals, at least one of said metals having work function greater than 4 eV.
2 more elements
Cyclodisilazane having the formula:
- ##STR22## wherein each Ar is an aryl radical having from 6 to about 14 carbon atoms, x is a whole number selected from 0 and 1, and R, R.sup.1, and R.sup.2 are alkyl or aryl radicals having up to about 14 carbon atoms, preferably Ar is a phenyl radical, each x is equal to 1, each R is a phenyl radical, and R.sup.1 and R.sup.2 are selected from methyl and phenyl radicals.
Dependencies are inferred from the claim text.