What is claimed is:
1. An organic electroluminescent device comprising:
at least one luminescent layer constituted from an organic compound, the luminescent layer being positioned between a cathode electrode and an anode electrode opposed to the cathode electrode; and
an organic layer positioned adjacent to said cathode electrode,
in which said organic layer is constituted from an organic metal complex compound containing at least one member selected from the group consisting of an alkali metal ion, an alkali earth metal ion and a rare earth metal ion, and
said cathode electrode comprises a metal capable of reducing the metal ion contained in said complex compound, in vacuum, to the corresponding metal.
2. The organic electroluminescent device according to claim 1, in which the metal used in said cathode electrode is any one of aluminum, zirconium, titanium, yttrium, scandium and silicon.
3. The organic electroluminescent device according to claim 1, in which the metal used in said cathode electrode is an alloy containing at least one of aluminum, zirconium, titanium, yttrium, scandium and silicon.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A propeller hub for a turbomachine with variable pitch blades, comprising:
a turbomachine turbine rotor element;
a polygonal ring fixed to the rotor element and including substantially radial cylindrical housings distributed around a central axis of the ring to receive the blades; and
a plurality of backup retaining members connected to the rotor element, each passing radially through the ring through a respective opening in the ring and each backup retaining member including at least one bearing surface opposite an exterior surface of the ring with a radial spacing between the at least one bearing surface and the exterior surface of the ring.
2. The hub as claimed in claim 1, wherein each backup retaining member includes an enlarged head with a bearing surface on each side of the respective opening.
3. The hub as claimed in claim 1, wherein each backup retaining member includes a dovetail-shape base positively interengaged with a respective complementary groove on the rotor element.
4. The hub as claimed in claim 3, wherein the base also includes at least one orifice receiving a bolt for limiting movement of the base relative to the rotor element in the direction of the groove.
5. A propeller including a hub according to claim 1 and blades received in the cylindrical housings.
6. A turbomachine including a propeller as claimed in claim 5.
7. A turbomachine including two contrarotating propellers as claimed in claim 5.