Anode modification for organic light emitting diodes
AssigneeInternational Business Machines Corporation
InventorsTilman A. Beierlein, Eliav Haskal, Heike Riel, Walter Riess, Paul Seidler, Samuel Clagett Strite, Horst Vestweber
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Abstract
An organic light emitting device is provided which includes a cathode (51), an anode (47, 46, 48), and an organic electroluminescent region (49, 50). The anode includes a metal layer (46), a barrier layer (47), and an anode modification layer (48). Light is emitted through the cathode (51) when a voltage is applied between the anode (47, 46, 48) and the cathode (51).
Claims34
An organic electroluminescent device comprising an anode, a cathode, and an organic region sandwiched between said anode and said cathode, said anode further comprising:
- a metal layer,
- a barrier layer, and
- an anode modification layer,
- wherein said anode is arranged such that said anode modification layer is in contact with said organic region and light is emitted through said cathode.
A display apparatus comprising a substrate and an array of organic electroluminescent devices formed on said substrate, each one of said organic electroluminescent devices comprising an anode, a cathode and an organic region sandwiched between said anode and said cathode, said anode further comprising a metal layer, a barrier layer, and an anode modification layer, wherein said anode is arranged such that said anode modification is in contact with said organic region and light is emitted through said cathode.
A method for making an organic electroluminescent device comprising an anode, a cathode, and an organic region being sandwiched between said anode and said cathode, said method comprising a step of building up said anode prior to the formation of said organic region and cathode, by forming a metal layer, a barrier layer situated on the metal layer, and an anode modification layer situated on the barrier layer,
- said anode being arranged such that said anode modification layer is in contact with said organic region and light is emitted through said cathode.
Dependencies are inferred from the claim text.