Organic light emitting device having a current self-limiting structure
AssigneeAgilent Technologies, Inc.
InventorsDaniel B. Roitman, Ronald L. Moon, Homer Antoniadis, James R. Sheats
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Abstract
An organic light emitting device having a process compatible current self-limiting (CSL) structure applied in the vicinity of an electrode of the device prevents the occurrence of high current flow in the vicinity of a short within the device. Should a short occur, the CSL structure becomes resistive, or non-conducting in the vicinity of the short, thus preventing the occurrence of “runaway” current in the vicinity of the short. By limiting the current flow between conductors in the device, the non-emissive areas of the device can be minimized, thus improving the overall reliability of the device.
Claims19
An organic light emitting device, comprising:
- an electrode;
- a transparent current self-limiting structure comprising an anisotropic film, said current self-limiting structure comprising conducting regions, said conducting regions comprising a unitary material dispersed in a non-conducting matrix, said current self-limiting structure located between said electrode and a bus layer;
- and
- an organic stack located adjacent said electrode and separated from said current self-limiting structure by said electrode.
A method for increasing the reliability of an organic light emitting device, comprising the steps of:
- forming an organic light emitting device including an organic stack;
- and
- incorporating a transparent current self-limiting structure comprising an anisotropic film, said current self-limiting structure comprising conducting regions, said conducting regions comprising a unitary material dispersed in a non-conducting matrix within said organic light emitting device, said current self-limiting structure residing between an electrode and a bus layer, and wherein said current self-limiting is separated from said organic stack by said electrode.
Dependencies are inferred from the claim text.