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US 2006/0132026 A1Published application
Organic light emitting diode (OLED) having improved stability, luminance, and efficiency
AssigneeHoneywell International Inc.
InventorsKalluri Sarma, Xiaowei Sun, Baijun Chen
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Abstract
An organic light emitting diode (OLED) includes a relatively thin diamnond-like carbon (DLC) layer disposed between the anode and the hole transport layer to improve luminous efficiency and operating life time. The relatively thin DLC layer inhibits hole injection, which balances charge flow and improves efficiency, and increases the surface smoothness of the anode, which contributes to the increased operating life time.
Claims30
An organic light emitting diode, comprising:
- an anode;
- a diamond-like carbon (DLC) layer disposed on the anode, the DLC layer having a thickness less than about 10 nm;
- an organic hole transport layer disposed on the DLC layer;
- an organic emission layer disposed on the hole transport layer;
- and
- a cathode disposed on the organic emission layer.
3 more elements
An organic light emitting diode, comprising:
- a substrate;
- an anode disposed on the substrate;
- a tetrahedral amorphous carbon (ta-C) layer disposed on the anode;
- an organic hole transport layer disposed on the ta-C layer;
- an organic emission layer disposed on the hole transport layer;
- and
- a cathode disposed on the organic emission layer.
4 more elements
Dependencies are inferred from the claim text.