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US 7,352,125 B2Granted
Organic light emitting devices with hole impeding materials
AssigneeLG.Philips LCD Co., Ltd.
InventorsHany Aziz, Zoran D. Popovic, Nan-Xing Hu
Life of this patent
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Abstract
An organic electroluminescent device includes an anode, a cathode, and a light emitting zone including a hole transport region and an electron transport region. The hole transport region include a hole impeding material located non-adjacent the anode.
Claims18
An organic electroluminescent device comprising:
- an anode,
- a cathode, and
- a light emitting zone including a hole transport region and an electron transport region, wherein the hole transport region includes at least one hole impeding material located non-adjacent the anode and within the hole transport region.
Dependencies are inferred from the claim text.