Light-emitting device with water-and/or oxygen-absorbing layer and its production

• US 7,622,862 B2
• Filed: 08/14/2003
• Issued: 11/24/2009
• Est. Priority Date: 08/14/2002
• Status: Expired due to Term

• Current Assignee: UDC Ireland Limited (Universal Display Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Mishima, Masayuki
• Primary Examiner(s): Ton; Toan
• Assistant Examiner(s): QUARTERMAN, KEVIN J
• Application Number:
  US10/640,670
• Publication Number:
  US 20040046496A1
• Time in Patent Office: 2,294 Days
• Field of Search: 313/504, 313/498, 313/502, 313/506, 313/512, 428/690, 428/917
• US Class Current: 313/506
• CPC Class Codes: H10K 50/8445 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 71/50 Forming devices by joining two substrates together, e.g. lamination techniques
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: H10K 85/10 Organic polymers or oligomers
• CPC Class Codes: H10K 85/111 comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
• CPC Class Codes: H10K 85/631 Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
• CPC Class Codes: H10K 85/649 Aromatic compounds comprising a hetero atom
• CPC Class Codes: Y02E 10/549 Organic PV cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A light-emitting device comprises a laminate structure having an anode substrate, an anode, at least one organic layer comprising a light-emitting layer, a cathode and a cathode substrate in this order, wherein a water- and/or oxygen-absorbing layer is located between the cathode substrate and the cathode.

Claims

1. A light-emitting device comprising in order an anode substrate, an anode, at least one organic layer comprising a light-emitting layer and further comprising at least one polymer, a cathode, at least one water- and oxygen-absorbing layer having a thickness in the range 10 nm to 1 μ

m and consisting essentially of a reducing metal oxide, and a cathode substrate, wherein said water- and oxygen-absorbing layer is formed directly adjacent to said cathode, wherein the reducing metal oxide is an oxide in which an atom bonded to oxygen has a smaller oxidation number than its valency.

2. The light-emitting device of claim 1, wherein the reducing metal oxide is at least one selected from the group consisting of SiO, GeO, SnO, FeO, MnO and WO.

3. The light-emitting device of claim 2, wherein the reducing metal oxide is at least one selected from the group consisting of SiO, GeO, SnO and FeO.

4. The light-emitting device of claim 1, wherein at least one water- and oxygen-absorbing layer has a thickness in the range 50 nm to 500 nm.

5. The light-emitting device of claim 1, wherein at least one water- and oxygen-absorbing layer is composed of a plurality of layers.

6. The light-emitting device of claim 1, wherein said at least one water- and oxygen-absorbing layer is formed by a vapor deposition method or a sputtering method.

7. The light-emitting device of claim 1, wherein said at least one water- and oxygen-absorbing layer comprises a single layer of silicon oxide having a thickness of 0.1 μ

m.

8. The light-emitting device of claim 7, wherein said cathode is a 0.2-μ

m-thick layer of aluminum deposited directly on said silicon oxide layer.

9. A light-emitting device comprising in order an anode substrate, an anode, at least one organic layer comprising a light-emitting layer and further comprising at least one polymer, a cathode, at least one water- and oxygen-absorbing layer consisting of a reducing metal oxide and having a thickness in the range 10 nm to 1 μ

m, and a cathode substrate, wherein said water- and oxygen-absorbing layer is formed directly adjacent to said cathode, wherein the reducing metal oxide is an oxide in which an atom bonded to oxygen has a smaller oxidation number than its valency.

10. A light-emitting device comprising in order an anode substrate, an anode, at least one organic layer comprising a light-emitting layer and further comprising at least one polymer, a cathode, at least one water- and oxygen-absorbing layer comprising a reducing metal oxide and having a thickness in the range 10 nm to 1 μ

m, and a cathode substrate, wherein said water- and oxygen-absorbing layer is formed directly adjacent to said cathode, wherein the reducing metal oxide is an oxide in which an atom bonded to oxygen has a smaller oxidation number than its valency.