Voltage-operated layered arrangement

• US 7,982,214 B2
• Filed: 12/07/2007
• Issued: 07/19/2011
• Est. Priority Date: 12/12/2006
• Status: Active Grant

• Current Assignee: Beijing Xiaomi Mobile Software Co., Ltd. (Xiaomi Corp.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Boerner, Herbert Friedrich, Loebl, Hans-Peter
• Primary Examiner(s): LEBENTRITT, MICHAEL
• Application Number:
  US12/517,808
• Publication Number:
  US 20100327309A1
• Time in Patent Office: 1,320 Days
• Field of Search: 257/40, 257/43, 257/79, 257/89, 257/98, 257/99, 257/103, 257/189, 257/E21.102, 257/25.008, 257/31.125, 257/33, 257/4, 257/51.001, 257/18, 257/22, 438/57, 438/63, 438/82
• US Class Current: 257/40
• CPC Class Codes: H05B 33/22 characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/88 Terminals, e.g. bond pads

Abstract

A voltage-operated layered arrangement comprising a substrate (1), a layered structure (2, 3, 4, 5) that is applied to the substrate and that comprises at least one electrically conductive functional layer (3) arranged between a first electrode (2) and a second electrode (4), and a field-degrading layer (5) that is less electrically conductive than the functional layer (3) and that is applied to the second electrode (4) arranged on the side of the layered structure remote from the substrate in such a way that it covers the second electrode (4) at least in the region of an edge (4a) and connects the second electrode (4) to the first electrode (2) electrically.

Claims

1. A voltage-operated layered arrangement comprising

a substrate (1),

a layered structure (2, 3, 4, 5) that is applied to the substrate and that comprises at least one electrically conductive functional layer (3) arranged between a first electrode (2) and a second electrode (4), and

a field-degrading layer (5) that is less electrically conductive than the functional layer (3) and that is applied to the second electrode (4) arranged on the side of the layered structure remote from the substrate in such a way that it covers the second electrode (4) at least in the region of an edge (4a) and connects the second electrode (4) to the first electrode (2) electrically.

2. A voltage-operated layered arrangement as claimed in claim 1, wherein the functional layer comprises at least one electroluminescent layer.

3. A voltage-operated layered arrangement as claimed in claim 2, wherein the electroluminescent layer comprises an organic electroluminescent material.

4. A voltage-operated layered arrangement as claimed in claim 1, wherein the field-degrading layer has an electrical resistance of between 1 Ω

cm and 10⁸ Ω

cm.

5. A voltage-operated layered arrangement as claimed in claim 1, wherein the thickness of the field-degrading layer is less than 200 nm.

6. A voltage-operated layered arrangement as claimed in claim 4, wherein the field-degrading layer comprises at least one material selected from the group consisting of:

the inorganic semiconductors, the organic conductive polymers and the small conductive organic molecules.

7. A voltage-operated layered arrangement as claimed in claim 6, wherein the inorganic semiconductor is sub-stoichiometric SiN_x where 0.1<

x<

0.8, titanium oxinitride, or non-stoichiometric TiO_y where 0<

y<

2.

8. A voltage-operated layered arrangement as claimed in claim 6, wherein the organic conductive polymers are doped PDOT, PANI or polyaniline.

9. A voltage-operated layered arrangement as claimed in claim 6, wherein the small conductive organic molecules comprise at least one material selected from the group consisting of:

MTDATA doped with F4TCNQ, vanadyl phthalocyanine doped with F4TCNQ, C60 fullerene doped with LVC and C60 fullerene doped with pyB.

10. A method of producing a voltage-operated layered arrangement as claimed in claim 1, comprising the steps of

applying a first electrode (2),

applying an electrically conductive functional layer (3),

applying a second electrode (4),

applying a field-degrading layer (5) to cover the second electrode (4) at least in the region of an edge (4a) and to make electrical contact with the first electrode (2).