Organic electroluminescent device and manufacturing method thereof

• US 20040056266A1
• Filed: 02/21/2003
• Published: 03/25/2004
• Est. Priority Date: 09/19/2002
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung SDI Company Limited
• Inventors: Kim, Mu-Hyun, Chin, Byung Doo, Suh, Min Chul, Chung, Junhyo
• Granted Patent: US 7,170,086 B2
• Time in Patent Office: Days
• US Class Current: 257/99
• CPC Class Codes: H10K 50/14 Carrier transporting layers
• CPC Class Codes: H10K 50/18 Carrier blocking layers
• CPC Class Codes: H10K 50/82 Cathodes
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/8052 Cathodes
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 85/1135 Polyethylene dioxythiophene [PEDOT]; Derivatives thereof
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/60 Organic compounds having low molecular weight H10K85/10 - H10K85/50 take precedence
• CPC Class Codes: H10K 85/621 Aromatic anhydride or imide compounds, e.g. perylene tetra-carboxylic dianhydride or perylene tetracarboxylic di-imide
• CPC Class Codes: H10K 85/649 Aromatic compounds comprising a hetero atom
• CPC Class Codes: H10K 85/6565 Oxadiazole compounds
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
• CPC Class Codes: Y10T 428/31678 Of metal

Abstract

An organic electroluminescent (EL) device includes a substrate, a first electrode disposed on the substrate, an emission layer comprising a polymer disposed on the first electrode, a second electrode formed on the emission layer, and a metal infiltration preventing layer, formed between the emission layer and the second electrode, for preventing a second electrode forming metal from infiltrating into the emission layer. A manufacturing method includes operations to prepare the EL device.

Claims

14. A method for manufacturing an organic EL device, comprising:

forming a first electrode on a substrate;

forming an emission layer comprising a polymer on the first electrode;

forming a metal infiltration preventing layer on the emission layer; and

forming a second electrode on the metal infiltration preventing layer.

15. The method according to claim 14, further comprising forming a hole injection layer between the first electrode and the emission layer after forming the first electrode and before forming the emission layer.

16. The method according to claim 15, wherein the hole injection layer is formed by spin-coating a hole injection layer forming composition and annealing at 100 to 200°

C.

17. The method according to claim 15, further comprising forming an organic soluble hole transport layer between the hole injection layer and the emission layer.

18. The method according to claim 14, wherein the metal infiltration preventing layer is formed by spin-coating or deposition.

19-1. An electronic device having a display comprising an organic EL device in accordance with claim 1.

20-2. The electronic device of claim 19 wherein the electronic device is one of a pager, a cellular telephone, a portable telephone, a two-way radio, a video game, a portable digital assistant, a portable television, a portable computer, a notebook computer, a calculator, a computer, a telephone, a check-out device that registers purchases, a monitoring device, and a digital clock.