Organic semiconductor element

• US 9,312,507 B2
• Filed: 06/01/2011
• Issued: 04/12/2016
• Est. Priority Date: 12/05/2001
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Tsutsui, Tetsuo, Yamazaki, Hiroko, Seo, Satoshi
• Primary Examiner(s): Moore, Whitney T
• Assistant Examiner(s): Wilson, Scott R
• Application Number:
  US13/150,564
• Publication Number:
  US 20110227119A1
• Time in Patent Office: 1,777 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
• CPC Class Codes: H10K 10/701 Organic molecular electronic devices
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 30/20 comprising organic-organic junctions, e.g. donor-acceptor junctions
• CPC Class Codes: H10K 30/211 comprising multiple junctions, e.g. double heterojunctions
• CPC Class Codes: H10K 30/57 comprising multiple junctions, e.g. tandem PV cells
• CPC Class Codes: H10K 39/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic radiation-sensitive element covered by group H10K30/00
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/125 specially adapted for multicolour light emission, e.g. for emitting white light
• CPC Class Codes: H10K 50/13 comprising stacked EL layers within one EL unit
• CPC Class Codes: H10K 50/155 comprising dopants
• CPC Class Codes: H10K 50/165 comprising dopants
• CPC Class Codes: H10K 50/19 Tandem OLEDs
• CPC Class Codes: H10K 59/32 Stacked devices having two or more layers, each emitting at different wavelengths
• CPC Class Codes: H10K 85/30 Coordination compounds
• CPC Class Codes: H10K 85/311 Phthalocyanine
• 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 85/611 Charge transfer complexes
• CPC Class Codes: H10K 85/615 Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
• 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 85/631 : 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: H10K 85/6565 : Oxadiazole compounds
• CPC Class Codes: Y02E 10/50 : Photovoltaic [PV] energy
• 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

By introducing new concepts into a structure of a conventional organic semiconductor element and without using a conventional ultra thin film, an organic semiconductor element is provided which is more reliable and has higher yield. Further, efficiency is improved particularly in a photoelectronic device using an organic semiconductor. Between an anode and a cathode, there is provided an organic structure including alternately laminated organic thin film layer (functional organic thin film layer) realizing various functions by making an SCLC flow, and a conductive thin film layer (ohmic conductive thin film layer) imbued with a dark conductivity by doping it with an acceptor and a donor, or by the like method.

Claims

1. A light-emitting device comprising:

an anode;

a first electroluminescent layer over the anode;

a layer over the first electroluminescent layer, the layer consisting of one of molybdenum oxide, vanadium oxide, and niobium oxide;

a second electroluminescent layer over the layer; and

a cathode over the second electroluminescent layer,

wherein each of the first electroluminescent layer and the second electroluminescent layer comprises a hole transporting layer and an electron transporting layer over the hole transporting layer.

2. The light-emitting device according to claim 1,

wherein the layer consists of molybdenum oxide.

3. The light-emitting device according to claim 1,

wherein the layer consists of vanadium oxide.

4. The light-emitting device according to claim 1,

wherein the light-emitting device is capable of emitting white light.

5. The light-emitting device according to claim 1,

wherein the first electroluminescent layer and the second electroluminescent layer emit light with different color so that the light-emitting device is capable of emitting white light.

6. The light-emitting device according to claim 1,

wherein at least one of the first electroluminescent layer and the second electroluminescent layer emits light from a triplet excited state.

7. A light-emitting device comprising:

an anode;

a first electroluminescent layer over the anode;

a first layer over the first electroluminescent layer, the first layer comprising an electron transporting material and a donor to the electron transporting material;

a second layer over the first layer, the second layer consisting of one of molybdenum oxide, vanadium oxide, and niobium oxide;

a second electroluminescent layer over the second layer; and

a cathode over the second electroluminescent layer,

wherein each of the first electroluminescent layer and the second electroluminescent layer comprises a hole transporting layer and an electron transporting layer over the hole transporting layer.

8. The light-emitting device according to claim 7,

wherein the second layer consists of molybdenum oxide.

9. The light-emitting device according to claim 7,

wherein the second layer consists of vanadium oxide.

10. The light-emitting device according to claim 7,

wherein the donor is selected from an alkali metal and an alkali earth metal.

11. The light-emitting device according to claim 7,

wherein the donor is selected from a Lewis base.

12. The light-emitting device according to claim 7,

wherein the light-emitting device is capable of emitting white light.

13. The light-emitting device according to claim 7,

wherein the first electroluminescent layer and the second electroluminescent layer emit light with different color so that the light-emitting device is capable of emitting white light.

14. The light-emitting device according to claim 7,

wherein at least one of the first electroluminescent layer and the second electroluminescent layer emits light from a triplet excited state.