Organic semiconductor element

• US 20030127967A1
• Filed: 12/04/2002
• Published: 07/10/2003
• Est. Priority Date: 12/05/2001
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Seo, Satoshi, Yamazaki, Hiroko, Tsutsui, Tetsuo
• Granted Patent: US 7,956,349 B2
• Time in Patent Office: Days
• US Class Current: 313/498
• 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. An organic semiconductor element comprising:

an organic structure formed by sequentially laminating an n number of functional organic thin film layers (where n is an integer equal to or greater than

     2) comprising a first through an n-th functional organic thin film layers between two electrodes,

wherein a conductive thin film layer is formed between a k-th functional organic thin film layer (where k is an integer of 1≦

k≦

(n−

1)) and a (k+1)th functional organic thin film layer, and

wherein each of the conductive thin film layers ohmically contacts with each of the functional organic thin film layer.

11. An organic semiconductor element according to any one of claims 1 through 4, wherein the functional organic thin film layer comprises a bipolar organic compound.

12. An organic semiconductor element according to any one of claims 1 through 4, wherein:

the functional organic thin film layer has at least one hole transporting layer comprising a hole transporting material, and at least one electron transporting layer comprising an electron transporting material; and

the hole transporting layer is positioned closer to an anode side than the electron transporting layer.

47. Any one of an organic semiconductor element, organic electroluminescent element and an organic solar battery according to any one of claims 1 through 4, 13 through 16, and 30 through 33, wherein a conductivity of the conductive thin film layer is equal to or greater than 10⁻

10 S/m².

48. Any one of an organic semiconductor element, organic electroluminescent element and an organic solar battery according to any one of claims 1 through 4, 13 through 16, and 30 through 33, wherein the conductive thin film layer is in a floating state.

2. An organic semiconductor element comprising:

an organic structure formed by sequentially laminating an n number of functional organic thin film layers (where n is an integer equal to or greater than

     2) comprising a first through an n-th functional organic thin film layers between two electrodes,

wherein a conductive thin film layer which includes an organic compound is formed between a k-th functional organic thin film layer (where k is an integer of 1≦

k≦

(n−

1)) and a (k+1)th functional organic thin film layer, and

wherein each of the conductive thin film layers ohmically contacts with each of the functional organic thin film layer.

3. An organic semiconductor element comprising:

an organic structure formed by sequentially laminating an n number of functional organic thin film layers (where n is an integer equal to or greater than

     2) comprising a first through an n-th functional organic thin film layers between two electrodes,

wherein a conductive thin film layer which includes an organic compound is formed between a k-th functional organic thin film layer (where k is an integer of 1≦

k≦

(n−

1)) and a (k+1)th functional organic thin film layer, and

wherein each of the conductive thin film layers contains at least one of an acceptor and a donor for the organic compound.

5. An organic semiconductor element according to claim 3 or 4, wherein a region of the functional organic thin film layer contacting the conductive thin film layer includes an organic compound that is the same as the organic compound.

4. An organic semiconductor element comprising:

an organic structure formed by sequentially laminating an n number of functional organic thin film layers (where n is an integer equal to or greater than

     2) comprising a first through an n-th functional organic thin film layers between two electrodes,

wherein a conductive thin film layer which includes an organic compound is formed between a k-th functional organic thin film layer (where k is an integer of 1≦

k≦

(n−

1)) and a (k+1)th functional organic thin film layer, and

wherein each of the conductive thin film layers contains both of an acceptor and a donor for the organic compound.

6. An organic semiconductor element according to claim 4, wherein:

the conductive thin film layer is structured by laminating a first layer formed by adding an acceptor to the organic compound, and a second layer is formed by adding a donor to an organic compound that is the same as the organic compound; and

the first layer is positioned closer to a cathode side than the second layer.

7. An organic semiconductor element according to claim 6, wherein a region of the functional organic thin film layer contacting the conductive thin film layer includes an organic compound that is the same as the organic compound.

8. An organic semiconductor element according to claim 4, wherein:

the conductive thin film layer is structured by laminating a first layer formed by adding an acceptor to a first organic compound, and a second layer formed by adding a donor to a second organic compound that is different from the first organic compound; and

the first layer is positioned closer to a cathode side than the second layer.

9. An organic semiconductor element according to claim 8, wherein a region of the functional organic thin film layer contacting the first layer includes an organic compound that is the same as the first organic compound.

10. An organic semiconductor element according to claim 8, wherein a region of the functional organic thin film layer contacting the second layer includes an organic compound that is the same as the second organic compound.

13. An organic electroluminescent element comprising:

an organic structure which emits light by making a current flow therein and is formed by sequentially laminating an n number of functional organic thin film layers (where n is an integer equal to or greater than

     2) comprising a first through an n-th functional organic thin film layers between an anode and a cathode,

wherein a conductive thin film layer is formed between a k-th functional organic thin film layer (where k is an integer of 1≦

k≦

(n−

1)) and a (k+1)th functional organic thin film layer, and

wherein each of the conductive thin film layers ohmically contacts with each of the functional organic thin film layer.

23. An organic electroluminescent element according to any one of claims 13 through 16, wherein the functional organic thin film layer is composed of a bipolar organic compound.

24. An organic electroluminescent element according to any one of claims 13 through 16, wherein:

the functional organic thin film layer has at least one hole transporting layer comprising a hole transporting material, and at least one electron transporting layer comprising an electron transporting material; and

the hole transporting layer is positioned closer to an anode side than the electron transporting layer.

25. An organic electroluminescent element according to claim 23, wherein the bipolar organic compound includes a high molecular compound having a π

-conjugate system.

26. An organic electroluminescent element according to claim 23, wherein:

the bipolar organic compound includes a high molecular compound having π

-conjugate system; and

the conductive thin film layer includes a high molecular compound having a π

-conjugate system.

27. An organic electroluminescent element according to claim 23, wherein:

the bipolar organic compound includes a high molecular compound having a π

-conjugate system, and

the conductive thin film layer includes a conducting high molecular compound with an acceptor or a donor added to it.

28. An organic electroluminescent element according to claim 24, wherein the conductive thin film layer includes at least one of the hole transporting material and the electron transporting material.

29. An organic electroluminescent element according to claim 24, wherein the conductive thin film layer includes both the hole transporting material and the electron transporting material.

14. An organic electroluminescent element comprising:

an organic structure which emits light by making a current flow therein and is formed by sequentially laminating an n number of functional organic thin film layers (where n is an integer equal to or greater than

     2) comprising a first through an n-th functional organic thin film layers between an anode and a cathode,

wherein a conductive thin film layer which includes an organic compound is formed between a k-th functional organic thin film layer (where k is an integer of 1≦

k≦

(n−

1)) and a (k+1)th functional organic thin film layer, and

wherein each of the conductive thin film layers ohmically contacts with each of the functional organic thin film layer.

15. An organic electroluminescent element comprising:

an organic structure which emits light by making a current flow therein and is formed by sequentially laminating an n number of functional organic thin film layers (where n is an integer equal to or greater than

     2) comprising a first through an n-th functional organic thin film layers between an anode and a cathode,

wherein a conductive thin film layer which includes an organic compound is formed between a k-th functional organic thin film layer (where k is an integer of 1≦

k≦

(n−

1)) and a (k+1)th functional organic thin film layer, and

wherein each of the conductive thin film layers contains at least one of an acceptor and a donor for the organic compound.

17. An organic electroluminescent element according to claim 15 or 16, wherein a region of the functional organic thin film layer contacting the conductive thin film layer includes an organic compound that is the same as the organic compound.

16. An organic electroluminescent element comprising:

an organic structure which emits light by making a current flow therein and is formed by sequentially laminating an n number of functional organic thin film layers (where n is an integer equal to or greater than

     2) comprising a first through an n-th functional organic thin film layers between an anode and a cathode,

wherein a conductive thin film layer which includes an organic compound is formed between a k-th functional organic thin film layer (where k is an integer of 1≦

k≦

(n−

1)) and a (k+1)th functional organic thin film layer, and

wherein each of the conductive thin film layers contains both of an acceptor and a donor for the organic compound.

18. An organic electroluminescent element according to claim 16, wherein:

the conductive thin film layer is structured by laminating a first layer formed by adding an acceptor to the organic compound, and a second layer formed by adding a donor to an organic compound that is the same as the organic compound; and

the first layer is positioned closer to a cathode side than the second layer.

19. An organic electroluminescent element according to claim 18, wherein a region of the functional organic thin film layer contacting the conductive thin film layer includes an organic compound that is the same as the organic compound.

20. An organic electroluminescent element according to claim 16, wherein:

the conductive thin film layer is structured by laminating a first layer formed by adding an acceptor to a first organic compound, and a second layer formed by adding a donor to a second organic compound that is different from the first organic compound; and

the first layer is positioned closer to a cathode side than the second layer.

21. An organic electroluminescent element according to claim 20, wherein a region of the functional organic thin film layer contacting the first layer includes an organic compound that is the same as the first organic compound.

22. An organic electroluminescent element according to claim 20, wherein a region of the functional organic thin film layer contacting the second layer includes an organic compound that is the same as the second organic compound.

30. An organic solar battery comprising:

an organic structure which generates an electromotive force by absorbing light and is formed by sequentially laminating an n number of functional organic thin film layers (where n is an integer equal to or greater than

     2) comprising a first through an n-th functional organic thin film layers between two electrodes,

wherein a conductive thin film layer is formed between a k-th functional organic thin film layer (where k is an integer of 1≦

k≦

(n−

1)) and a (k+1)th functional organic thin film layer, and

wherein each of the conductive thin film layers ohmically contacts with each of the functional organic thin film layer.

40. An organic solar battery according to any one of claims 30 through 33, wherein the functional organic thin film layer is composed of a bipolar organic compound.

41. An organic solar battery according to any one of claims 30 through 33, wherein:

the functional organic thin film layer has at least one hole transporting layer comprising a hole transporting material, and at least one electron transporting layer comprising an electron transporting material; and

the hole transporting layer is positioned closer to an anode side than the electron transporting layer.

42. An organic solar battery according to claim 40, wherein the bipolar organic compound includes a high molecular compound having a π

-conjugate system.

43. An organic solar battery according to claim 40, wherein:

the bipolar organic compound includes a high molecular compound having a π

-conjugate system; and

the conductive thin film layer includes a high molecular compound having a π

-conjugate system.

44. An organic solar battery according to claim 40, wherein the bipolar organic compound includes a high molecular compound having a π

-conjugate system, and the conductive thin film layer includes a conducting high molecular compound with an acceptor or a donor added to it.

45. An organic solar battery according to claim 41, wherein the conductive thin film layer includes at least one of the hole transporting material and the electron transporting material.

46. An organic solar battery according to claim 41, wherein the conductive thin film layer includes both the hole transporting material and the electron transporting material.

31. An organic solar battery comprising:

an organic structure which generates an electromotive force by absorbing light and is formed by sequentially laminating an n number of functional organic thin film layers (where n is an integer equal to or greater than

     2) comprising a first through an n-th functional organic thin film layers between two electrodes,

wherein a conductive thin film layer which includes an organic compound is formed between a k-th functional organic thin film layer (where k is an integer of 1≦

k≦

(n−

1)) and a (k+1)th functional organic thin film layer, and

wherein each of the conductive thin film layers ohmically contacts with each of the functional organic thin film layer.

32. An organic solar battery comprising:

an organic structure which generates an electromotive force by absorbing light and is formed by sequentially laminating an n number of functional organic thin film layers (where n is an integer equal to or greater than

     2) comprising a first through an n-th functional organic thin film layers between two electrodes,

wherein a conductive thin film layer which includes an organic compound is formed between a k-th functional organic thin film layer (where k is an integer of 1≦

k≦

(n−

1)) and a (k+1)th functional organic thin film layer, and

wherein each of the conductive thin film layers contains at least one of an acceptor and a donor for the organic compound.

34. An organic solar battery according to claim 32 or 33, wherein a region of the functional organic thin film layer contacting the conductive thin film layer includes an organic compound that is the same as the organic compound.

33. An organic solar battery comprising:

an organic structure which generates an electromotive force by absorbing light and is formed by sequentially laminating an n number of functional organic thin film layers (where n is an integer equal to or greater than

     2) comprising a first through an n-th functional organic thin film layers between two electrodes,

wherein a conductive thin film layer which includes an organic compound is formed between a k-th functional organic thin film layer (where k is an integer of 1≦

k≦

(n−

1)) and a (k+1)th functional organic thin filn layer; and

wherein each of the conductive thin film layers contains both of an acceptor and a donor for the organic compound.

35. An organic solar battery according to claim 33, wherein:

the conductive thin film layer is structured by laminating a first layer formed by adding an acceptor to the organic compound, and a second layer formed by adding a donor to an organic compound that is the same as the organic compound; and

the first layer is positioned closer to a cathode side than the second layer.

36. An organic solar battery according to claim 35, wherein a region of the functional organic thin film layer contacting the conductive thin film layer includes an organic compound that is the same as the organic compound.

37. An organic solar battery according to claim 33, wherein:

the conductive thin film layer is structured by laminating a first layer formed by adding an acceptor to a first organic compound, and a second layer formed by adding a donor to a second organic compound that is different from the first organic compound; and

the first layer is positioned closer to a cathode side than the second layer.

38. An organic solar battery according to claim 37, wherein a region of the functional organic thin film layer contacting the first layer includes an organic compound that is the same as the first organic compound.

39. An organic solar battery according to claim 37, wherein a region of the functional organic thin film layer contacting the second layer includes an organic compound that is the same as the second organic compound.