CN104362254A - Organic light emitting device with composite hole-injection layer - Google Patents
Organic light emitting device with composite hole-injection layer Download PDFInfo
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- CN104362254A CN104362254A CN201410543184.6A CN201410543184A CN104362254A CN 104362254 A CN104362254 A CN 104362254A CN 201410543184 A CN201410543184 A CN 201410543184A CN 104362254 A CN104362254 A CN 104362254A
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- compound
- layer
- injection layer
- hole
- hole injection
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/17—Carrier injection layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/302—Details of OLEDs of OLED structures
Abstract
The invention relates to an organic light emitting device with a composite hole-injection layer. The organic light emitting device comprises a substrate (1), an anode, the composite hole-injection layer (3), a hole transmission layer (4), a light emitting layer (5), an electron injection layer (6) and a cathode (7), wherein the substrate (1) functions in supporting, the anode (2) is used for hole injection and electric contact, the composite hole-injection layer (3) is used for improving hole injection, the hole transmission layer (4) is used for hole transmission, the light emitting layer (5) is used for emitting light, the electron injection layer (6) is used for improving electron injection, and the cathode (7) is used for electron injection and electric contact. The disclosed organic light emitting device with the composite hole-injection layer is applied to emitting light, displaying and illuminating.
Description
Technical field
The present invention relates to one and there is compound hole injection layer organic luminescent device, belong to technical field of organic electroluminescence.
Background technology
Organic luminescent device (Organic Light Emitting Diode, Organic Light-emitting diodes, be called for short OLEDs) as a kind of novel flat-panel monitor and light source, have many advantages such as active illuminating, wide viewing angle, full color, flexible, high efficiency, low-power consumption, low cost concurrently, this technical field major progress is as follows:
1,1987, the people such as Tang report adopt prepared by vacuum thermal evaporation film plating process, be hole transmission layer with amine derivant, with oxine aluminium (Alq
3) be the double-decker OLEDs (C.W.Tang and S.A.VanSlyke, Appl.Phys.Lett.51,913,1987) of luminescent layer.
2,1996, the people such as VanSlyke report and adopt CuPc (CuPc) to improve result of study (S.A.VanSlyke, C.H.Chen and C.W.Tang, the Appl.Phys.Lett.69 of the injection of OLEDs hole and working life as hole injection layer, 2160,1996).
3,1996, the people such as Tokito reported and adopt molybdenum oxide (MoO
3) OLEDs of hole injection layer, find the MoO of suitable thickness
3hole injection layer significantly can reduce the driving voltage (S.Tokito, K.Noda and Y.Taga, J.Phys.D 29,2750,1996) of OLEDs;
4, calendar year 2001, the people such as Zhou Xiang report and adopt F
4-TCNQ doping amine derivant (TDATA) significantly can improve OLEDs hole as hole injection layer and injects and reduce OLEDs driving voltage (X.Zhou, M.Pfeiffer, J.Blochwitz, A.Werner, A.Nollau, T.Fritz and K.Leo, Appl.Phys.Lett.78,410,2001).
5,2006, the people such as Ikeda reported and adopt MoO
3the OLEDs of doping amine derivant (NPB) hole injection layer, finds MoO
3doping amine derivant (NPB) hole injection layer significantly can reduce driving voltage (H.Ikeda, J.Sakata, the M.Hayakawa of OLEDs, T.Aoyama, T.Kawakami, K.Kamata, Y.Iwaki, S.Seo, Y.Noda, R.Nomura, S.Yamazaki, SID 06DIGEST P-185,923,2006).
Summary of the invention
The present invention proposes a kind of organic luminescent device with compound hole injection layer, by for passive substrate (1), for hole inject contact with electricity anode (2), for improve inject in hole compound hole injection layer (3), the hole transmission layer (4) for hole transport, the luminescent layer (5) for luminescence, form successively for the electron injecting layer (6) improving electron injection, the negative electrode (7) that contacts with electricity for electron injection.The invention discloses a kind of organic luminescent device with compound hole injection layer, can be applicable to luminescence, display and illumination.
1. there is a compound hole injection layer organic luminescent device, it is characterized in that: by for passive substrate (1), for hole inject contact with electricity anode (2), for improve inject in hole compound hole injection layer (3), the hole transmission layer (4) for hole transport, the luminescent layer (5) for luminescence, form successively for the electron injecting layer (6) improving electron injection, the negative electrode (7) that contacts with electricity for electron injection.
2. according to claim 1 have compound hole injection layer organic luminescent device, it is characterized in that: described compound hole injection layer (3) thickness range injected for improving hole is 0.1 nanometer-1 millimeter.
3, according to claim 1 have compound hole injection layer organic luminescent device, it is characterized in that: the described compound hole injection layer (3) injected for improving hole is sandwich construction, wherein every layer can by one-component or multicomponent be inorganic or organic material is formed, including, but not limited to various simple substance, compound and compound thereof or composite material, the compound formed as organic molecule, polymer, halogen compound, chalcogenide, nitrogen group compound, carbon group compound or above-mentioned material or composite material etc.
4, according to claim 1 have compound hole injection layer organic luminescent device, it is characterized in that: described compound hole injection layer (3) sandwich construction injected for improving hole can adopt including, but not limited to the films such as vacuum thermal evaporation, electron beam evaporation, laser flash distillation, sputtering or molecular beam epitaxy or the preparation of thin layer dry preparation process, also can adopt including, but not limited to the films such as spin coating, casting, lift, printing, precipitation or the preparation of thin layer wet method preparation process; Wherein each layer can adopt a kind of method to prepare, and also can distinct methods be adopted respectively to prepare.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, its detailed technological means, can be implemented according to the content of specification.In order to feature of the present invention can be become apparent, below especially exemplified by specific implementation method, and accompanying drawing is coordinated to be described in detail, as follows.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention has compound hole injection layer organic luminescent device.
In Fig. 1, the organic luminescent device that the present invention is a kind of has a compound hole injection layer by for passive substrate (1), for hole inject contact with electricity anode (2), for improve inject in hole compound hole injection layer (3), the hole transmission layer (4) for hole transport, the luminescent layer (5) for luminescence, form successively for the electron injecting layer (6) improving electron injection, the negative electrode (7) that contacts with electricity for electron injection.
In Fig. 1, substrate (1) thickness is 1 micron-1 centimetre; There is comparatively high permeability in visible-range; Can be single or multiple lift structure, wherein every layer can be made up of one-component or multicomponent; Can be rigidity or flexibility; Can be made up of inorganic or organic material, including, but not limited to various simple substance, compound and compound thereof or composite material, the compound formed as glass, plastics, metal, organic molecule, polymer, halogen compound, chalcogenide, nitrogen group compound, carbon group compound or above-mentioned material or composite material etc.
In Fig. 1, anode (2) thickness is 0.1 nanometer-1 millimeter; Conduction is also transparent in visible-range; Can be single or multiple lift structure, wherein every layer can be made up of one-component or multicomponent; Can be made up of inorganic or organic material, including, but not limited to various simple substance, compound and compound thereof or composite material, as the organic molecule of the compound of indium tin oxide (ITO), other conductive, transparent, conductive, transparent, conductive, transparent polymer, conduct electricity compound that translucent metal or above-mentioned material form or composite material etc.
In Fig. 1, compound hole injection layer (3) thickness range is 0.1 nanometer-1 millimeter; For sandwich construction, wherein every layer can be made up of one-component or multicomponent; Can be made up of inorganic or organic material, including, but not limited to various simple substance, compound and compound thereof or composite material, the compound formed as organic molecule, polymer, halogen compound, chalcogenide, nitrogen group compound, carbon group compound or above-mentioned material or composite material etc.
In Fig. 1, hole transmission layer (4) thickness is 0.1 nanometer-1 millimeter; Can be single or multiple lift structure, wherein every layer can be made up of one-component or multicomponent; Can be made up of inorganic or organic material, including, but not limited to various simple substance, compound and compound thereof or composite material, the compound formed as organic molecule, polymer, halogen compound, chalcogenide, nitrogen group compound, carbon group compound or above-mentioned material or composite material etc.
In Fig. 1, organic material luminescent layer (5) thickness is 0.1 nanometer-1 millimeter; Can be single or multiple lift structure, wherein every layer can be made up of one-component or multicomponent; Can be made up of the inorganic of luminescence or organic fluorescence or phosphor material; Including, but not limited to various simple substance, compound and compound thereof or composite material, the compound formed as the organic molecule of the inorganic of various luminescence or organic fluorescence or phosphor material and doping thereof, polymer, halogen compound, chalcogenide, nitrogen group compound, carbon group compound or above-mentioned material or composite material etc.
In Fig. 1, electron injecting layer (6) thickness is 0.1 nanometer-1 millimeter; Can be single or multiple lift structure, wherein every layer can be made up of one-component or multicomponent; Can be made up of inorganic or organic material, including, but not limited to various simple substance, compound and compound thereof or composite material, the compound formed as organic molecule, polymer, halogen compound, chalcogenide, nitrogen group compound, carbon group compound or above-mentioned material or composite material etc.
In Fig. 1, negative electrode (7) thickness is 0.1 nanometer-1 millimeter; Conduction also has high reflectance in visible-range; Can be single or multiple lift structure, wherein every layer can be made up of one-component or multicomponent; Can be made up of inorganic or organic material, including, but not limited to various simple substance, compound and compound thereof or composite material, the compound formed as the chalcogenide of metal, conduction, the organic molecule of conduction, the polymer of conduction or above-mentioned material or composite material.
Fig. 2 is a kind of structural representation with the organic luminescent device of compound hole injection layer in specific implementation method of the present invention.
In Fig. 2, the glass that substrate (1) is about 1 millimeter by thickness is formed, in visible-range, have high permeability.
In Fig. 2, the electrically conducting transparent ITO that anode (2) is about 180 nanometers by thickness is formed, in visible-range, have high permeability.
In Fig. 2, compound hole injection layer (3) is double-decker, and ground floor is about the MoO of 1 nanometer by thickness
3form; The second layer is the MoO that thickness is about 19 nanometers
3doping NPB is formed.
In Fig. 2, the NPB that hole transmission layer (4) is about 20 nanometers by thickness is formed.
In Fig. 2, luminescent layer (5) is about the machine small molecule fluorescent materials A lq of 60 nanometers by thickness
3form.
In Fig. 2, the LiF that electron injecting layer (6) thickness is about 2 nanometers is formed.
In Fig. 2, negative electrode (7) is about 100 conductive nanos by thickness and the metal A l film in visible-range with high reflectance is formed.
Fig. 3, Fig. 4, Fig. 5 are current-voltage characteristic, luminosity characteristic, the working life characteristics of organic luminescent device in specific implementation method of the present invention respectively.The wherein organic luminescent device characteristic with compound hole injection layer of △ symbology the present invention proposition, symbology prior art device 1 characteristic, zero symbology existing device 2 characteristic,
symbology existing device 3 characteristic.
As shown in Fig. 3, Fig. 4, Fig. 5, the organic luminescent device with compound hole injection layer that the present invention proposes has lower driving voltage, higher luminosity, longer working life than prior art device.What specific embodiment of the invention method had fully demonstrated that the present invention proposes have compound hole injection layer organic luminescent device and prior art device contrasts the novelty, the creativeness and advanced that have.
Embodiment
First, the MoO that the substrate of glass (1) being coated with electrically conducting transparent ITO (thickness is about 180 nanometers) anode (2) on surface adopts the method for vacuum thermal evaporation plated film to prepare thickness to be about 1 nanometer on the surface
3layer, then the MoO adopting the method for coevaporation to prepare thickness to be about 19 nanometers
3doping NPB layer (doping content is about 10%), above-mentioned MoO
3layer and MoO
3doping NPB layer forms double-decker compound hole injection layer (3).
Secondly, the method for vacuum thermal evaporation plated film is adopted to be prepared in the Alq that the surperficial continuous production thickness of above-mentioned double-decker compound hole injection layer (3) is about the NPB hole transmission layer (4) of 20 nanometers, thickness is about 60 nanometers
3the metal A l negative electrode (7) that luminescent layer (5), thickness are about the LiF electron injecting layer (6) of 2 nanometers, thickness is about 100 nanometers.
Have compound hole injection layer OLED structure in specific implementation method of the present invention as shown in Figure 2, concrete device architecture is: glass/ITO (180nm)/MoO
3(1nm)/MoO
3doping NPB (10%, 19nm)/NPB (20nm)/Alq
3(60nm)/LiF (2nm)/Al (100nm).
For have compound hole injection layer organic luminescent device and the prior art device that embody that the present invention proposes contrast the novelty, the creativeness and advanced that have.The method of vacuum thermal evaporation plated film is adopted to prepare prior art device as follows:
Prior art device 1 does not have hole injection layer, and concrete device architecture is: glass/ITO (180nm)/NPB (40nm)/Alq
3(60nm)/LiF (2nm)/Al (100nm).
Prior art device 2 has the MoO that thickness is about 1 nanometer
3individual layer hole injection layer, concrete device architecture is: glass/ITO (180nm)/MoO
3(1nm)/NPB (39nm)/Alq
3(60nm)/LiF (2nm)/Al (100nm).
Prior art device 3 has the MoO that thickness is about 20 nanometers
3doping NPB (doping content is about 10%) individual layer hole injection layer, concrete device architecture is: glass/ITO (180nm)/MoO
3doping NPB (10%, 20nm)/NPB (20nm)/Alq
3(60nm)/LiF (2nm)/Al (100nm).
Above-mentioned organic luminescent device is prepared all under substantially the same conditions and is tested, organic luminescent device prepares un-encapsulated and directly tests in atmosphere at room temperature environment, Keithley 236 source measuring unit is adopted to measure organic luminescent device current-voltage characteristic, the brightness of the ST-86LA screen intensity measurement amount organic luminescent device adopting photoelectric instrument factory of Beijing Normal University to produce.
Fig. 3, Fig. 4, Fig. 5 are current-voltage characteristic, luminosity characteristic, the working life characteristics of organic luminescent device in specific implementation method of the present invention respectively.The wherein organic luminescent device characteristic with compound hole injection layer of △ symbology the present invention proposition, symbology prior art device 1 characteristic, zero symbology existing device 2 characteristic,
symbology existing device 3 characteristic.
As shown in Fig. 3, Fig. 4, Fig. 5, the organic luminescent device with compound hole injection layer that the present invention proposes has lower driving voltage, higher luminosity, longer working life than prior art device.What specific embodiment of the invention method had fully demonstrated that the present invention proposes have compound hole injection layer organic luminescent device and prior art device contrasts the novelty, the creativeness and advanced that have.
In specific implementation method of the present invention, the performance of organic luminescent device is as shown in table 1:
The performance of organic luminescent device in table 1 specific implementation method of the present invention
| Organic luminescent device | Driving voltage (V) | Luminosity (cd/m 2) | Working life (hour) |
| Device of the present invention | 6.2 | 2018 | 0.8 |
| Prior art device 1 | 7.6 | 370 | 0.1 |
| Prior art device 2 | 7.2 | 659 | 0.3 |
| Prior art device 3 | 6.5 | 1430 | 0.5 |
In table 1, the driving voltage corresponding current density of organic luminescent device is 100mA/cm
2, the corresponding driving voltage of luminosity of organic luminescent device is 6V, and the working life of organic luminescent device is that device original intensity (is about 5200cd/m
2) continuous operation reduces to its initial luminous brightness half to its luminosity and (be about 2600cd/m
2) time.
In table 1, the organic luminescent device with compound hole injection layer that the present invention proposes has lower driving voltage, higher luminosity, longer working life than prior art device.What specific embodiment of the invention method had fully demonstrated that the present invention proposes have compound hole injection layer organic luminescent device and prior art device contrasts the novelty, the creativeness and advanced that have.
The technical term mentioned in the present invention is conventionally known to one of skill in the art, the material mentioned in the embodiment of the present invention and english abbreviation thereof and preparation method are conventionally known to one of skill in the art, but those skilled in the art are to be understood that, the present invention not limited by the material described in the present embodiment and preparation method, and the claims in the present invention and summary of the invention summarise scope and spirit of the present invention.
Claims (4)
1. there is a compound hole injection layer organic luminescent device, it is characterized in that: by for passive substrate (1), for hole inject contact with electricity anode (2), for improve inject in hole compound hole injection layer (3), the hole transmission layer (4) for hole transport, the luminescent layer (5) for luminescence, form successively for the electron injecting layer (6) improving electron injection, the negative electrode (7) that contacts with electricity for electron injection.
2. according to claim 1 have compound hole injection layer organic luminescent device, it is characterized in that: described compound hole injection layer (3) thickness range injected for improving hole is 0.1 nanometer-1 millimeter.
3. according to claim 1 have compound hole injection layer organic luminescent device, it is characterized in that: the described compound hole injection layer (3) injected for improving hole is sandwich construction, wherein every layer can by one-component or multicomponent be inorganic or organic material is formed, including, but not limited to various simple substance, compound and compound thereof or composite material, the compound formed as organic molecule, polymer, halogen compound, chalcogenide, nitrogen group compound, carbon group compound or above-mentioned material or composite material etc.
4. according to claim 1 have compound hole injection layer organic luminescent device, it is characterized in that: described compound hole injection layer (3) sandwich construction injected for improving hole can adopt including, but not limited to the films such as vacuum thermal evaporation, electron beam evaporation, laser flash distillation, sputtering or molecular beam epitaxy or the preparation of thin layer dry preparation process, also can adopt including, but not limited to the films such as spin coating, casting, lift, printing, precipitation or the preparation of thin layer wet method preparation process; Wherein each layer can adopt a kind of method to prepare, and also can distinct methods be adopted respectively to prepare.
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|---|---|---|---|
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| CN203288658U (en) * | 2013-04-03 | 2013-11-13 | 云南北方奥雷德光电科技股份有限公司 | Organic illuminating device structure provided with double-layer cavity injection layer |
| US20140077198A1 (en) * | 2012-09-20 | 2014-03-20 | Samsung Display Co., Ltd. | Organic electroluminescence display device |
| US20140246661A1 (en) * | 2008-02-19 | 2014-09-04 | Samsung Display Co., Ltd. | Organic light emitting device |
-
2014
- 2014-09-30 CN CN201410543184.6A patent/CN104362254A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1589073A (en) * | 2004-06-28 | 2005-03-02 | 友达光电股份有限公司 | Organic luminous display element and its producing method |
| US20140246661A1 (en) * | 2008-02-19 | 2014-09-04 | Samsung Display Co., Ltd. | Organic light emitting device |
| CN202145468U (en) * | 2011-05-06 | 2012-02-15 | 京东方科技集团股份有限公司 | Flexible organic electroluminescent device |
| CN102222773A (en) * | 2011-06-02 | 2011-10-19 | 上海大学 | Blue-light organic light emitting device with composite hole injection layer and preparation method of blue-light organic light emitting device |
| WO2013032304A2 (en) * | 2011-09-02 | 2013-03-07 | 주식회사 엘엠에스 | Organic electronic device and method for manufacturing same |
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