CN2323468Y - Voltage controlled color organic electro-luminescent device - Google Patents
Voltage controlled color organic electro-luminescent device Download PDFInfo
- Publication number
- CN2323468Y CN2323468Y CN97246536U CN97246536U CN2323468Y CN 2323468 Y CN2323468 Y CN 2323468Y CN 97246536 U CN97246536 U CN 97246536U CN 97246536 U CN97246536 U CN 97246536U CN 2323468 Y CN2323468 Y CN 2323468Y
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- voltage
- color
- complex
- luminescent layer
- luminescent
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- Luminescent Compositions (AREA)
Abstract
The utility model provides a voltage controlled color organic electroluminescent device. The luminescent color of the utility model is changed with the voltage under the driving of a direct current voltage. The utility model emits one kind of spectral band light corresponding to one color under low voltage, and emits another kind of spectral band light corresponding to another color under high voltage, wherein, the light contains at least one kind of spectral component emitted by rare earth narrowband (10-20m). The luminescent color under the intermediate voltage between the low voltage and the high voltage is formed by the superposition of two kinds of emitting spectral components. Because the voltage controlled color OEL luminescent device has one color spectrum which is narrowband emission, colors are easy to distinguish, which has important significance for making multi-color flat plate display devices.
Description
The utility model belongs to the low pressure technical field of organic electroluminescence.
(C.W.Tang andS.A.VangSIyke since U.S. C.W.Tang1987 delivers low pressure organic electroluminescent (OEL) paper, Appl.Phys.Lett, 51 (1987) 913), the development in this field is very fast, but the OEL emission spectrum majority of report is a broad band (halfwidth: 100-200nm) at present, and the OEL of these broadband emission can not well satisfy the colored requirement that shows, so people are in the narrow emission of pursuit OEL device of trying every possible means, wherein rare earth ion f-f electron transition emission band half width very narrow (10-20nm) can satisfy this requirement.Although Japanese Kido people once reported excessive brightness rare earth OEL emission (J.Kiod and K.Nagai, J.Alloys andCompds, 192 (1993) 30.J.Kido, H.Hayase, K.Hongwa K.Nagai and K.Okuyama, Appl.Phys.Lett.65 (1994) 2124), but do not report the relevant variable color luminescent device that contains the organic electroluminescent of rare earth narrow emission.
The design's purpose provides a kind of organic electroluminescence device of color change with voltage.
The design's device is under direct voltage drive, its glow color changes along with the change of voltage, promptly under low-voltage, launch a kind of corresponding a kind of color of light of bands of a spectrum, under high voltage, launch another kind of bands of a spectrum, the light of corresponding another kind of color then, wherein, containing the spectral component of a kind of rare earth arrowband (10-20m) emission at least, is to form by becoming two kinds of emission spectrum composition superpositions at its glow color under the intermediate voltage of high and low voltage.Therefore, this color change with voltage OEL luminescent device is a narrow emission owing to a kind of spectrum of color has been arranged, thereby makes that color is easy to differentiate, and this has important meaning to making the polychrome flat-panel display device.
The design's main contents and technical characterictic are as follows:
The design's color change with voltage organic electroluminescence device, comprise transparent anode (2), hole transmission layer (3), luminescent layer (4) and (5) and metallic cathode (6), it is characterized in that layer of transparent anode (2) is arranged on glass substrate (1), between transparent anode (2) and metallic cathode (6), be followed successively by hole transmission layer (3), with steaming europium complex luminescent layer (4) and the terbium coordination compound luminescent layer (5) that empty evaporation forms, just connecting transparent anode (2) by metallic cathode (6) by negative sense and passing to the direct current formation.
The luminescent layer europium complex can be one of in europium and two-element match and the ternary complex, but one of them must be a beta-diketonate ligand, if ternary complex, second part should be nitrogenous part, also can be oxygen containing part, as: Eu (TTA)
3Phen, Eu (TTA)
3(TPPO)
2, Eu (DBM)
3Phen, Eu (DBM)
3(TPPO)
2, Eu (TTA)
4[N
+(C
4H
6)
4], Eu (DBM)
4[{ C
6H
5N
+CH
2(CH
2)
14CH
3] etc.
The terbium coordination compound of luminescent layer (5) can be one of in 1. terbiums and micromolecular two-element match and the ternary complex, but one of them must be a pentanedione, as Tb (ACA)
3, Tb (AcA)
3Phen; 2. the high molecular complex of terbium and acetyl-containing acetone functional group; 3. the complex of terbium and pentanedione and macromolecule mixed ligand.
In following formula: AcA is a pentanedione, and phen is a Phen, and TTA is α-thienyl acetyl trifluoroacetone, and DBM is a dibenzoyl methane, and TPPO is the hydrogenation triphenyl phosphorus, N
+(C
4H
6)
4Be four hexyl ammonium ions.
Be mainly Eu during low-voltage driving
3+Emission spectrum is mainly Tb during high pressure
3+Emission spectrum is Eu during intermediate voltage
3+And Tb
3+The superposition spectrum of emission.
Now in conjunction with the accompanying drawings and embodiments the design is further described.
Accompanying drawing 1 is the design's device architecture schematic diagram, 1 glass substrate, 2 transparent anodes, 3 hole transmission layers, 4 europium complex luminescent layers, 5 terbium coordination compound luminescent layers, 6 metallic cathodes among the figure.
Embodiment: at glass substrate 1 surperficial coated SnO
2The ITO electrode 2 of-InO, resistance are 30 Ω/, form one deck hole transmission layer at the ITO electrode surface with whirl coating, and material is a polyethylene base carbazole, and thickness is nm, and vacuum vapor deposition method forms europium complex and terbium coordination compound layer, and material is respectively Eu (TTA)
3Phen and Tb (AcA)
3Phen, thickness are respectively nm and nm, form the Al metallic cathode with whirl coating at last, and thickness is nm.Under 5V, 10V, 15V direct voltage, can obtain red, yellow, green glow color respectively.
Claims (2)
1, a kind of color change with voltage organic electroluminescence device, comprise transparent anode (2), hole transmission layer (3), luminescent layer (4) and (5) and metallic cathode (6), it is characterized in that layer of transparent anode (2) is arranged on glass substrate (1), between transparent anode (2) and metallic cathode (6), be followed successively by hole transmission layer (3), with steaming europium complex luminescent layer (4) and the terbium coordination compound luminescent layer (5) that empty evaporation forms, just connecting transparent anode (2) by metallic cathode (6) by negative sense and passing to the direct current formation.
2, according to the electroluminescent device of claim 1, the europium complex that it is characterized in that luminescent layer (4), can be one of in europium and two-element match and the ternary complex, but one of them must be a beta-diketonate ligand, if ternary complex, second part should be nitrogenous part, also can be oxygen containing part, as: Eu (TTA)
3Phen, Eu (TTA)
3(TPPO)
2, Eu (DBM)
3Phen, Eu (DBM)
3(TPPO)
2, Eu (TTA)
4[N
+(C
4H
6)
4], Eu (DBM)
4[{ C
6H
6) N
+GH
2(CH
2)
14CH
3] etc.
The terbium coordination compound of luminescent layer (5) can be one of in 1. terbiums and micromolecular two-element match and the ternary complex, but one of them must be a pentanedione, as Tb (AcA)
3, Tb (AcA)
3Phen; 2. the high molecular complex of terbium and acetyl-containing acetone functional group; 3. the complex of terbium and pentanedione and macromolecule mixed ligand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97246536U CN2323468Y (en) | 1997-12-27 | 1997-12-27 | Voltage controlled color organic electro-luminescent device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97246536U CN2323468Y (en) | 1997-12-27 | 1997-12-27 | Voltage controlled color organic electro-luminescent device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2323468Y true CN2323468Y (en) | 1999-06-09 |
Family
ID=33954706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97246536U Expired - Fee Related CN2323468Y (en) | 1997-12-27 | 1997-12-27 | Voltage controlled color organic electro-luminescent device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2323468Y (en) |
-
1997
- 1997-12-27 CN CN97246536U patent/CN2323468Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |