CN100499201C - Multicolored organic LED - Google Patents
Multicolored organic LED Download PDFInfo
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- CN100499201C CN100499201C CNB2006100520815A CN200610052081A CN100499201C CN 100499201 C CN100499201 C CN 100499201C CN B2006100520815 A CNB2006100520815 A CN B2006100520815A CN 200610052081 A CN200610052081 A CN 200610052081A CN 100499201 C CN100499201 C CN 100499201C
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Abstract
The invention discloses a heterogeneous organic luminous diode, which comprises the following parts: anode, cavity injection layer on the anode, luminous layer on the cavity injection layer and cathode on the luminous layer, wherein the anode is indium tin oxide; the cavity injection layer is PEDOT: PSS; the luminous layer is TTP or TPP doping MEH-PPV at 1-8 percent density; the cathode is aluminum metal. The invention can illuminate red, orange, yellow and green color light, which realizes colorful display of single-layer device.
Description
Technical field
The present invention relates to organic illuminating element, specifically a kind of multicolored organic LED (OLED).
Background technology
The purpose of organic electroluminescent is exactly in order to realize colorful demonstration.Organic Light Emitting Diode (OLED) can send the light of multiple color, still, is that light sent out a kind of by a device under normal conditions.Device for the color that realizes to send out multiple, general way is that the several devices that can send out different colours light are superimposed, realize multicolor displaying by control circuit, or utilize optical filtering that the light of emission band broad is filtered and the device of the color of light that obtains sending out several, and the light that individual devices is sent out different colours be there is no research.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of multicolored organic LED is provided, realize that a device can send out light varicolored.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
A kind of multicolored organic LED comprises anode, is arranged at hole injection layer on the described anode, is arranged at luminescent layer on the described hole injection layer, is arranged at the negative electrode on the described luminescent layer, it is characterized in that:
Described anode is a tin indium oxide;
Described hole injection layer is PEDOT:PSS,
The molecular structural formula of PEDOT is:
The molecular structural formula of PSS is:
Described luminescent layer is TTP or TPP doping MEH-PPV
The molecular structural formula of TTP is:
The molecular structural formula of TPP is:
The molecular structural formula of MEH-PPV is:
Described negative electrode is metallic aluminium or magnesium, calcium, silver, lithium.
The technical scheme that the present invention can also adopt is:
The concentration of described luminescent layer TTP or TPP doping MEH-PPV is 1～8%, is preferably 3%;
The thickness of described hole injection layer rete is 10～30nm;
The thickness of described luminescent layer rete is 80～120nm;
The thickness of described metallic cathode is 80～120nm.
The present invention has taked above-mentioned technical measures, and having made with ITO is anode, and PEDT:PSS is a hole injection layer, the luminescent layer that different quality concentration TTP or TPP doping MEH-PPV make, and metallic aluminium is as the device of the negative electrode of device.Under the different doping contents with different extra electric field under, device can send the light of different colours.Wherein when 3% mixed, along with the rising of voltage, device can send the light of red, orange, yellow, green four kinds of colors, has successfully realized the colorful demonstration of single layer device.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the process chart that the embodiment of the invention prepares multicolored organic LED;
Fig. 3 is the electroluminescent spectrum figure of pure MEH-PPV;
Fig. 4 is the electroluminescent spectrum figure of the device of the embodiment of the invention 1% doping;
Fig. 5 is the electroluminescent spectrum figure of the device of the embodiment of the invention 3% doping;
Fig. 6 is the electroluminescent spectrum figure of the device of the embodiment of the invention 5% doping;
Fig. 7 is the electroluminescent spectrum figure of the device of the embodiment of the invention 8% doping.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
With reference to Fig. 1, the present invention is an anode with indium tin oxide target (ITO), and PEDOT:PSS is a hole injection layer, the luminescent layer that different quality concentration TTP or TPP doping MEH-PPV make, and metallic aluminium or magnesium, calcium, silver, lithium are as the device of the negative electrode of device.Device architecture be ITO/PEDOT:PSS/TTP (wt%) (TPP): MEH-PPV/Al, anode promptly is set on glass substrate, hole injection layer is set on anode, luminescent layer is set on hole injection layer, be to be provided with on the luminescent layer negative electrode.Under the different doping contents with different extra electric field under, device can obtain the luminous of different colours.Wherein when 3% mixed, along with the rising of voltage, device can send the light of red, orange, yellow, green four kinds of colors, has realized the colorful demonstration of single layer device.
General visible spectrum can be divided into redness (640～780nm), orange (600～640nm), yellow (570～600nm), green (490～570nm), cyan (450～490nm), blue (430～450nm) and purple (380～430nm).With reference to Fig. 3, we can see the increase along with voltage from figure, the glow color of device during by 8V yellow (588nm) blue shift to the green (563nm) during 16V.Just because of the blue shift of high polymer MEH-PPV bands of a spectrum, make the multicolor displaying of single layer device become possibility.
With reference to Fig. 4, when 1% mixed, the emission peak at 650nm place was the feature emission peak of porphyrin, and its glow color is red.At 8V, the device luminescent spectrum is the stack of porphyrin (650nm) and MEH-PPV (582nm), shows as orange; Along with the 12V that is increased to of voltage, the emissive porwer of the relative MEH-PPV of porphyrin reduces, and shows as Yellow luminous; The luminous of porphyrin covered by the luminous of MEH-PPV substantially when 18V, shows as green emitting.Therefore, luminously show as: orange-Huang-green with the voltage increase.
With reference to Fig. 5, when 3% mixed, the increase with voltage showed as successively with the glow color of the top the same device of reason: red-orange-Huang-green.
With reference to Fig. 6, when 5% mixed, because the increase of porphyrin amount, the electroluminescent spectrum of device mainly was a porphyrin.Therefore, the increase device of along with voltage mainly shows as red-orange.
With reference to Fig. 7, when 8% mixed, device showed as the luminous of porphyrin basically, only the light of rubescent look.
PEDOT: poly-(3,4-dioxy ethylene thiophene),
Molecular structural formula is:
Acquisition approach: buy from Aldrich company import reagent PEDOT/PSS mixture, trade name: poly-(3,4-dioxy ethylene thiophene)/poly-p-sulfonic acid base styrene.
PSS: poly-p-sulfonic acid base styrene,
Molecular structural formula is:
Acquisition approach: buy import reagent PEDOT/PSS mixture.
TTP: four p-methylphenyl porphyrins,
Molecular structural formula is:
Acquisition approach: buy import reagent, trade name: four p-methylphenyl porphyrins.
TPP: tetraphenylporphyrin,
Molecular structural formula is:
Acquisition approach: buy import reagent.
MEH-PPV: poly-(the 2-methoxyl group, 5-(2-ethyl-own oxygen base)-to phenylacetylene),
Molecular structural formula is:
Acquisition approach: synthetic voluntarily.
Synthetic method and route belong to the prior art category, and be specific as follows:
Concrete building-up process:
1. methoxyl group-4-(2-ethyl hexyl oxy) benzene is synthetic
The NaOH that in the 500mL flask, successively adds 20g (0.5mol), the p methoxy phenol of 40.7g (0.33mol), the tetra-n-butyl ammonium bromide of 5.0g (0.0155mol), the 150mL deionized water adds 2-ethylhexyl bromine 35g (0.184mol) at last.Refluxed 48 hours, reaction mixture is cooled to room temperature, use 100mL deionized water washing oil layer three times, oil reservoir anhydrous calcium chloride drying, solids removed by filtration, 198 ℃ of cuts are collected in decompression distillation under 0.02Mpa.
2. α, α '-two chloro-2-methoxyl group-5-(2-ethyl hexyl oxy) dimethylbenzene synthetic
In the 250ml flask, add 5g (0.021mol) product 1,3g paraformaldehyde, 10ml glacial acetic acid, 5ml concentrated hydrochloric acid in the priority.Reacted 7 hours down at 70 ℃, in course of reaction, in reactant liquor, lead to hydrogen chloride gas.After reaction finished, the reaction system cool to room temperature was poured reactant mixture in the 50ml carrene into, with the saturated sodium carbonate solution washing, became neutral up to the oil reservoir pH value; Then, oil reservoir anhydrous calcium chloride drying is filtered, and evaporates carrene, obtains required product.With product recrystallization in methyl alcohol, vacuumize.
3. poly-(2-methoxyl group, 5-(2-ethyl-own oxygen base)-to phenylacetylene) synthetic
Add 0.5g product 2 in the 100ml flask, add the 80ml oxolane, slowly add potassium tert-butoxide solution, nitrogen reacted 16 hours down, mixture was poured in the methanol solution of quick stirring, separated out orange polymer, filtered washing, vacuumize.
The preparation of devices method:
(1) doping method: the ratio of doping is the TTP that adds of the weight according to MEH-PPV or the percetage by weight of TPP, they is put into certain amount of organic solvent simultaneously be made into mixed solution.Concentration is 1～8%, is preferably 3%.
Example 1: 0.6 milligram TTP joined among 20 milligrams the MEH-PPV, they are dissolved in the chloroform of 1ml are made into mixed solution again, after filtering with 0.45 μ m filter, promptly can be used for spin coating system film.
Example 2: 0.6 milligram TPP joined among 20 milligrams the MEH-PPV, they are dissolved in the chloroform of 1ml are made into mixed solution again, after filtering with 0.45 μ m filter, promptly can be used for spin coating system film.
(2) manufacturing process of device: with reference to Fig. 2, handling on the clean ITO, adopting the method for spin-coating to coat the thick PEDOT/PSS rete of 20nm, vacuumize is to remove residual solvent; Coat the thick MEH-PPV+3%TTP luminescent layer of about 100nm with the method for spin-coating thereon again, vacuumize is to remove residual solvent; At last, use vacuum coating technology, the thick metallic cathode of 100nm on the deposition, metallic cathode specifically can be Al.The thickness of rete is luminous influential to device, too thick or too thinly all can have influence on luminously, and what have is even not luminous.
Claims (5)
1, a kind of multicolored organic LED, comprise anode, be arranged at hole injection layer on the described anode, be arranged at luminescent layer on the described hole injection layer, be arranged at the negative electrode on the described luminescent layer, it is characterized in that: the thickness of described hole injection layer rete is 10～30nm; The thickness of described luminescent layer rete is 80～120nm; The thickness of described negative electrode is 80～120nm; Described anode is a tin indium oxide; Described hole injection layer is PEDOT:PSS, and the molecular structural formula of PEDOT is:
The molecular structural formula of PSS is:
Described luminescent layer is TTP doping MEH-PPV or TPP doping MEH-PPV;
The molecular structural formula of TTP is:
The molecular structural formula of TPP is:
The molecular structural formula of MEH-PPV is:
Described negative electrode is metallic aluminium or magnesium, calcium, silver, lithium; The mass concentration of described luminescent layer TTP doping MEH-PPV or TPP doping MEH-PPV is 1～8%.
2, multicolored organic LED according to claim 1 is characterized in that: the mass concentration of described luminescent layer TTP doping MEH-PPV or TPP doping MEH-PPV is 3%.
3, multicolored organic LED according to claim 1 is characterized in that: the thickness of described hole injection layer rete is 20nm.
4, multicolored organic LED according to claim 1 is characterized in that: the thickness of described luminescent layer rete is 100nm.
5, multicolored organic LED according to claim 1 is characterized in that: the thickness of described negative electrode is 100nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100520815A CN100499201C (en) | 2006-06-22 | 2006-06-22 | Multicolored organic LED |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100520815A CN100499201C (en) | 2006-06-22 | 2006-06-22 | Multicolored organic LED |
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| CN1866571A CN1866571A (en) | 2006-11-22 |
| CN100499201C true CN100499201C (en) | 2009-06-10 |
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| CNB2006100520815A Expired - Fee Related CN100499201C (en) | 2006-06-22 | 2006-06-22 | Multicolored organic LED |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101373816B (en) * | 2008-10-21 | 2010-06-02 | 电子科技大学 | Method for preparing organic electroluminescent device |
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Non-Patent Citations (3)
| Title |
|---|
| Surfaces and interfaces in polymer-based electronics. M. Fahlman, W. R. Salaneck.Surface Science,Vol.500 No.1-3. 2002 * |
| Synthesis of Porphyrin-PPV Copolymers for Applications inLEDs. R. Iqbal.Synthetic Metals,Vol.102 No.1-3. 1999 * |
| 反向偏压下的压控颜色可调谐聚合物电致发光. 谭海曙，邹开顺.光电子·激光，第13卷第5期. 2002 * |
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