CN1970681A - Near infrared organic electroluminescent materials and devices and method for fabricating the device - Google Patents
Near infrared organic electroluminescent materials and devices and method for fabricating the device Download PDFInfo
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- CN1970681A CN1970681A CN 200610017222 CN200610017222A CN1970681A CN 1970681 A CN1970681 A CN 1970681A CN 200610017222 CN200610017222 CN 200610017222 CN 200610017222 A CN200610017222 A CN 200610017222A CN 1970681 A CN1970681 A CN 1970681A
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Abstract
The invention discloses a near-infrared organic electroluminescent material and device and making method, which is three-source copolymer of infrared fluorescent dye, II-VI semiconductor nanometer particle and conductive polymer, wherein the semiconductive nanometer particle is doped in the polymer through physical method, which is composited on the polymer through chemical method; the electroluminescent device is prepared by simple rotary-coating method; the device structure is ITO//PEDOT:PSS//polymer luminous layer// metal cathode. The invention can launch center wavelength at 890 nm, which makes maximum luminous strength at 115nw.
Description
Technical field
The present invention relates to a kind of near infrared organic electroluminescent materials and device and preparation of devices method.
Background technology
Photonics is the basis that promotes development communication technologies always, but existing technology and device can't satisfy following requirement of using in 10 years.In order to address the above problem, the requirement following ultrafast and processing of large vol information is all satisfied competitively developing new photonic material and high-performance photon device in countries in the world, consistently thinks that following optical element will have the characteristics of highly integrated and low tooling cost.The latest developments of organic materials and relevant opto-electronic device show, organic materials has low tooling cost and satisfies the polyfunctional potentiality that communications applications requires, because organic materials has simple preparation technology, has favorable compatibility, is easy to be made on silicon substrate and the flexible base, board with existing microelectronics, big area and have both characteristics such as multifunctional light, electrical characteristic, be following most important photoelectron material, in the opto-electronic device in future, playing the part of important role.
As the important opto-electronic device of a class, Organic Light Emitting Diode is owing to the successful Application in flat pannel display has obtained broad development.Along with deepening continuously of research work, people have begun organic materials is expanded near infrared, infrared light district from visible region, preparation opticfiber communication organic luminescent device.Near infrared, the infrared light luminous organic material of report mainly are some rare earth ions such as Er at present
3+, Nd
3+, Pr
3+, Yb
3+, Tm
3+Title complex, its electroluminescent is based on inorganic rare earth ionic 4f-4f transition of electron characteristic, can realize the infrared organic luminescent device that emmission spectrum is narrower like this in the 900-1600 nano-area.People's (Si Luofu etc., Applied Physics wall bulletin, 78 phases such as Luo Fu like that, 2122 pages, calendar year 2001, L.H.Slooff, A.Polman, F.Cacialli, R.H.Friend, G.A.Hebbink, F.C.J.M.van Veggel and D.H.Reinhoudt, Appl.Phys.Lett.78, pp2122 (2001)) design has synthesized Nd
3+Title complex, and with the polymer-doped 890 nm near-infrared organic luminescent devices of having prepared, external quantum efficiency is 8 * 10
-3Every ampere of international candle; In the storehouse, Ji Lien with synthetic 8-hydroxy-quinoline erbium title complex prepared emission wavelength be 1.54 microns infrared Organic Light Emitting Diode (in the storehouse, Ji Lien, the Applied Physics wall bulletin, 75 phases, 1380 pages, 1999, R.J.Curry, W.P.Gillin, Appl.Phys.Lett.75, pp1380 (1999)); Harry is gloomy to wait people's (Harry is gloomy etc., Applied Physics wall bulletin, 79 phases, 3770 pages, calendar year 2001, B.S.Harrison, et al., Appl.Phys.Lett.79, pp3770 (2001)) to prepare the ytterbium Yb of 977 nanometers and 1560 nanometers
3+With erbium Er
3+The infrared Organic Light Emitting Diode of title complex, external quantum efficiency are 0.1%; People such as Li Wenlian (Li Wenlian etc., Applied Physics wall bulletin, 84 phases, 2679 pages,, F.X.Zang, Z.R.Hong, W.L.Li, M.T.Li, and X.Y.Sun, Appl.Phys.Lett.84, pp2679 (2004) in 2004) have also synthesized Pr
3+, Tm
3+Infrared rare earth compounding, and prepare the infrared Organic Light Emitting Diode of emission wavelength in the 1400-1600 nanometer with them.Can see,,, can't satisfy the requirement of application so lower luminous quantum efficiency is all arranged usually with the infrared Organic Light Emitting Diode of rare earth compounding preparation because the 4f-4f transition is a process that part is forbidden.
In recent years, people on infrared organic dye and infrared nanoparticle and the polymer composites system, have obtained certain progress to target tightening.(Su Zhuke one for Su Zhuke one in 2000, the Applied Physics wall bulletin, 76 phases, 1543 pages, 2000, H.Suzuki, Appl.Phys.Lett.76, pp1543 (2000)) with a kind of near infrared ionic dye (LDS821) and polymkeric substance hole mobile material Polyvinyl carbazole (PVK) and organic molecule electron transport material 2-(4-xenyl)-5-(4-t-butylbenzene base)-1,3,4-oxadiazoles (PBD) blend has been prepared the near infrared Organic Light Emitting Diode as luminescent layer, and maximum external quantum efficiency has reached 1%; (Su Zhuke one for Su Zhuke one in 2002, the Applied Physics wall bulletin, 80 phases, 3256 pages, 2002, H.Suzuki et al., Appl.Phys.Lett.80, pp3256 (2002)) also prepared wavelength at the adjustable infrared Organic Light Emitting Diode of 900-1500 nanometer by adulterated method with organic ion dyestuff IR1051.Aspect nanometer/polymer composites system, people (Tai Sileer etc. such as Tai Sileer in 2002, science, 295 volumes, 1506 pages, 2002, N.Tessler et al.Science, 295, pp1506,2002) (MEH-PPV) do active layer with InAs-ZnSe core-shell structure nanometer particle doping poly-(2-methoxyl group-5-(2-ethyl-hexyloxy)-P-vinylbenzene support) and developed emission wavelength at the adjustable infrared polymer LED of 1-1.3 micron, external quantum efficiency has reached 0.5%, has shown good infrared electroluminescent properties.Sha Ergeen top grade people (Sha Ergeen top grade in 2004, the Applied Physics wall bulletin, 84 phases, 3459 pages, 2004, E.H.Sargent et al.Appl.Phys.Lett., 84, pp3459,2004) with three layers of organic luminescent device of gel PbS nanoparticle preparation, its emission wavelength is in the 1.1-1.6 micrometer range, and maximum electroluminescent internal quantum efficiency is up to 3.1%.
Yet, be far from reaching application requiring with the infrared organic light-emitting device performance of present material system preparation, press for the new infrared Organic Electroluminescent Devices Based material system of exploitation, for organic electroluminescence device provides material in the application of opticfiber communication.
Summary of the invention
One of purpose of the present invention provides a kind of near infrared organic electroluminescent materials.
Another object of the present invention provides the infrared organic luminescent device by this near infrared organic electroluminescent materials preparation.
The 3rd purpose of the present invention provides the infrared organic light-emitting device preparation method by this near infrared organic electroluminescent materials preparation.
Near infrared organic electroluminescent materials provided by the invention, by Infrared fluorescence dyestuff, II-VI family semi-conductor nano particles and semi-conducting polymer is the mixture of forming in 3: 2: 20 to 9: 1: 40 by weight, can be the mixture of forming in 1: 9 to 2: 3 by weight with the semi-conducting polymer that is compounded with nanoparticle by Infrared dyes also.
What described Infrared fluorescence dyestuff was an energy gap less than in the Infrared dyes with inner salt or outer salt structure of 1.4eV is any, preferred Infrared dyes is 2-(2-{2-chloro-3-[2-(1,1,3-trimethylammonium-2,3-dihydro-1H-benzo [e] indoles-2-subunit) ethylidene]-the 1-cyclohexenyl }-the 1-vinyl)-1,1,3-trimethylammonium-1H-benzo [e] indoles 4-methyl isophthalic acid-benzene sulfonate, be abbreviated as ADS830AT, its molecular structural formula is as follows:
Described semi-conducting polymer be main chain or side chain contain the polymkeric substance of carbazole group be compounded with the main chain of nanoparticle or polymkeric substance that side chain contains carbazole group in any, can adopt Polyvinyl carbazole PVK or be compounded with the Polyvinyl carbazole PVK of nanoparticle.
Described II-VI family semi-conductor nano particles is any in cadmium selenide (CdSe), Cadmium Sulfide (CdS), zinc selenide (ZnSe), zinc telluridse (ZnTe) or the zinc sulphide (ZnS).
Described II-VI family semi-conductor nano particles, can also be cadmium telluride (nuclear)/Cadmium Sulfide (shell) (CdTe/CdS), zinc selenide (nuclear)/Cadmium Sulfide (shell) (ZnSe/CdS), (ZnTe/CdS) any in the semi-conductor core-shell structure nanometer particle of zinc telluridse (nuclear)/Cadmium Sulfide (shell).
Shown in attached Fig. 1 and 2, the near infrared organic luminescent device of near infrared organic electroluminescent materials provided by the invention preparation, it be by: substrate 1, anode layer 2, conductive polymer coating 3, luminescent layer 4 and metallic cathode layer 5 constitute; Wherein anode layer 2 evaporations are on substrate 1, and successively by the spin coating method preparation, metallic cathode layer 5 is that evaporation is on luminescent layer 4 on anode layer 2 for conductive polymer coating 3, luminescent layer 4.
Substrate 1 is glass or polycarbonate flexible substrate;
Anode layer 2 is indium tin oxide ITO;
Conductive polymer coating 3 is mixtures (PEDOT:PSS) of poly-(3,4-vinyl dioxy thiophene) and poly-(styrene sulfonate);
Luminescent layer 4 is any of near infrared organic electroluminescent materials provided by the invention;
When applying voltage between two electrodes, this organic electroluminescence device that contains the infraluminescence layer of near infrared organic electroluminescent materials will be launched infrared light.
Infrared Organic Electroluminescent Devices Based preparation of devices method of the present invention is as follows:
Earlier the ito anode layer 2 on the ito glass substrate layer 1 is photo-etched into the electrode of fine strip shape, cleans then, nitrogen dried up, with the oxygen plasma treatment of 30 watts of energy 2 minutes; Spin coating one deck PEDOT:PSS layer 3 thereon, are placed on baking oven oven dry under 110 ℃ then and remove moisture in 30 minutes, and the thickness of PEDOT:PSS layer 3 is 50 nanometers; Spin coating one deck doped polymer infraluminescence layer 4 on PEDOT:PSS layer 3 more afterwards, wherein the strength of solution of polymkeric substance is controlled at 3mg/ml to 30mg/ml, light emitting layer thickness is the 20-200 nanometer, then it is transferred in the vacuum coating system, treats that vacuum tightness reaches 1-5 * 10
-4During handkerchief with metallic cathode Al layer 5 evaporation on luminescent layer 4, the vaporator rate of Al electrode is controlled at 0.5-5 nanometer per second; Wherein two electrodes intersect to form the luminous zone of device mutually, and the thickness of metal electrode is 200 nanometers, finally obtain the near infrared organic luminescent device of near infrared organic electroluminescent materials preparation.
Advantage of the present invention is the blend that the luminescent layer 4 of the infrared Organic Electroluminescent Devices Based device of preparation is made up of Infrared fluorescence dyestuff, II-VI family semi-conductor nano particles and conductive polymers.
Another advantage of the present invention is that the luminescent layer 4 of the infrared Organic Electroluminescent Devices Based device of preparation prepares by the solution spin coating method, and it is simple to have preparation technology, is easy to processing and large-area characteristics.
The introducing that the 3rd advantage of the present invention is II-VI family semi-conductor nano particles in the luminescent layer 4 has reduced operating voltage, has improved luminous intensity.
Description of drawings
The present invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of infrared Organic Electroluminescent Devices Based device.Among the figure, the 1st, glass or polycarbonate flexible substrate, the 2nd, anode layer ITO, the 3rd, PEDOT:PSS layer, the 4th, luminescent layer, the 5th, metallic cathode layer.Fig. 1 also is the specification digest accompanying drawing.
Fig. 2 is the diagrammatic cross-section of Fig. 1.
Fig. 3 be embodiments of the invention 1 based on mix (ADS830AT: CdSe/CdS: PVK=3: 1: 16, weight ratio) organic electroluminescence device spectrogram under different voltages behind the Infrared dyes ADS830AT doping Polyvinyl carbazole PVK again with nucleocapsid structure cadmium selenide/Cadmium Sulfide (CdSe/CdS) nanoparticle as luminescent layer.Device is all launched infrared light under different voltages, centre wavelength is 890 nanometers.
Fig. 4 be embodiments of the invention 1 based on mixing spectrogram with nucleocapsid structure cadmium selenide/Cadmium Sulfide (CdSe/CdS) nanoparticle again behind the Infrared dyes ADS830AT doping Polyvinyl carbazole PVK as organic electroluminescence device different relative contents of Infrared dyes ADS830AT (weight ratio) under 20 volts of voltages of luminescent layer with the CdSe/CdS nanoparticle.Device is all launched infrared light under different concns, centre wavelength is 890 nanometers.
Fig. 5 be embodiments of the invention 1 based on mixing (ADS830AT: CdSe/CdS: PVK=3: 1: 16 with nucleocapsid structure cadmium selenide/Cadmium Sulfide (CdSe/CdS) nanoparticle again behind the Infrared dyes ADS830AT doping Polyvinyl carbazole PVK, weight ratio) as the electric current-brightness-voltage response of the organic electroluminescence device of luminescent layer, the cut-in voltage of device is 8.8 volts (voltages when the definition luminous intensity is 1 nanowatt), and maximum emission intensity can reach 115 nanowatts.
Fig. 6 be embodiments of the invention 2 based on Infrared dyes ADS830AT doped and compounded the Polyvinyl carbazole (PVK) (ADS830AT: PVK-CdTe=1: 4, weight ratio) of cadmium telluride (CdTe) nanoparticle to be arranged be the spectrogram of organic electroluminescence device under different voltages of luminescent layer.Device is all launched infrared light under different voltages, centre wavelength is 890 nanometers.
Embodiment
Embodiment 1:
Earlier the ITO on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.The chloroformic solution of spin coating Infrared dyes ADS830AT doping Polyvinyl carbazole (PVK) and the blend of cadmium selenide/Cadmium Sulfide (CdSe/CdS) nanoparticle on PEDOT:PSS again obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-1During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, being prepared into structure is the infrared Organic Electroluminescent Devices Based device of ITO//PEDOT:PSS//ADS830AT:CdSe/CdS:PVK//Al.Wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, and the spin coating speed of PEDOT:PSS is 3000 rpms, and the spin coating speed of luminescent layer is 2500 rpms, and two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.It is 3: 1: 16 the spectrogram of infrared Organic Electroluminescent Devices Based device under different voltages that Fig. 3 has provided Infrared dyes ADS830AT, core-shell nano CdSe/CdS and Polyvinyl carbazole PVK doping part by weight, this device is all launched infrared light under different voltages, and centre wavelength is 890 nanometers.It is the spectrogram of organic electroluminescence device different relative weight content with CdSe/CdS of ADS830AT under 20 volts of voltages of luminescent layer with core-shell nano CdSe/CdS doping Polyvinyl carbazole PVK that Fig. 4 has provided Infrared dyes ADS830AT, this device is all launched infrared light under different relative concentrations, and centre wavelength is 890 nanometers.Fig. 5 has provided Infrared dyes ADS830AT, core-shell nano CdSe/CdS and Polyvinyl carbazole PVK doping part by weight is the electric current-brightness-voltage response of 3: 1: 16 infrared Organic Electroluminescent Devices Based device, the cut-in voltage of device is 8.8 volts (voltages when the definition luminous intensity is 1 nanowatt), and maximum emission intensity can reach 115 nanowatts.
Embodiment 2:
Earlier the ITO on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.Spin coating Infrared dyes ADS830AT doped and compounded has the chloroformic solution of Polyvinyl carbazole (PVK) blend of cadmium telluride (CdTe) nanoparticle on PEDOT:PSS again, obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-4During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, being prepared into structure is the infrared Organic Electroluminescent Devices Based device of ITO//PEDOT:PSS//ADS830AT:PVK-CdTe//Al, wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, the spin coating speed of PEDOT:PSS is 3000 rpms, the spin coating speed of luminescent layer is 2500 rpms, two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.It is 1: 4 the spectrogram of infrared Organic Electroluminescent Devices Based device under different voltages that Fig. 6 has provided Infrared dyes ADS830AT and the Polyvinyl carbazole PVK-CdTe doping part by weight that is compounded with the CdTe nanoparticle, this device is all launched infrared light under different voltages, and centre wavelength is 890 nanometers.Equally outside Different Red under the dye adulterated ratio this device still can launch infrared light, centre wavelength is 890 nanometers, the cut-in voltage of this device is 15 volts (definition luminous intensity voltages when being 1 nanowatt), maximum emission intensity can reach 24 nanowatts.
Embodiment 3:
Earlier the ITO on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.The chloroformic solution of spin coating Infrared dyes ADS830AT doping Polyvinyl carbazole (PVK) and the blend of cadmium selenide/Cadmium Sulfide (CdSe/CdS) nanoparticle on PEDOT:PSS again obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-4During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, be prepared into structure and be ITO//PEDOT:PSS//ADS830AT: CdSe/CdS: PVK (1: 9: 40, weight ratio) //the infrared Organic Electroluminescent Devices Based device of Al.Wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, and the spin coating speed of PEDOT:PSS is 3000 rpms, and the spin coating speed of luminescent layer is 2000 rpms, and two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.This device is all launched infrared light under different voltages, centre wavelength is 890 nanometers, and the cut-in voltage of device is 9 volts (voltages when the definition luminous intensity is 1 nanowatt), and maximum emission intensity can reach 80 nanowatts.
Embodiment 4:
Earlier the ITO on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.The chloroformic solution of spin coating Infrared dyes ADS830AT doping Polyvinyl carbazole (PVK) and the blend of cadmium selenide/Cadmium Sulfide (CdSe/CdS) nanoparticle on PEDOT:PSS again obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-4During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, be prepared into structure and be ITO//PEDOT:PSS//ADS830AT: CdSe/CdS: PVK (2: 3: 20, weight ratio) //the infrared Organic Electroluminescent Devices Based device of Al.Wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, and the spin coating speed of PEDOT:PSS is 3000 rpms, and the spin coating speed of luminescent layer is 2000 rpms, and two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.This device is all launched infrared light under different voltages, centre wavelength is 890 nanometers, and the cut-in voltage of device is 8 volts (voltages when the definition luminous intensity is 1 nanowatt), and maximum emission intensity can reach 98 nanowatts.
Embodiment 5:
Earlier the ITO on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.The chloroformic solution of spin coating Infrared dyes ADS830AT doping Polyvinyl carbazole (PVK) and the blend of cadmium selenide/Cadmium Sulfide (CdSe/CdS) nanoparticle on PEDOT:PSS again obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-4During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, be prepared into structure and be ITO//PEDOT:PSS//ADS830AT: CdSe/CdS: PVK (3: 7: 40, weight ratio) //the infrared Organic Electroluminescent Devices Based device of Al.Wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, and the spin coating speed of PEDOT: PSS is 3000 rpms, and the spin coating speed of luminescent layer is 2000 rpms, and two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.This device is all launched infrared light under different voltages, centre wavelength is 890 nanometers, and the cut-in voltage of device is 8.5 volts (voltages when the definition luminous intensity is 1 nanowatt), and maximum emission intensity can reach 103 nanowatts.
Embodiment 6:
Earlier the ITO on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.Spin coating Infrared dyes ADS830AT doped and compounded has the chloroformic solution of Polyvinyl carbazole (PVK) blend of cadmium telluride (CdTe) nanoparticle on PEDOT:PSS again, obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-4During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, be prepared into structure and be ITO//PEDOT:PSS//ADS830AT: PVK-CdTe (1: 9, weight ratio) //the infrared Organic Electroluminescent Devices Based device of Al.Wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, and the spin coating speed of PEDOT:PSS is 3000 rpms, and the spin coating speed of luminescent layer is 2500 rpms, and two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.This device is all launched infrared light under different voltages, centre wavelength is 890 nanometers, and the cut-in voltage of device is 18 volts (voltages when the definition luminous intensity is 1 nanowatt), and maximum emission intensity can reach 20 nanowatts.
Embodiment 7:
Earlier the ITO on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.Spin coating Infrared dyes ADS830AT doped and compounded has the chloroformic solution of Polyvinyl carbazole (PVK) blend of cadmium telluride (CdTe) nanoparticle on PEDOT:PSS again, obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-4During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, be prepared into structure and be ITO//PEDOT:PSS//ADS830AT: PVK-CdTe (2: 3, weight ratio) //the infrared Organic Electroluminescent Devices Based device of Al.Wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, and the spin coating speed of PEDOT:PSS is 3000 rpms, and the spin coating speed of luminescent layer is 2500 rpms, and two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.This device is all launched infrared light under different voltages, centre wavelength is 890 nanometers, and the cut-in voltage of device is 14 volts (voltages when the definition luminous intensity is 1 nanowatt), and maximum emission intensity can reach 34 nanowatts.
Embodiment 8:
Earlier the ITO on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.The chloroformic solution of spin coating Infrared dyes ADS830AT doping Polyvinyl carbazole (PVK) and the blend of cadmium telluride/Cadmium Sulfide (CdTe/CdS) nanoparticle on PEDOT:PSS again obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-4During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, be prepared into structure and be ITO//PEDOT:PSS//ADS830AT: CdTe/CdS: PVK (2: 3: 20, weight ratio) //the infrared Organic Electroluminescent Devices Based device of Al.Wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, and the spin coating speed of PEDOT:PSS is 3000 rpms, and the spin coating speed of luminescent layer is 2000 rpms, and two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.This device is all launched infrared light under different voltages, centre wavelength is 890 nanometers, and the cut-in voltage of device is 8.5 volts (voltages when the definition luminous intensity is 0.1 microwatt), and maximum emission intensity can reach 90 microwatts.
Embodiment 9:
Earlier the ITO on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.The chloroformic solution of spin coating Infrared dyes ADS830AT doping Polyvinyl carbazole (PVK) and the blend of zinc selenide/Cadmium Sulfide (ZnSe/CdS) nanoparticle on PEDOT:PSS again obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-4During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, be prepared into structure and be ITO//PEDOT:PSS//ADS830AT: ZnSe/CdS: PVK (3: 7: 40, weight ratio) //the infrared Organic Electroluminescent Devices Based device of Al.Wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, and the spin coating speed of PEDOT:PSS is 3000 rpms, and the spin coating speed of luminescent layer is 2000 rpms, and two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.This device is all launched infrared light under different voltages, centre wavelength is 890 nanometers, and the cut-in voltage of device is 8.5 volts (voltages when the definition luminous intensity is 0.1 microwatt), and maximum emission intensity can reach 90 microwatts.
Embodiment 10:
Earlier the ITO on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.The chloroformic solution of spin coating Infrared dyes ADS830AT doping Polyvinyl carbazole (PVK) and the blend of zinc telluridse/Cadmium Sulfide (ZnTe/CdS) nanoparticle on PEDOT:PSS again obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-4During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, be prepared into structure and be ITO//PEDOT:PSS//ADS830AT: ZnTe/CdS: PVK (3: 7: 40, weight ratio) //the infrared Organic Electroluminescent Devices Based device of Al.Wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, and the spin coating speed of PEDOT:PSS is 3000 rpms, and the spin coating speed of luminescent layer is 2000 rpms, and two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.This device is all launched infrared light under different voltages, centre wavelength is 890 nanometers, and the cut-in voltage of device is 8.5 volts (voltages when the definition luminous intensity is 0.1 microwatt), and maximum emission intensity can reach 90 microwatts.
Embodiment 11:
Earlier the IT0 on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.Spin coating Infrared dyes ADS830AT doped and compounded has the chloroformic solution of Polyvinyl carbazole (PVK) blend of Cadmium Sulfide (CdS) nanoparticle on PEDOT:PSS again, obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-4During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, be prepared into structure and be ITO//PEDOT:PSS//ADS830AT: PVK-CdS (2: 3, weight ratio) //the infrared Organic Electroluminescent Devices Based device of Al.Wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, and the spin coating speed of PEDOT:PSS is 3000 rpms, and the spin coating speed of luminescent layer is 2500 rpms, and two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.This device is all launched infrared light under different voltages, centre wavelength is 890 nanometers, and the cut-in voltage of device is 14.5 volts (voltages when the definition luminous intensity is 0.1 microwatt), and maximum emission intensity can reach 70 microwatts.
Embodiment 12:
Earlier the ITO on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.Spin coating Infrared dyes ADS830AT doped and compounded has the chloroformic solution of Polyvinyl carbazole (PVK) blend of zinc selenide (ZnSe) nanoparticle on PEDOT:PSS again, obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-4During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, be prepared into structure and be ITO//PEDOT:PSS//ADS830AT: PVK-ZnSe (1: 9, weight ratio) //the infrared Organic Electroluminescent Devices Based device of Al.Wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, and the spin coating speed of PEDOT:PSS is 3000 rpms, and the spin coating speed of luminescent layer is 2500 rpms, and two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.This device is all launched infrared light under different voltages, centre wavelength is 890 nanometers, and the cut-in voltage of device is 14.5 volts (voltages when the definition luminous intensity is 0.1 microwatt), and maximum emission intensity can reach 40 microwatts.
Embodiment 13:
Earlier the ITO on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.Spin coating Infrared dyes ADS830AT doped and compounded has the chloroformic solution of Polyvinyl carbazole (PVK) blend of zinc telluridse (ZnTe) nanoparticle on PEDOT:PSS again, obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-4During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, be prepared into structure and be ITO//PEDOT:PSS//ADS830AT: PVK-ZnTe (1: 4, weight ratio) //the infrared Organic Electroluminescent Devices Based device of Al.Wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, and the spin coating speed of PEDOT:PSS is 3000 rpms, and the spin coating speed of luminescent layer is 2500 rpms, and two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.This device is all launched infrared light under different voltages, centre wavelength is 890 nanometers, and the cut-in voltage of device is 14.5 volts (voltages when the definition luminous intensity is 0.1 microwatt), and maximum emission intensity can reach 30 microwatts.
Embodiment 14:
Earlier the ITO on the ito glass is photo-etched into the electrode of 5 mm wides, 30 millimeters long, clean then, nitrogen dries up, with oxygen plasma treatment 2 minutes, after spin coating one deck PEDOT:PSS conductive polymers thereon immediately, be put into baking oven oven dry under 110 ℃ and removed moisture in 30 minutes, the thickness of PEDOT:PSS film is about 50 nanometers.Spin coating Infrared dyes ADS830AT doped and compounded has the chloroformic solution of Polyvinyl carbazole (PVK) blend of zinc sulphide (ZnS) nanoparticle on PEDOT:PSS again, obtains the luminescent layer of 100 nanometer thickness.Then it is transferred in the vacuum coating system, treat that vacuum tightness reaches 1-5 * 10
-4During handkerchief with the metal A l evaporation of 200 nanometer thickness on luminescent layer, be prepared into structure and be ITO//PEDOT:PSS//ADS830AT: PVK-ZnS (2: 3, weight ratio) //the infrared Organic Electroluminescent Devices Based device of Al.Wherein the vaporator rate of Al electrode is controlled at 5 nanometer per seconds, and the spin coating speed of PEDOT:PSS is 3000 rpms, and the spin coating speed of luminescent layer is 2500 rpms, and two electrodes intersect to form the luminous zone of device mutually, and area is 25 square millimeters.This device is all launched infrared light under different voltages, centre wavelength is 890 nanometers, and the cut-in voltage of device is 14.5 volts (voltages when the definition luminous intensity is 0.1 microwatt), and maximum emission intensity can reach 60 microwatts.
Claims (4)
1. infrared Organic Electroluminescent Devices Based material, it is characterized in that, it is the mixture of forming in 3: 2: 20 to 9: 1: 40 by Infrared fluorescence dyestuff, II-VI family semi-conductor nano particles and semi-conducting polymer by weight, or is the mixture of forming in 1: 9 to 2: 3 by weight by Infrared fluorescence dyestuff and the semi-conducting polymer that is compounded with nanoparticle;
Described Infrared fluorescence dyestuff is an energy gap less than the Infrared fluorescence dyestuff with inner salt or outer salt structure of 1.4eV is 2-(2-{2-chloro-3-[2-(1,1,3-trimethylammonium-2,3-dihydro-1H-benzo [e] indoles-2-subunit) ethylidene]-the 1-cyclohexenyl }-the 1-vinyl)-1,1,3-trimethylammonium-1H-benzo [e] indoles 4-methyl isophthalic acid-benzene sulfonate, its molecular structural formula is as follows:
Described semi-conducting polymer adopts Polyvinyl carbazole PVK or is compounded with the Polyvinyl carbazole PVK of nanoparticle;
Described II-VI family semi-conductor nano particles is any in cadmium selenide, Cadmium Sulfide, zinc selenide, zinc telluridse or the zinc sulphide.
2, a kind of infrared Organic Electroluminescent Devices Based material as claimed in claim 1, it is characterized in that, described II-VI family semi-conductor nano particles is any in cadmium telluride (nuclear)/Cadmium Sulfide (shell), zinc selenide (nuclear)/Cadmium Sulfide (shell), zinc telluridse (nuclear)/Cadmium Sulfide (shell) the semi-conductor core-shell structure nanometer particle.
3, a kind of near infrared organic electroluminescent device by claim 1 or 2 described infrared Organic Electroluminescent Devices Based material preparations, it is characterized in that it is to be made of: substrate (1), anode layer (2), conductive polymer coating (3), luminescent layer (4) and metallic cathode layer (5); Wherein anode layer (2) evaporation is on substrate (1), and successively by the spin coating method preparation, metallic cathode layer (5) is that evaporation is on luminescent layer (4) on anode layer (2) for conductive polymer coating (3), luminescent layer (4);
Substrate (1) is glass or polycarbonate flexible substrate;
Anode layer (2) is indium tin oxide ITO;
Conductive polymer coating (3) is the mixture of poly-(3,4-vinyl dioxy thiophene) and poly-(styrene sulfonate);
Luminescent layer (4) is any of near infrared organic electroluminescent materials provided by the invention;
Metallic cathode layer (5) is aluminium (A1).
4, a kind of method for preparing the described infrared Organic Electroluminescent Devices Based device of claim 3 is characterized in that, its step and condition are as follows:
Earlier the ito anode layer (2) on the ito glass substrate layer (1) is photo-etched into the electrode of fine strip shape, cleans then, nitrogen dried up, with the oxygen plasma treatment of 30 watts of energy 2 minutes; Spin coating one deck PEDOT:PSS layer (3) is placed on baking oven oven dry under 110 ℃ then and removed moisture in 30 minutes thereon, and the thickness of PEDOT:PSS layer (3) is 50 nanometers; Go up spin coating one deck doped polymer infraluminescence layer (4) at PEDOT:PSS layer (3) more afterwards, wherein the strength of solution of polymkeric substance is controlled at 3mg/ml to 30mg/ml, light emitting layer thickness is a rice in the 20-200, then it is transferred in the vacuum coating system, treats that vacuum tightness reaches 1-5 * 10
-4During handkerchief with metallic cathode Al layer (5) evaporation on luminescent layer (4), the vaporator rate of Al electrode is controlled at metre per second (m/s) in the 0.5-5; Wherein two electrodes intersect to form the luminous zone of device mutually, and the thickness of metal electrode is rice in 200, finally obtain the near infrared organic luminescent device of near infrared organic electroluminescent materials preparation.
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| CN101593814B (en) * | 2009-06-29 | 2011-04-13 | 彩虹集团公司 | Organic elctroluminescent device and preparation method thereof |
| CN102832351A (en) * | 2012-09-11 | 2012-12-19 | 深圳市华星光电技术有限公司 | Infrared organic electroluminescent light emitting diode |
| CN104046351A (en) * | 2014-04-29 | 2014-09-17 | 中山大学 | Novel organic luminescent material with afterglow luminescence property and synthetic method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6605823B1 (en) * | 1996-07-29 | 2003-08-12 | Cambridge Display Technology Ltd. | Electroluminescent devices with electrode protection |
| EP1231251A1 (en) * | 2001-02-07 | 2002-08-14 | Agfa-Gevaert | Thin film inorganic light emitting diode |
| DE102004003143A1 (en) * | 2004-01-21 | 2005-08-18 | Kodak Polychrome Graphics Gmbh | Radiation-sensitive compositions with mercapto-functionalized, radically polymerizable monomers |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101593814B (en) * | 2009-06-29 | 2011-04-13 | 彩虹集团公司 | Organic elctroluminescent device and preparation method thereof |
| CN102832351A (en) * | 2012-09-11 | 2012-12-19 | 深圳市华星光电技术有限公司 | Infrared organic electroluminescent light emitting diode |
| WO2014040317A1 (en) * | 2012-09-11 | 2014-03-20 | 深圳市华星光电技术有限公司 | Infrared organic electroluminescent diode |
| CN104046351A (en) * | 2014-04-29 | 2014-09-17 | 中山大学 | Novel organic luminescent material with afterglow luminescence property and synthetic method and application thereof |
| CN104046351B (en) * | 2014-04-29 | 2016-11-16 | 中山大学 | There is the luminous organic material of afterglow performance and synthetic method thereof and application |
| CN113113834A (en) * | 2021-03-10 | 2021-07-13 | 华东师范大学 | Mid-infrared hollow optical fiber integrated with electroluminescent structure and preparation method thereof |
| CN116709798A (en) * | 2023-06-17 | 2023-09-05 | 陕西科技大学 | Near infrared light emitting diode and preparation method thereof |
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