CN103219401A - Method of improving current density and cell efficiency of solar cell and cell structure - Google Patents
Method of improving current density and cell efficiency of solar cell and cell structure Download PDFInfo
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- CN103219401A CN103219401A CN2013101279830A CN201310127983A CN103219401A CN 103219401 A CN103219401 A CN 103219401A CN 2013101279830 A CN2013101279830 A CN 2013101279830A CN 201310127983 A CN201310127983 A CN 201310127983A CN 103219401 A CN103219401 A CN 103219401A
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Abstract
The invention provides a method of improving the current density and the cell efficiency of a solar cell and a cell structure. The method comprises the step that a layer of combined structure formed by one or more of a micro carbon nanostructure or metal micro nano-particles or a transparent conducting thin film is arranged on the surface of a cell to enhance the light utilization efficiency of the cell. The combined structure is directly manufactured on the upper surface of the cell, or is manufactured on an independent structure, and then the combined structure is placed on the cell. The manufactured transparent conducting thin film improves the utilization rate of sunlight, and enhances the current density and the cell efficiency of the solar cell by about 2%. Meanwhile, the method is simple in process, convenient to operate, low in cost, and obvious in effect. The thin film of the combined structure manufactured by the micro carbon nanostructure, the metal nano-particles and the transparent conducting thin film is good in light transmittance, and has a good application prospect in the aspect of replacing traditional conducting glass.
Description
Technical field
The invention belongs to technical field of solar batteries, the preparation method and the battery structure that relate to the little carbon structure of a kind of nanometer, metal nanoparticle and transparent conductive film combining structure, specifically, relate to current density and the battery efficiency that a kind of method with chemical modification strengthens the transparent conductive film photoelectric conversion efficiency to improve solar cell.
Background technology
Electro-conductive glass such as ITO, FTO are widely used in various fields, such as aspects such as demonstration, communication, medical treatment, aerospace, military affairs and solar cells.But also there are problems in ITO and FTO: the reserves of operational indium metal have only 20,000 tons on (1) earth, than rare earth (reserves are 2.4 ten thousand tons) still less, cause the manufacturing cost of solar cell more and more higher; (2) ITO and FTO are stable inadequately under the condition of acid or alkali, cause its spendable being limited in scope; (3) ion is easy to be diffused into polymeric layer; (4) more limited in the light transmission of near infrared region, cause sunlight not make full use of; (5) because the structural defective of FTO causes the electric current leakage easily.Based on above reason, FTO does substrate and in use all can cause current density and battery efficiency to reduce, and finally makes the efficient of solar cell reduce.For this reason, people need seek a kind of novel thin-film material, can be used for improving the transmissivity of sunlight, and will possess advantages of higher stability, high transmission rate and good electrical conductivity.
Single-walled nanotube, double-walled nanotubes, many walls nanotube, C
60, C
70, C
84C
240, C
540Deng the general designation fullerene, be the general name of ball-type, spheroid shape, column type or the tracheary element of the hollow formed by carbon fully.Tubulose be called carbon nano-tube or Baji-tube.Fullerene is structurally very similar to graphite, and the graphene layer that graphite is made up of hexatomic ring is piled up and formed, and fullerene not only contains hexatomic ring and also has five-membered ring, also has heptatomic ring once in a while.Can produce C in a large number
60Its a lot of character of back are found, and very people such as fast Haddon finds the C of alkali-metal-doped
60The metal behavior is arranged, the C of discovery potassium in 1991 doping
60The superconduction behavior is arranged when 18K, and this is so far the highest molecule superconducting temperature, and the superconducting property of a large amount of afterwards metal-doped fullerenes is found.
Graphene is found by the Britain scientist that in 2004 its basic structural unit is benzene six ring structures the most stable in the organic material, is present optimal two-dimensional nano material.Grapheme material has the characteristic of many excellences, such as its theoretical specific area up to 2600m
2/ g has outstanding heat conductivility (3000W/ (mK)) and mechanical property (1060GPa), and at a high speed electron mobility (15000cm/ (Vs)) under the room temperature.The structure that Graphene is special makes its a series of character such as conductivity that have perfect quantum tunneling effect, half integral quantum hall effect, never disappear, thereby has caused the huge interest of scientific circles.The comparatively significantly characteristic electron that it shows can be applied in following optoelectronic device it.
In the prior art, the solar photovoltaic conversion in solar module generally all is to realize by the absorption to solar spectral of semi-conducting material such as silicon.The efficiency of solar cell theoretical upper limit of silicon materials preparation is about 30%, and the efficiency of solar cell and the theoretical limit of existing technological level preparation are approaching, have been difficult to further raising.If but can improve the light utilization efficiency of solar cell and assembly, then can under low cost, improve the energy output of solar module.An important component part in most of solar module is the solar energy glass cover plate.Its light transmittance to sunlight is high more, and is favourable more to the conversion efficiency of solar cell.So how to improve the sunken luminous energy power of glass and assembly, make more sunlight see through glass, be absorbed thereby can make more sunlight arrive light-absorption layer, improve photoelectric conversion efficiency, become the emphasis problem that research improves efficiency of solar cell.
Therefore, need provide a kind of photoelectric material that can improve solar cell, thereby can improve the transformation efficiency of solar cell, reduce cost the utilance of light.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art; a kind of method and battery structure that improves solar cell current density and battery efficiency is provided; it strengthens the light utilization ratio of battery by at least a or multiple combining structure of forming of one deck by the little carbon structure of nanometer, metal micro-nano particle or transparent conductive film is set on battery surface.
The objective of the invention is to solve by the following technical programs:
This kind of the present invention improves the method for solar cell current density and battery efficiency, it is characterized in that, by on battery surface, being provided with at least a or multiple combining structure formed of one deck, strengthen the light utilization ratio of battery by the little carbon structure of nanometer, metal micro-nano particle or transparent conductive film; Described combining structure directly prepares at the battery upper surface, perhaps it is prepared on the independent structures, then this structure is placed on the battery top.
The little carbon structure of above-mentioned nanometer is meant: size between 1nm~100nm, the sphere that the carbon structure of the sheet of single or multiple lift or stratiform carbon structure, single wall or many walls, the carbon atom that is not waited by quantity are formed, tubulose, bar-shaped, wire, strip, flower-shaped, sheet, stratiform, dentation or carbon structure that must shape.
Above-mentioned metal micro-nano particle is meant: size between 10nm~500nm, the combination of one or more of the major element in the periodic table of elements: IA, IIA, IIIA, IVA, subgroup and group of the lanthanides and actinide metals element.
Above-mentioned transparent conductive film is meant: light transmittance is greater than 70%, and resistivity is 10
-5The film of the Ω cm order of magnitude.
The preparation of the combining structure of the little carbon structure of above-mentioned nanometer, metal micro-nano particle and transparent conductive film is specially: add a certain amount of " suspension-turbid liquid " that contains little carbon structure of nanometer and metal micro-nano particle in slaine and/or enveloping agent solution, obtain thin film after the drying at room temperature on substrate;
Described slaine is one or more mixtures in inorganic salts or the organic salt; Described slaine material solution is the aqueous solution, and concentration is 0.00001~10M;
Described enveloping agent solution is the aqueous solution, and concentration is 0.00001~10M;
Described " suspension-turbid liquid " that contains the little carbon structure of nanometer is the aqueous solution, and concentration is 0.001~10mg/mL;
Described " suspension-turbid liquid " that contains the metal micro-nano particle is the aqueous solution, and concentration is 0.00001~10mg/mL;
Described reaction temperature is 10~250 ℃, is warming up to 250 ℃ by 10 ℃ of speed with 0.01~50 ℃/min, and the reaction time is: 30min~120hrs; The pH value of described solution is 4.5~8.5; Described substrate be selected from float glass, surface-treated float glass,, a kind of in ITO, FTO, the battery.
Further, above-mentioned slaine is following any one or a few combination:
Nitrate, nitrite, sulfate, sulphite, thiosulfate, carbonate, bicarbonate, acid salt, basic salt, phosphate, phosphite, dibasic alkaliine, dihydric phosphate, phosphoric acid hydrogen disalt, sulfide, chloride, bromide, fluoride, iodide, formates, acetate, citrate, salicylate, sulfonate.
Further, the above-mentioned little carbon structure of nanometer can be following any one or a few combination:
Graphite, intumescent graphite, Palta type graphite, Graphene, graphene oxide, the Graphene of partial oxidation, reduction Graphene, the Graphene of partial reduction, the Graphene that has functional group, surface have the Graphene of negative electrical charge, and the surface has the Graphene of positive charge, single wall, double-walled, multi-walled carbon nano-tubes, C
60, C
70, C
84C
240, C
540Fullerene.
Further, above-mentioned metal micro-nano particle is any or multiple combination in IA, IIA, IIIA, IVA, subgroup and the lanthanide element.
Above-mentioned enveloping agent solution is the aqueous solution, replaces this complexing agent with a kind of of methenamine, sucrose, lactose, glucose, EDTA, DMF, ethylene glycol, PVP, polyethylene glycol, lauryl sodium sulfate, softex kw, urea etc. or two kinds or several combinations.
The present invention also proposes a kind of solar battery structure, comprises the solar cell main body, and the transparent conductive film of solar cell main body is provided with the combining structure of the little carbon structure of one deck nanometer, metal micro-nano particle and transparent conductive film.
The present invention has following beneficial effect:
The transparent conductive film of the inventive method preparation has improved the utilance of sunlight, and the current density and the battery efficiency that have strengthened solar cell are about 2%.This inventive method technology is simple simultaneously, is convenient to operation, and with low cost, effect is remarkable.The light transmittance of the film of the little carbon structure of nanometer, metal nanoparticle and the transparent conductive film combining structure of the inventive method preparation is good, is possessing application promise in clinical practice aspect the alternative conventional conductive glass.
Description of drawings
Fig. 1 is the electron scanning micrograph of prepared this combining structure film;
Fig. 2 records standard cell I-V line for the solar simulator of this prepared combining structure film.
Fig. 3 is the solar cell panel structure schematic diagram that has this combining structure.
Embodiment
The method that the present invention improves solar cell current density and battery efficiency is by being provided with at least a or multiple combining structure formed of one deck by the little carbon structure of nanometer, metal micro-nano particle or transparent conductive film on battery surface, strengthening the light utilization ratio of battery; Described combining structure directly prepares at the battery upper surface, perhaps it is prepared on the independent structures, then this structure is placed on the battery top.Wherein the little carbon structure of nanometer is meant: size between 1nm~100nm, the sphere that the carbon structure of the sheet of single or multiple lift or stratiform carbon structure, single wall or many walls, the carbon atom that is not waited by quantity are formed, tubulose, bar-shaped, wire, strip, flower-shaped, sheet, stratiform, dentation or carbon structure that must shape.The metal micro-nano particle is meant: size between 10nm~500nm, the combination of one or more of the major element in the periodic table of elements: IA, IIA, IIIA, IVA, subgroup and group of the lanthanides and actinide metals element.Described transparent conductive film is meant: light transmittance is greater than 70%, and resistivity is 10
-5The film of the Ω cm order of magnitude.The preparation of the combining structure of the little carbon structure of described nanometer, metal micro-nano particle and transparent conductive film is specially: add a certain amount of " suspension-turbid liquid " that contains little carbon structure of nanometer and metal micro-nano particle in slaine and/or enveloping agent solution, obtain thin film after the drying at room temperature on substrate; Described slaine is one or more mixtures in inorganic salts or the organic salt; Described slaine material solution is the aqueous solution, and concentration is 0.00001~10M; Described enveloping agent solution is the aqueous solution, and concentration is 0.00001~10M; Described " suspension-turbid liquid " that contains the little carbon structure of nanometer is the aqueous solution, and concentration is 0.001~10mg/mL; Described " suspension-turbid liquid " that contains the metal micro-nano particle is the aqueous solution, and concentration is 0.00001~10mg/mL; Described reaction temperature is 10~250 ℃, is warming up to 250 ℃ by 10 ℃ of speed with 0.01~50 ℃/min, and the reaction time is: 30min~120hrs; The pH value of described solution is 4.5~8.5; Described substrate be selected from float glass, surface-treated float glass,, a kind of in ITO, FTO, the battery.
In preferred embodiment of the present invention, slaine is following any one or a few combination:
Nitrate, nitrite, sulfate, sulphite, thiosulfate, carbonate, bicarbonate, acid salt, basic salt, phosphate, phosphite, dibasic alkaliine, dihydric phosphate, phosphoric acid hydrogen disalt, sulfide, chloride, bromide, fluoride, iodide, formates, acetate, citrate, salicylate, sulfonate.
In preferred embodiment of the present invention, the little carbon structure of nanometer can be following any one or a few combination:
Graphite, intumescent graphite, Palta type graphite, Graphene, graphene oxide, the Graphene of partial oxidation, reduction Graphene, the Graphene of partial reduction, the Graphene that has functional group, surface have the Graphene of negative electrical charge, and the surface has the Graphene of positive charge, single wall, double-walled, multi-walled carbon nano-tubes, C
60, C
70, C
84C
240, C
540Fullerene.
Metal micro-nano particle of the present invention is any or multiple combination in IA, IIA, IIIA, IVA, subgroup and the lanthanide element.
Enveloping agent solution of the present invention is the aqueous solution, replaces this complexing agent with a kind of of methenamine, sucrose, lactose, glucose, EDTA, DMF, ethylene glycol, PVP, polyethylene glycol, lauryl sodium sulfate, softex kw, urea etc. or two kinds or several combinations.
Below in conjunction with embodiment and accompanying drawing the present invention is done and to describe in further detail:
Embodiment 1
Preparation process is as follows:
The preparation of metal nanoparticle suspension: the deionized water of measuring 200mL boils, takes by weighing according to the natrium citricum of 10mM concentration then to be added in the deionized water that boils, and with NaOH and HNO
3The pH value to 8 of regulator solution adds the metal nitrate of 5.0mL0.5M then, the pH value to 6 of regulator solution, and at this moment, solution colour becomes muddy by glassy yellow.
The little carbon structure of nanometer, the preparation of metal nanoparticle and transparent conductive film combining structure: add the solution that contains the little carbon structure of nanometer that 30mL has prepared in the 100mL beaker, solution that contains metal nanoparticle that 10mL has prepared and 10mL deionized water, taking by weighing the material solution of this transparent conductive film of preparation of 20mM and the complexing agent of 20mM is added in the above-mentioned solution that has configured, substrate with a 2 * 5cm places the above-mentioned solution that configures again, 50 ℃ of oil bath heating were left standstill to room temperature after 8 hours, take out this substrate, water is rinsed well, with this substrate drying, to be measured.
After testing, the combining structure of the little carbon structure of this nanometer, metal nanoparticle and transparent conductive film can effectively improve the transmitance of this substrate; This substrate is placed its I-V curve of test on the standard cell of solar cell simulator, find that its current density and battery efficiency have improved about 2%.
Fig. 2 records standard cell I-V curve for the solar simulator of this electrically conducting transparent builtup film.As can be seen from the figure the transparent conductive film combining structure with little carbon structure of nanometer and metal nanoparticle makes its current density and battery efficiency improve about 2%.
Implementation column 2
The preparation process of this implementation column is identical with implementation column 1, and difference is that the concentration at the material solution of used this transparent conductive film of preparation of step 3 is 0.00001M, i.e. 0.00015g, and other steps are identical with embodiment 1, prepare this electrically conducting transparent builtup film.
Implementation column 3
The preparation process of this implementation column is identical with implementation column 1, and difference is that the concentration at the material solution of used this transparent conductive film of preparation of step 3 is 10M, i.e. 148.75g, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 4
The preparation process of this implementation column is identical with implementation column 1, and difference is that the concentration at the used enveloping agent solution of step 3 is 0.00001M, i.e. 0.00007g, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 5
The preparation process of this implementation column is identical with implementation column 1, and difference is that the concentration at the used enveloping agent solution of step 3 is 10M, i.e. 70.1g, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 6
The preparation process of this implementation column is identical with implementation column 1, and difference is that in the used concentration that contains the little carbon structure solution of nanometer of step 3 be 0.001mg/mL, i.e. 0.00005g, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 7
The preparation process of this implementation column is identical with implementation column 1, and difference is that in the used concentration that contains the little carbon structure solution of nanometer of step 3 be 10mg/mL, i.e. 0.5g, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 8
The preparation process of this implementation column is identical with implementation column 1, difference is that in the used concentration that contains metal nanoparticle solution of step 3 be 0.00001M, promptly take by weighing this metal nitrate 0.00008g, other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 9
The preparation process of this implementation column is identical with implementation column 1, and difference is that in the used concentration that contains metal nanoparticle solution of step 3 be 10M, promptly takes by weighing this metal nitrate 84.9g, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
The preparation process of this implementation column is identical with implementation column 1, and difference is that the reaction temperature in step 3 is 10 ℃, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 11
The preparation process of this implementation column is identical with implementation column 1, and difference is that the reaction temperature in step 3 is 250 ℃, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 12
The preparation process of this implementation column is identical with implementation column 1, and difference is that the reaction programming rate in step 3 is 0.01 ℃/min, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 13
The preparation process of this implementation column is identical with implementation column 1, and difference is that the reaction programming rate in step 3 is 50 ℃/min, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 14
The preparation process of this implementation column is identical with implementation column 1, and difference is that in the reaction time of step 3 be 30min, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 15
The preparation process of this implementation column is identical with implementation column 1, and difference is that in the reaction time of step 3 be 120hrs, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 16
The preparation process of this implementation column is identical with implementation column 1, and difference is that the pH value when the reaction of step 3 is 4.5, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 17
The preparation process of this implementation column is identical with implementation column 1, and difference is that the pH value when the reaction of step 3 is 8.5, and other steps are identical with embodiment 1, preparation electrically conducting transparent builtup film.
Implementation column 18
1. substrate is anticipated, and processing method is: this transparent conductive film metal acetate solution of spraying one deck on substrate, behind 150 ℃ of 5hrs that anneal down, treat the deposit transparent conductive film.
2. following steps are all identical with implementation column 1~17, and other steps of this step are identical with corresponding embodiment.Other steps are identical with respective embodiments, preparation electrically conducting transparent builtup film.
Implementation column 19
1. substrate is anticipated, and processing method is: this transparent conductive film metal acetate solution of spraying one deck on substrate, behind 650 ℃ of 5min that anneal down, treat the deposit transparent conductive film.
2. following steps are all identical with implementation column 1~18, and other steps of this step are identical with corresponding embodiment.Other steps are identical with respective embodiments, preparation electrically conducting transparent builtup film.
Material with the little carbon structure of preparation nanometer, metal nanoparticle and transparent conductive film combining structure is an example, the concentration that wherein contains the little carbon structure solution of nanometer is 0.01mg/mL, the concentration that contains metal nanoparticle solution is 1.0M, the concentration of this transparent conductive film metal nitrate and complexing agent is 20mM, and used raw material and preparation method thereof is as follows:
In the batching step 3 of embodiment 1~19, this used transparent conductive film metal nitrate with oxide or acetate or formates or alkoxide or or diethylate or chlorate or sulfate or subcarbonate replace, the molal quantity of this metallic element is identical, and other steps of this step are identical with corresponding embodiment.Other steps are identical with respective embodiments, preparation electrically conducting transparent builtup film.
Implementation column 21
Material with the little carbon structure of preparation nanometer, metal nanoparticle and transparent conductive film combining structure is an example, the concentration that wherein contains the little carbon structure solution of nanometer is 0.01mg/mL, the concentration that contains metal nanoparticle solution is 1.0M, prepare the metal nitrate of this transparent conductive film and the concentration of complexing agent and be 20mM, used raw material and preparation method thereof is as follows:
In the batching step 3 of embodiment 1~20; the used solution that contains metal nanoparticle is replaced with the solution that contains silver nano-grain or gold nano grain or copper nano particles or iron nano-particle or magnesium nano particle or zirconium nano particle or manganese nano particle or cobalt nano-particle or nano nickel particles or chromium nano particle; the molal quantity of metallic element is identical, and other steps of this step are identical with corresponding embodiment.Other steps are identical with respective embodiments, preparation electrically conducting transparent builtup film.
Implementation column 22
Material with the little carbon structure of preparation nanometer, metal nanoparticle and transparent conductive film combining structure is an example, the concentration that wherein contains the little carbon structure solution of nanometer is 0.01mg/mL, the concentration that contains metal nanoparticle solution is 1.0M, prepare the metal nitrate of this transparent conductive film and the concentration of complexing agent and be 20mM, used raw material and preparation method thereof is as follows:
In the batching step 3 of embodiment 1~21, used metal nanoparticle is replaced with this metal chloride or metal oxide or metal nitrate or metal sulfate or metal carbonate, the molal quantity of this metallic element is identical, and other steps of this step are identical with corresponding embodiment.Other steps are identical with respective embodiments, the preparation builtup film.
Implementation column 23
Material with the little carbon structure of preparation nanometer, metal nanoparticle and transparent conductive film combining structure is an example, the concentration that wherein contains the little carbon structure solution of nanometer is 0.01mg/mL, the concentration that contains metal nanoparticle solution is 1.0M, prepare the metal nitrate of this transparent conductive film and the concentration of complexing agent and be 20mM, used raw material and preparation method thereof is as follows:
In the batching step 3 of embodiment 1~22, used complexing agent is replaced with methenamine, oleyl amine, natrium citricum, ammonium chloride, sucrose, lactose, glucose, EDTA, PVP, ethylene glycol, lauryl sodium sulfate, softex kw, urea, and other steps of this step are identical with corresponding embodiment.
Other steps are identical with respective embodiments, preparation electrically conducting transparent builtup film.
Implementation column 24
Material with the little carbon structure of preparation nanometer, metal nanoparticle and transparent conductive film combining structure is an example, the concentration that wherein contains little carbon nano-structured solution is 0.01mg/mL, the concentration that contains metal nanoparticle solution is 1.0M, prepare the metal nitrate of this transparent conductive film and the concentration of complexing agent and be 20mM, used raw material and preparation method thereof is as follows:
In the batching step 3 of embodiment 1~23, used contain little carbon nano-structured solution with containing graphene oxide or porous graphene oxide or the mono-layer graphite oxide alkene or the double-deck graphene oxide of reduction or having the graphite oxide of functional group or the solution of fullerene or single-walled nanotube or double-walled nanotubes or many walls nanotube is replaced, the molal quantity of little carbon is identical, and other steps of this step are identical with corresponding embodiment.Other steps are identical with respective embodiments, preparation electrically conducting transparent builtup film.
Implementation column 25
With the material for preparing little carbon nano-structured, metal nanoparticle and transparent conductive film combining structure is example, its concentration that contains little carbon nano-structured solution is 0.01mg/mL, the concentration that contains metal nanoparticle solution is 1.0M, prepare the metal nitrate of this transparent conductive film and the concentration of complexing agent and be 20mM, used raw material and preparation method thereof is as follows:
In the batching step 3 of embodiment 1~24, used substrate FTO replaces with float glass, surface-treated float glass, ITO, FTO, cell panel, and other steps are identical with respective embodiments, preparation electrically conducting transparent builtup film.
Implementation column 26
With the material for preparing little carbon nano-structured, metal nanoparticle and transparent conductive film combining structure is example, its concentration that contains little carbon nano-structured solution is 0.01mg/mL, the concentration that contains metal nanoparticle solution is 1.0M, prepare the metal nitrate of this transparent conductive film and the concentration of complexing agent and be 20mM, used raw material and preparation method thereof is as follows:
In the batching step 3 of embodiment 1~25, greater than 50%, other steps are identical with respective embodiments with float glass, surface-treated float glass, ITO, FTO replacement and their transmitance for used substrate FTO, preparation electrically conducting transparent builtup film.
Implementation column 27
With the material for preparing little carbon nano-structured, metal nanoparticle and transparent conductive film combining structure is example, the concentration that wherein contains little carbon nano-structured solution is 0.01mg/mL, the concentration that contains metal nanoparticle solution is 1.0M, prepare the metal nitrate of this transparent conductive film and the concentration of complexing agent and be 20mM, used raw material and preparation method thereof is as follows:
In the batching step 3 of embodiment 1~26, used solvent is replaced with organic solvent, and other steps are identical with respective embodiments, preparation electrically conducting transparent builtup film.
Based on above preparation method, the present invention also proposes a kind of solar battery structure, as described in Figure 3: comprise the solar cell main body, the transparent conductive film of solar cell main body is provided with the combining structure of the little carbon structure of one deck nanometer, metal micro-nano particle and transparent conductive film.
Claims (10)
1. method that improves solar cell current density and battery efficiency, it is characterized in that, by on battery surface, being provided with at least a or multiple combining structure formed of one deck, strengthen the light utilization ratio of battery by the little carbon structure of nanometer, metal micro-nano particle or transparent conductive film; Described combining structure directly prepares at the battery upper surface, perhaps it is prepared on the independent structures, then this structure is placed on the battery top.
2. a kind of method that improves solar cell current density and battery efficiency according to claim 1, it is characterized in that, the little carbon structure of described nanometer is meant: size between 1nm~100nm, the sphere that the carbon structure of the sheet of single or multiple lift or stratiform carbon structure, single wall or many walls, the carbon atom that is not waited by quantity are formed, tubulose, bar-shaped, wire, strip, flower-shaped, sheet, stratiform, dentation or carbon structure that must shape.
3. a kind of method that improves solar cell current density and battery efficiency according to claim 1, it is characterized in that, described metal micro-nano particle is meant: size between 10nm~500nm, the combination of one or more of the major element in the periodic table of elements: IA, IIA, IIIA, IVA, subgroup and group of the lanthanides and actinide metals element.
4. a kind of method that improves solar cell current density and battery efficiency according to claim 1, it is characterized in that described transparent conductive film is meant: light transmittance is greater than 70%, and resistivity is 10
-5The film of the Ω cm order of magnitude.
5. a kind of method that improves solar cell current density and battery efficiency according to claim 1, it is characterized in that, the preparation of the combining structure of the little carbon structure of described nanometer, metal micro-nano particle and transparent conductive film is specially: add " suspension-turbid liquid " that contains little carbon structure of nanometer and metal micro-nano particle in slaine and/or enveloping agent solution, obtain thin film after the drying at room temperature on substrate;
Described slaine is one or more mixtures in inorganic salts or the organic salt; Described slaine material solution is the aqueous solution, and concentration is 0.00001~10M;
Described enveloping agent solution is the aqueous solution, and concentration is 0.00001~10M;
Described " suspension-turbid liquid " that contains the little carbon structure of nanometer is the aqueous solution, and concentration is 0.00001~10mg/mL;
Wherein reaction temperature is 10~250 ℃, is warming up to 250 ℃ by 10 ℃ of speed with 0.01~50 ℃/min, and the reaction time is: 30min~120hrs; The pH value of described solution is 4.5~8.5; Described substrate is selected from a kind of in float glass, surface-treated float glass, ITO, FTO, the battery.
6. a kind of method that improves solar cell current density and battery efficiency according to claim 5 is characterized in that, described slaine is following any one or a few combination:
Nitrate, nitrite, sulfate, sulphite, thiosulfate, carbonate, bicarbonate, acid salt, basic salt, phosphate, phosphite, dibasic alkaliine, dihydric phosphate, phosphoric acid hydrogen disalt, sulfide, chloride, bromide, fluoride, iodide, formates, acetate, citrate, salicylate, sulfonate.
7. a kind of method that improves solar cell current density and battery efficiency according to claim 5 is characterized in that, the little carbon structure of described nanometer is following any one or a few combination:
Graphite, intumescent graphite, Palta type graphite, Graphene, graphene oxide, the Graphene of partial oxidation, reduction Graphene, the Graphene of partial reduction, the Graphene that has functional group, surface have the Graphene of negative electrical charge, and the surface has the Graphene of positive charge, single wall, double-walled, multi-walled carbon nano-tubes, C
60, C
70, C
84C
240, C
540Fullerene.
8. a kind of method that improves solar cell current density and battery efficiency according to claim 5, it is characterized in that described metal micro-nano particle is any or multiple combination in IA, IIA, IIIA, IVA, subgroup and group of the lanthanides and the actinide metals element.
9. a kind of method that improves solar cell current density and battery efficiency according to claim 5, it is characterized in that, described enveloping agent solution is the aqueous solution, replaces this complexing agent with a kind of of methenamine, sucrose, lactose, glucose, EDTA, DMF, PVP, ethylene glycol, polyethylene glycol, lauryl sodium sulfate, softex kw, urea or two kinds or several combinations.
10. a solar battery structure comprises the solar cell main body, it is characterized in that, the transparent conductive film of solar cell main body is provided with the combining structure of the little carbon structure of one deck nanometer, metal micro-nano particle and transparent conductive film.
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