CN102867858A - Conductive substrate with good haze and electrical conductivity - Google Patents
Conductive substrate with good haze and electrical conductivity Download PDFInfo
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- CN102867858A CN102867858A CN2011101969216A CN201110196921A CN102867858A CN 102867858 A CN102867858 A CN 102867858A CN 2011101969216 A CN2011101969216 A CN 2011101969216A CN 201110196921 A CN201110196921 A CN 201110196921A CN 102867858 A CN102867858 A CN 102867858A
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- film
- thin film
- backing plate
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- conductive backing
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Abstract
A conductive substrate with good haze and electrical conductivity comprises a substrate and a thin film unit located on the substrate; the thin film unit comprises a layer of first thin film and a layer of second thin film superimposed together; the first thin film and the second thin film are both selected from the groups consisting of the following materials: tin oxide, zinc oxide, indium oxide and any one combination thereof; and the material of the second thin film contains fluorine. With the cooperation of the first thin film and the second thin film made from specific materials, the conductive substrate disclosed by the invention has good electrical conductivity and high enough haze, maintains visible light transparence above a certain level, and is favorable for the application of thin film solar batteries.
Description
Technical field
The present invention relates to a kind of electrically-conductive backing plate, particularly relate to a kind of electrically-conductive backing plate that is applied to solar cell and has good mist degree and electrical conductivity.
Background technology
Consult Fig. 1, be a kind of known film solar cell 1, comprise: the electrically-conductive backing plate 12, that transparent base material 11, take glass as Main Ingredients and Appearance is formed at the surface of this base material 11 is formed at the epitaxial layer 13 on the surface of this electrically-conductive backing plate 12, and a metal electrode 14.When light enters this epitaxial layer 13 by this base material 11 and this electrically-conductive backing plate 12, the opto-electronic conversion effect occurs and make transform light energy become electric energy at this epitaxial layer 13, and cooperated delivery of electrical energy to outside by this electrically-conductive backing plate 12 and this metal electrode 14.
Yet, because light is not all to convert at once electric energy to after entering epitaxial layer 13, have the light of part can continue to advance, even reflection is left this thin-film solar cells 1 by this electrically-conductive backing plate 12.Therefore for thin-film solar cells 1, stay epitaxial layer 13 transfer transformations for the light that maximum is arranged and become electric energy, this electrically-conductive backing plate 12 is necessary for transparent on the one hand, light for maximum penetrates in this epitaxial layer 13, also must have on the other hand certain mist degree and leave with the reflection of the light in this epitaxial layer 13 of entry deterrence.And this electrically-conductive backing plate 12 must have the transmission that good conductive characteristic is beneficial to electric energy.Therefore, develop a kind of electrically-conductive backing plate 12 that has good mist degree and electrical conductivity concurrently and be considerable problem.
Summary of the invention
The object of the present invention is to provide a kind of electrically-conductive backing plate that utilizes the cooperation of bilayer film and have good mist degree and electrical conductivity.
The present invention has the electrically-conductive backing plate of good mist degree and electrical conductivity, comprise a base material and a film unit that is coated on the surface of this base material, this film unit comprises one deck the first film and one deck the second film that is superimposed, the material of described the first film and the second film all is selected from the group that following material forms: arbitrary combination of tin oxide, zinc oxide, indium oxide and previous materials, and also the material of this second film contains fluorine.
Preferably, the electrically-conductive backing plate with good mist degree and electrical conductivity of the present invention, the mist degree of this electrically-conductive backing plate is not less than 7%, and the sheet resistor of this film unit is not more than 20 Ω/sq.
Preferably, the electrically-conductive backing plate with good mist degree and electrical conductivity of the present invention is not less than 30% for the light transmittance of visible light.
Beneficial effect of the present invention is: the cooperation of the first film and the second film by certain material, make the present invention have good conductivity and reach enough large mist degree, light transmittance for visible light also remains on certain above level, is conducive to the application of thin-film solar cells.
Description of drawings
Fig. 1 is a kind of schematic diagram of known film solar cell;
Fig. 2 is the schematic diagram of a thin-film solar cells, shows that simultaneously the present invention has the preferred embodiment of the electrically-conductive backing plate of good mist degree and light transmittance;
Fig. 3 is light transmittance with respect to the curve chart of optical wavelength (unit for how rice (nm)), shows that the light transmittance of the preferred embodiment and a comparative example is along with the variation of wavelength.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
Consult Fig. 2, the present invention has a preferred embodiment of the electrically-conductive backing plate 2 of good mist degree and light transmittance, to be applied in the thin-film solar cells 3, this thin-film solar cells 3 is except comprising this electrically-conductive backing plate 2, also comprise an epitaxial layer 31 that is positioned at these electrically-conductive backing plate 2 belows and is used for transform light energy is become electric energy, and one cooperates the electrode layer 32 that electric energy is exported to the outside with this electrically-conductive backing plate 2.Described electrically-conductive backing plate 2 comprises: one is positioned at the top and towards the base material 21 of a side of light incident, and a film unit 22 that is coated on these base material 21 surfaces.
The material of described base material 21 does not have particular restriction, if light-permeable just can, glass material for example.
This film unit 22 comprises that one deck is positioned at the first film 221 on these base material 21 surfaces, and the second film 222 of being superimposed of one deck and this first film 221.The main material of this first film 221 and this second film 222 all is selected from the group that following material forms: tin oxide (SnO
x), zinc oxide (ZnO
x), indium oxide (InO
x) and arbitrary combination of previous materials.And the material of this second film 222 also to contain in addition percentage by weight be 10% fluorine.In addition, this first film 221 and the second film 222 can also be doped with tin (Sn).
The manufacture method of this first film 221 is that these base material 21 temperature are raise, and continues to spray one first conduction plating bath in base material 21 surfaces, and this process was carried out after tens of minutes, just can make by formed this first film 221 of this first conduction plating bath.The manufacture method of this second film 222 is to continue to spray one second conduction plating bath on the surface of this first film 221, and this process was carried out after tens of minutes, just can make by formed this second film 222 of this second conduction plating bath.The mode of above-mentioned formation the first film 221 and the second film 222 is spraying cracking process (spray pyrolysis method).
In the present embodiment, the main component of this first conduction plating bath comprises tin trichloride (SnCl
3), stannous chloride (SnCl
2), methyl alcohol (CH
3OH) and pure water, main component of this second conduction plating bath comprises butter of tin (SnCl
4), ammonium fluoride (NH
4F), methyl alcohol and pure water, that is to say that this second conduction plating bath contains fluorine, just can make doped with fluorine in these the second film 222 materials of its formation.
Need to prove, the present invention also can contain the second film 222 of fluorine prior to forming this on the base material 21 when implementing, form this again and do not contain the first film 221 of fluorine on this second film 222, that is to say that the up and down order of the first film 221 and the second film 222 can be put upside down.
The first film 221 of the present invention has higher mist degree with respect to the second film 222, and this second film 222 that is doped with fluorine has higher conductivity with respect to the first film 221, under the collocation of the first film 221 and the second film 222, make this electrically-conductive backing plate 2 have satisfactory electrical conductivity and enough mist degrees, can also keep certain light transmission simultaneously.This electrically-conductive backing plate 2 must have certain mist degree and be reflected with the light of this epitaxial layer 31 of entry deterrence and leave this battery, and preferably, the mist degree of this electrically-conductive backing plate 2 is not less than 7%; In addition, this film unit 22 will have good conductivity, just can have good electrical transmission effect, and preferably, the sheet resistor of this film unit 22 (sheet resistance) is not more than 20 Ω/sq.This electrically-conductive backing plate 2 will have good light transmittance, just can make incident ray easily by this electrically-conductive backing plate 2 and enter this epitaxial layer 31, so preferably this electrically-conductive backing plate 2 is not less than 30% for the light transmittance of visible light.
Consult table one, be the test result of the sheet resistor of the mist degree of the electrically-conductive backing plate of the present invention, comparative example 1 and comparative example 2 and film unit.Wherein, the film unit of comparative example 1 only comprises the rete that one deck is same as the second film 222 (containing fluorine) of the present invention, and the film unit of comparative example 2 only comprises the rete that one deck is same as the first film 221 of the present invention (not fluorine-containing).Its test mode then is described:
(1) mist degree test: using " Perkin Elmer company ", model is the mist degree measurement instrument of " Lambda 750 ", carries out the mist degree test of each sample according to the standard mist degree method of testing of ASTM 1003.
(2) sheet resistor test: use " the four-point probe surface resistance value measurement system QTI-Model5601Y/QT50 " of " moral skill company " to test, this measurement system mainly is comprised of surface resistance tester 5601Y and four-point probe test platform QT-50.Test process is that each sample is positioned over respectively on the microscope carrier of four-point probe test platform QT-50, makes probe press downward in the sample from syringe needle again and is obtained the sheet resistor value of sample by surface resistance tester 5601Y.
Can be found out that by experimental result the film of comparative example 1 is to be made by fluorine material, its sheet resistor is 9.8 Ω/sq, and the use that meets solar cell must be asked, but the mist degree of its substrate integral body only has 5.85%, and mist degree is excessively low, is unfavorable for light is retained in epitaxial layer 31.Although it is 42.12% that the substrate of comparative example 2 has enough mist degrees, the sheet resistor value of its film is also larger, and conductivity is not good.Review film unit 22 of the present invention and utilize the first film 221 and the second film 222 to cooperate, can take into account conductivity and mist degree demand, make the present invention have satisfactory electrical conductivity and enough mist degrees.
[table]
Consult Fig. 2,3, Fig. 3 is that the light transmittance of the present invention and comparative example 1 is with respect to the curve chart of wavelength, show that electrically-conductive backing plate 2 of the present invention for comparative example 1, has good light transmittance at visible light and near infrared light wave band, can make more light by entering the inside of battery.Therefore the present invention has in the situation of enough mist degrees, still has certain above light transmittance.
In sum, the present invention is by the cooperation of the first film 221 and second film 222 of certain material, make electrically-conductive backing plate 2 have good conductivity and enough large mist degrees, also remain on level more than certain for the light transmittance of visible light, be conducive to the application of thin-film solar cells 3.
Claims (3)
1. electrically-conductive backing plate with good mist degree and electrical conductivity, comprise a base material, it is characterized in that: described electrically-conductive backing plate also comprises a film unit that is coated on described substrate surface, described film unit comprises one deck the first film and one deck the second film that is superimposed, the material of described the first film and the second film all is selected from the group that following material forms: arbitrary combination of tin oxide, zinc oxide, indium oxide and previous materials, and also the material of described the second film contains fluorine.
2. the electrically-conductive backing plate with good mist degree and electrical conductivity according to claim 1, it is characterized in that: the mist degree of described electrically-conductive backing plate is not less than 7%, and the sheet resistor of described film unit is not more than 20 Ω/sq.
3. the electrically-conductive backing plate with good mist degree and electrical conductivity according to claim 1 and 2, it is characterized in that: described electrically-conductive backing plate is not less than 30% for the light transmittance of visible light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101969216A CN102867858A (en) | 2011-07-08 | 2011-07-08 | Conductive substrate with good haze and electrical conductivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101969216A CN102867858A (en) | 2011-07-08 | 2011-07-08 | Conductive substrate with good haze and electrical conductivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102867858A true CN102867858A (en) | 2013-01-09 |
Family
ID=47446587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101969216A Pending CN102867858A (en) | 2011-07-08 | 2011-07-08 | Conductive substrate with good haze and electrical conductivity |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2812303Y (en) * | 2005-03-09 | 2006-08-30 | 南开大学 | Equipment for nano-oxide nesa preparation by means of ultrasonic rapid deposition |
| CN101527325A (en) * | 2009-04-03 | 2009-09-09 | 中国南玻集团股份有限公司 | Transparent conductive substrate for solar cell |
| CN101567396A (en) * | 2009-05-27 | 2009-10-28 | 中国南玻集团股份有限公司 | Transparent conductive substrate for solar battery |
| CN102067243A (en) * | 2008-06-24 | 2011-05-18 | 日本曹达株式会社 | Transparent conductive film having FTO/ITO multilayer body |
| CN102067375A (en) * | 2008-06-24 | 2011-05-18 | 松下电工株式会社 | Dye-sensitized solar cell |
| CN102106033A (en) * | 2008-09-19 | 2011-06-22 | 日本电气硝子株式会社 | Substrate for solar cell and oxide semiconductor electrode for dye-sensitized solar cell |
-
2011
- 2011-07-08 CN CN2011101969216A patent/CN102867858A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2812303Y (en) * | 2005-03-09 | 2006-08-30 | 南开大学 | Equipment for nano-oxide nesa preparation by means of ultrasonic rapid deposition |
| CN102067243A (en) * | 2008-06-24 | 2011-05-18 | 日本曹达株式会社 | Transparent conductive film having FTO/ITO multilayer body |
| CN102067375A (en) * | 2008-06-24 | 2011-05-18 | 松下电工株式会社 | Dye-sensitized solar cell |
| CN102106033A (en) * | 2008-09-19 | 2011-06-22 | 日本电气硝子株式会社 | Substrate for solar cell and oxide semiconductor electrode for dye-sensitized solar cell |
| CN101527325A (en) * | 2009-04-03 | 2009-09-09 | 中国南玻集团股份有限公司 | Transparent conductive substrate for solar cell |
| CN101567396A (en) * | 2009-05-27 | 2009-10-28 | 中国南玻集团股份有限公司 | Transparent conductive substrate for solar battery |
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Application publication date: 20130109 |