CN1933192A - Non-cadmium solar cell dampening layer and solar cell forming method - Google Patents
Non-cadmium solar cell dampening layer and solar cell forming method Download PDFInfo
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- CN1933192A CN1933192A CNA2005101034133A CN200510103413A CN1933192A CN 1933192 A CN1933192 A CN 1933192A CN A2005101034133 A CNA2005101034133 A CN A2005101034133A CN 200510103413 A CN200510103413 A CN 200510103413A CN 1933192 A CN1933192 A CN 1933192A
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Abstract
This invention relates to a method for forming buffer layers of Cd free solar energy cells, which provides Zn alcohol salt, then adds an alcohol solution in the salt to form a mixed solution to be added with water for hydration reaction to form a Zn oxide solution, after that, the solution is coated on a matrix to be sulfurized or selenized to form a ZnS film or a ZnSe film, which forms a buffer layer of Cd free solar energy cells with the sol-gel method to form a ZnS film or a ZnSe film to replace the CdS film.
Description
Technical field
The present invention relates to a kind of formation method of semiconductor element, particularly relate to a kind of formation method of not having the solar cell resilient coating and the solar cell of cadmium.
Background technology
In recent years, because science and technology is flourish,, therefore causes natural resourcess such as oil, coal gas, natural gas to apply and use for the demand of the energy thereby increase year by year.In addition, also because the new line of environmental consciousness makes the development of the reproducibility energy therefore come into one's own.The reproducibility energy comprises solar energy, tidal energy, geothermal energy, convection current energy, wind-force, waterpower etc., and wherein again with the tool development potentiality of solar energy, most widely used because of it, utilance and feasibility are the highest.
Solar cell is the main invention of effective applied solar energy, and it is to utilize the photovoltaic special efficacy to answer (photovoltaic effect), absorbing light is directly changed into the device of electric energy.In the typical solar cell be with cadmium sulfide (CdS) film as resilient coating, cadmium sulphide film edge energy (band gap) lower (about 2.4eV), it can limit the further raising of solar cell usefulness.And cadmium metal is a heavy metal, and it has toxicity, and cadmium metal is listed in tubing products in the environmental protection pact.Therefore, the development trend of solar cell is that other compounds of development replace cadmium sulfide at present, to solve environmental issue.
Summary of the invention
The objective of the invention is to, a kind of formation method of solar cell resilient coating of new no cadmium is provided, technical problem to be solved is to make its problem that can avoid producing cadmium pollution, thereby is suitable for practicality more.
Another object of the present invention is to, a kind of formation method of solar cell is provided, technical problem to be solved is to make its usefulness that can improve solar cell, thereby is suitable for practicality more.
According to above-mentioned and other purpose, the present invention proposes a kind of formation method of not having the solar cell resilient coating of cadmium, and the method is for providing zinc metal alkoxide earlier.Then, in zinc metal alkoxide, add first alcohol solution, form a mixed solution.Then, in mixed solution, add entry,, form the zinc metal oxide solution to carry out hydration reaction.Afterwards, the zinc metal oxide solution is coated on the base material.Continue it, carry out vulcanizing treatment step or selenizing treatment step, to form ZnS-film or zinc selenide film.
Described according to embodiments of the invention, the first above-mentioned alcohol solution for example is a methyl alcohol.
Described according to embodiments of the invention, above-mentioned base material for example is a glass substrate.
Described according to embodiments of the invention, above-mentioned zinc metal alkoxide is to utilize the zinc slaine and second alcohol solution to react and obtain.Second alcohol solution for example is a methyl alcohol.
The present invention proposes a kind of formation method of solar cell in addition, and it is to form earlier metal electrode in substrate.Then, on metal electrode, form the resilient coating of no cadmium.Above-mentioned, the formation method of resilient coating is for providing zinc metal alkoxide earlier.Then, in zinc metal alkoxide, add first alcohol solution, form a mixed solution.Then, in mixed solution, add entry,, form the zinc metal oxide solution to carry out hydration reaction.Afterwards, the zinc metal oxide solution is coated on the base material.Continue it, carry out vulcanizing treatment step or selenizing treatment step, to form ZnS-film or zinc selenide film.Then, after forming resilient coating, on resilient coating, form absorbed layer, conductive layer and anti-reflecting layer more in regular turn.
Described according to embodiments of the invention, the first above-mentioned alcohol solution for example is a methyl alcohol.
Described according to embodiments of the invention, above-mentioned base material for example is a glass substrate.
Described according to embodiments of the invention, above-mentioned zinc metal alkoxide is to utilize the zinc slaine and second alcohol solution to react and obtain.Second alcohol solution for example is a methyl alcohol.
The present invention utilizes sol-gel (sol-gel) method to form ZnS-film or zinc selenide film, replaces existing known cadmium sulfide resilient coating, thus can avoid producing the cadmium metal pollution problems, and it is also comparatively simple and easy on making.And, the edge energy (bandgap) of formed ZnS-film and zinc selenide film, its edge energy that all has known cadmium sulphide film now is also high, therefore can improve the usefulness of solar cell more.
Via as can be known above-mentioned, the invention relates to a kind of formation method of not having the solar cell resilient coating of cadmium, the method is for providing zinc metal alkoxide earlier.Then, in zinc metal alkoxide, add first alcohol solution, form a mixed solution.Then, in mixed solution, add entry,, form the zinc metal oxide solution to carry out hydration reaction.Afterwards, the zinc metal oxide solution is coated on the base material.Continue it, carry out vulcanizing treatment step or selenizing treatment step, to form ZnS-film or zinc selenide film.
By technique scheme, the present invention does not have the solar cell resilient coating of cadmium and the formation method of solar cell has following advantage at least:
1. the present invention is the solar cell resilient coating that forms no cadmium with sol-gel (sol-gel) method, and its method can be comparatively simple and easy, and can save the processing procedure cost.
2. the present invention forms ZnS-film or zinc selenide film replacement cadmium sulphide film with sol-gel (sol-gel) method, therefore can solve the cadmium metal pollution problems.And the edge energy of ZnS-film and the zinc selenide film all edge energy than cadmium sulphide film is also high, so help to improve more the usefulness of solar cell.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the flow chart of steps according to the formation method of the solar cell resilient coating of the no cadmium of the embodiment of the invention.
Fig. 2 is the generalized section according to the solar cell that one embodiment of the invention illustrated.
100,110,120,130,140: step
200: substrate 202: metal electrode
204: resilient coating 206: absorbed layer
208: conductive layer 210: anti-reflecting layer
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, the solar cell resilient coating of the no cadmium that foundation the present invention is proposed and its embodiment of formation method, method, step, feature and the effect thereof of solar cell, describe in detail as after.
The present invention utilizes sol-gel (sol-gel) manufactured zinc sulphide (ZnS) film or zinc selenide (ZnSe) film to replace existing known cadmium sulfide (CdS) resilient coating, to solve the cadmium metal pollution problems.In following examples, be to be that example is done explanation with the ZnS-film.
Fig. 1 is the flow chart of steps according to the formation method of the solar cell resilient coating of the no cadmium of the embodiment of the invention.
In another embodiment, the formation method of zinc selenide film is to form the zinc metal oxide solution, and after coating it on base material, with the vulcanizing treatment step in the selenizing treatment step step of replacing 140, and, can form the zinc selenide film to feed hydrogen selenide gas replacement hydrogen sulfide gas.
It should be noted that, the edge energy of formed ZnS-film (band gap) is about 3.8eV, and the edge energy of zinc selenide film (band gap) is about 2.7eV, the two edge energy (about 2.4eV) that all has known cadmium sulphide film now is also high, therefore helps to improve more the usefulness of solar cell.On the other hand, sol-gel used in the present invention (sol-gel) method is novel and comparatively easy method.
Below, describe in detail and utilize method of the present invention to form ZnS-film.
At first, zinc metallic element and hydrochloric acid are reacted, to form zinc chloride.Then, zinc chloride is dissolved in the methyl alcohol, and adds suitable stirring and temperature controlling, obtain zinc metal alkoxide.Then, get an amount of zinc metal alkoxide, form a mixed solution.Continue it, add entry in mixed solution, then zinc metal alkoxide and water can carry out hydration reaction, and form zinc oxide solution.Afterwards, with formed zinc oxide solution coat on glass substrate.Then, carry out a vulcanizing treatment step, so that zinc oxide becomes ZnS-film.
Similarly, the formation method of zinc selenide film is, forming zinc oxide solution, and after being distributed on the glass substrate, carrying out a selenizing treatment step, can form it, repeats no more in this.
Next, illustrate and utilize method of the present invention to form solar cell.Fig. 2 is the generalized section according to the solar cell that one embodiment of the invention illustrated.
See also shown in Figure 2ly, the formation method of solar cell is to form metal electrode 202 in substrate 200 in regular turn.Wherein, the material of substrate 200 for example is glass, metal or polymer.The material of metal electrode 202 for example is molybdenum or aluminium.In addition, the substrate 200 of solar cell and the formation method of metal electrode 202 personnel in field are for this reason known, and repeat no more in this.
Then, on metal electrode 202, form resilient coating 204.The material of this resilient coating 204 is ZnS-film or zinc selenide film, and it is to utilize the mentioned sol-gel process of the foregoing description made.Therefore, can solve the cadmium pollution problem that has known cadmium sulfide (CdS) resilient coating now.
Afterwards, on resilient coating 204, form absorbed layer 206, conductive layer 208 and anti-reflecting layer 210 in regular turn.Above-mentioned, the material of absorbed layer 206 for example is copper/indium/gallium/selenium or copper/indium/metal alloy films such as selenium, and the material of conductive layer 208 is a transparent conductive metal oxide film.Reflection of light is avoided in acting as of anti-reflecting layer 210, to increase the absorption of light.Certainly, the formation method of absorbed layer 206, conductive layer 208 and anti-reflecting layer 210 and the material personnel in field are for this reason known, and repeat no more in this.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the method that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (10)
1, a kind of formation method of not having the solar cell resilient coating of cadmium is characterized in that it may further comprise the steps:
One zinc metal alkoxide is provided;
In this zinc metal alkoxide, add one first alcohol solution, form a mixed solution;
In this mixed solution, add entry, form a zinc metal oxide solution to carry out hydration reaction;
This zinc metal oxide solution is coated on the base material; And
Carry out a vulcanizing treatment step or a selenizing treatment step, to form a ZnS-film or a zinc selenide film.
2, the formation method of the solar cell resilient coating of no cadmium according to claim 1 is characterized in that wherein said first alcohol solution comprises methyl alcohol.
3, the formation method of the solar cell resilient coating of no cadmium according to claim 1 is characterized in that wherein said base material comprises glass substrate.
4, the formation method of the solar cell resilient coating of no cadmium according to claim 1 is characterized in that wherein said zinc metal alkoxide is to utilize a zinc slaine and one second alcohol solution to react and obtain.
5, the formation method of the solar cell resilient coating of no cadmium according to claim 4 is characterized in that wherein said second alcohol solution comprises methyl alcohol.
6, a kind of formation method of solar cell is characterized in that it may further comprise the steps:
In a substrate, form a metal electrode;
Form a resilient coating of no cadmium on this metal electrode, wherein the formation method of this resilient coating may further comprise the steps:
One zinc metal alkoxide is provided;
In this zinc metal alkoxide, add one first alcohol solution, form a mixed solution;
In this mixed solution, add entry, form a zinc metal oxide solution to carry out hydration reaction;
This zinc metal oxide solution is coated on the base material; And
Carry out a vulcanizing treatment step or a selenizing treatment step, to form a ZnS-film or a zinc selenide film; And
On this resilient coating, form an absorbed layer, a conductive layer and an anti-reflecting layer in regular turn.
7, the formation method of solar cell according to claim 6 is characterized in that wherein said first alcohol solution comprises methyl alcohol.
8, the formation method of solar cell according to claim 6 is characterized in that wherein said base material comprises glass substrate.
9, the formation method of solar cell according to claim 6 is characterized in that wherein said zinc metal alkoxide is to utilize a zinc slaine and one second alcohol solution to react and obtain.
10, the formation method of solar cell according to claim 9 is characterized in that wherein said second alcohol solution comprises methyl alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2005101034133A CN1933192A (en) | 2005-09-15 | 2005-09-15 | Non-cadmium solar cell dampening layer and solar cell forming method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2005101034133A CN1933192A (en) | 2005-09-15 | 2005-09-15 | Non-cadmium solar cell dampening layer and solar cell forming method |
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| CN1933192A true CN1933192A (en) | 2007-03-21 |
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| CNA2005101034133A Pending CN1933192A (en) | 2005-09-15 | 2005-09-15 | Non-cadmium solar cell dampening layer and solar cell forming method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397666B (en) * | 2007-09-29 | 2010-08-04 | 中国人民解放军装甲兵工程学院 | Zn/ZnS composite solid lubrication film and preparation method thereof |
| CN102254998A (en) * | 2011-07-18 | 2011-11-23 | 中国科学院深圳先进技术研究院 | Cadmium-free CuInGaSe thin film solar cell assembly and preparing method of zinc sulfide buffer layer thin film thereof |
-
2005
- 2005-09-15 CN CNA2005101034133A patent/CN1933192A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397666B (en) * | 2007-09-29 | 2010-08-04 | 中国人民解放军装甲兵工程学院 | Zn/ZnS composite solid lubrication film and preparation method thereof |
| CN102254998A (en) * | 2011-07-18 | 2011-11-23 | 中国科学院深圳先进技术研究院 | Cadmium-free CuInGaSe thin film solar cell assembly and preparing method of zinc sulfide buffer layer thin film thereof |
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