CN102969389A - Manufacturing method and buffer layer repair method for solar thin-film cell - Google Patents
Manufacturing method and buffer layer repair method for solar thin-film cell Download PDFInfo
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- CN102969389A CN102969389A CN2011102696019A CN201110269601A CN102969389A CN 102969389 A CN102969389 A CN 102969389A CN 2011102696019 A CN2011102696019 A CN 2011102696019A CN 201110269601 A CN201110269601 A CN 201110269601A CN 102969389 A CN102969389 A CN 102969389A
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- resilient coating
- film battery
- restorative procedure
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Abstract
The invention discloses a manufacturing method and a buffer layer repair method for a solar thin-film cell. The buffer layer repair method for the solar thin-film cell comprises the steps of Step 1: removing a buffer layer which is checked to be abnormal through a physical method and/or a chemical method; and Step 2: forming the buffer layer again. By the aid of the buffer layer repair method, waste of materials and labors, which is caused by discarding of solar cell substrates when buffer layer film formation is abnormal, can be avoided.
Description
Technical field
The present invention relates to solar cell fabrication process, especially relevant with the manufacture method of a kind of resilient coating restorative procedure and a kind of solar film battery.
Background technology
Solar energy is a kind of regenerative resource of green cleaning, and how better utilizing solar energy is an important problem.Solar cell is a kind of important carrier that utilizes solar energy.Solar film battery (Thin film solar cell), mainly comprise copper indium gallium selenium solar cell (CuInxGa (1-x) Se2 is called for short CIGS), cadmium telluride solar cell (CdTe) and silica-based solar cell (amorphous silicon solar cell) etc.Thin-film solar cells is a kind of important solar cell, and it has lightweight, thin thickness, flexible, portable, good stability, radiation resistance is good, cost low and the efficient advantages of higher.
In the prior art, when making solar film battery, one of them operation is for to form resilient coating (Buffer layer) by chemical bath deposition (CBD) at solar cell substrate, in the process that forms resilient coating, if the chemical bath depositing operation occurs unusual, then can cause the property abnormality of the solar cell substrate after the film forming.
The performance parameter of solar cell substrate comprises short circuit current (Isc[A]), open circuit voltage (Voc[V]), fill factor, curve factor (F.F.[%]) and battery efficiency (Cell eff.[%]) etc., if defective after testing, can only whole solar cell substrate is discarded in the prior art, both improve the manufacturing cost of solar film battery, also caused material and the artificial a large amount of wastes that wait.
Summary of the invention
For problems of the prior art, the object of the present invention is to provide a kind of resilient coating restorative procedure of solar film battery, if can only be with the technical problem of the discarded material that is brought of solar cell substrate and artificial waste when unusual to solve the resilient coating film forming that exists in the prior art.
Another object of the present invention is to provide a kind of manufacture method of solar film battery.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of resilient coating restorative procedure of solar film battery comprises step: step 1: remove check by physical method and/or chemical method and unusual described resilient coating occurs; Step 2: again form described resilient coating.
The manufacture method of solar film battery of the present invention comprises step: form resilient coating at solar battery panel, and described resilient coating is tested; The resilient coating of disqualified upon inspection is repaired with the resilient coating restorative procedure of solar film battery of the present invention.
Beneficial effect of the present invention is, resilient coating restorative procedure of the present invention, when the solar cell substrate after forming resilient coating is defective after testing, no longer directly discard the solar cell substrate with defective resilient coating, but by resilient coating restorative procedure of the present invention, after removing the resilient coating of original film forming, resilient coating is carried out heavy industry, solar cell substrate behind the resilient coating heavy industry, can reach the battery efficiency close with normal flow equally, improved the rate of finished products of solar film battery, reduced the manufacturing cost of solar film battery, avoided material and artificial on waste.
Description of drawings
Fig. 1 is the flow chart of the resilient coating restorative procedure of the embodiment of the invention.
Fig. 2 is the flow chart of the solar film battery manufacture method of the embodiment of the invention.
Embodiment
The exemplary embodiments that embodies feature ﹠ benefits of the present invention will be described in detail in the following description.Be understood that the present invention can have at different embodiment various variations, its neither departing from the scope of the present invention, and explanation wherein and appended accompanying drawing be when the usefulness that explain in itself, but not in order to limit the present invention.
The resilient coating restorative procedure of the embodiment of the invention can be for the solar film battery manufacture method of the embodiment of the invention.And the solar film battery manufacture method of the embodiment of the invention then comprises the resilient coating restorative procedure of the embodiment of the invention.
Solar film battery in the resilient coating restorative procedure of solar film battery of the present invention, CIGS solar cell substrate preferably, but be not limited to this, also can be other thin-film solar cells, for example silica-based solar cell and cadmium telluride solar cell.
As shown in Figure 1, the resilient coating restorative procedure of solar film battery of the present invention, comprise on the whole two large steps, first large step S100 is the step that removes the resilient coating of the unusual solar cell substrate of check appearance by the combination of physical method, chemical method or physical method and chemical method; And second large step is the step that again forms resilient coating on solar cell substrate.The below introduces respectively this two large steps:
As shown in Figure 1, step S100 wherein can be refined as step S120-step S180, is described below successively:
Step 120: wish is removed the substrate immersion of resilient coating in the hydrochloric acid solution that configures, the concentration of hydrochloric acid is 2-10%, normal temperature.
The reaction temperature of hydrochloric acid is that normal temperature gets final product, but can be so that reaction is rapider by heating.
Step 140: by stirring or ultrasonic oscillation so that the chemical reaction in the hydrochloric acid solution accelerate.
In immersion process, hydrochloric acid solution is stirred, purpose is the chemical reaction that accelerates between hydrochloric acid solution and the resilient coating, thereby accelerates the removal process of the unusual resilient coating of film forming.Can use blender to stir, the accelerated reaction process also can use ultrasonic wave to shake with the accelerated reaction process, for example at the container bottom that holds hydrochloric acid solution supersonic generator is set and comes hydrochloric acid solution is carried out ultrasonic oscillation.
Step 160: through 3-10 minute immersion, after resilient coating is all removed, substrate is taken out from hydrochloric acid solution.
For the time of soaking, can determine that according to buffer film layer thickness and removal situation the required soak time of thicker resilient coating is relatively longer.It is also relevant with the concentration of hydrochloric acid to soak required time, in the concentration range of 2-10%, the concentration of hydrochloric acid such as can be 2%, 3%, 5%, 8% with the different values such as 10%, concentration is larger, then removes reacting phase to faster.Those skilled in the art can rest in the time of soaking in the hydrochloric acid solution according to thicknesses of layers and concentration of hydrochloric acid, and the unusual resilient coating of assurance film forming can effectively be removed.
Step 180: the solar cell substrate that will take out from hydrochloric acid solution washes repeatedly with deionized water.
Remove after reaction finishes, acid solution is residual to affect follow-up film forming procedure in order to prevent from existing at solar cell substrate, can do appropriateness to solar cell substrate and clean, and can adopt the cleaning agents such as deionized water during cleaning, and solar cell substrate is washed repeatedly.
Step 200: on substrate, again form resilient coating with chemical bath deposition.
After above-mentioned cleaning process is finished, namely can carry out the again process of film forming resilient coating to solar cell substrate, when again forming resilient coating, can adopt the various techniques of the formation resilient coating of prior art, such as chemical bath deposition etc.
The resilient coating restorative procedure of the embodiment of the invention, after again forming resilient coating, the correction data of the major parameter of solar cell substrate is as shown in table 1:
Table 1
Data shown in the table 1 are to be the related data of 1225 square centimeters solar base plate for an area, as shown in Table 1, the resilient coating restorative procedure of the embodiment of the invention, through the efficiency of element of the solar film battery of resilient coating heavy industry (re-work) with do not pass through the resilient coating heavy industry, the battery efficiency (Cell eff.[%]) that is the N/R solar film battery of resilient coating film forming is close, therefore, resilient coating restorative procedure of the present invention, when causing the resilient coating film forming unusual have unusual when the chemical bath depositing operation, can avoid solar cell substrate integral body to scrap by the resilient coating heavy industry.
But, when carrying out resilient coating restorative procedure of the present invention, should be noted that the concentration of hydrochloric acid, if concentration of hydrochloric acid greater than 10%, will cause the efficiency of element of the solar film battery behind the heavy industry to reduce.As shown in table 2:
Table 2
Shown in the table 2 is the comparative example of a resilient coating restorative procedure of the present invention, data shown in the table 2 are to be the related data of 0.5 square centimeter solar base plate for an area, in this comparative example, demineralizing acid concentration is greater than outside 10%, other reaction time, reaction environment and various parameter are all identical with the resilient coating restorative procedure of the present invention shown in the table 1, but the result of gained shows, the efficiency of element of the solar film battery behind the heavy industry is respectively 6.91% and 6.48, when normal than film forming 17.49% and 18.21% reduces greatly, even is lower than the efficiency of element of film forming before repairing when unusual.
Resilient coating restorative procedure of the present invention, be not limited with as above specific embodiment, for example, for the unusual solar cell substrate of film forming, except with the salt acid soak, the method that also can spray with hydrochloric acid, the concentration of hydrochloric acid during spray, also be 2-10%, the time of spray is also between 3-10 divides.Equally, after spray is removed resilient coating, there is acid solution residual at solar cell substrate, also can repeatedly washes solar cell substrate with deionized water.
And, resilient coating removal method of the present invention, it soaks solar cell substrate or the solution that sprays also is not limited to hydrochloric acid (HCL), also can be certain density sulfuric acid (H
2SO
4), nitric acid (HNO
3), highly acid or the strong alkali solutions such as potassium hydroxide (KOH) or NaOH (NaOH) solution, by corrosion to remove described resilient coating.
Also have, the resilient coating method of removaling of the present invention also is not limited to above-mentioned chemical method, also can be physical method, for example, directly strikes off, directly ultrasonic oscillation is removed or the physical method such as employing laser ablation.Perhaps also can be that physical method and chemical method mutually combine, for example in the above embodiment of the present invention, in salt acid soak solar cell substrate, accelerate the removal process of former resilient coating by ultrasonic oscillation, it namely is the process that a kind of physical method and chemical method combine, ultrasonic oscillation wherein itself also can play the effect of removing resilient coating, also can accelerate hydrochloric acid solution for the corrosiveness of resilient coating simultaneously.
The below introduces the solar film battery manufacture method of the embodiment of the invention again.
The solar film battery manufacture method of the embodiment of the invention as shown in Figure 2, mainly comprises following step:
Form resilient coating at solar battery panel;
Solar battery panel behind the formation resilient coating is tested; Such as the relevant element efficiency parameters such as short circuit current, open circuit voltage and fill factor, curve factor of check.
For the result of check, if be up to the standards, then can enter the subsequent technique that next step solar film battery is made, until form solar film battery.If through check element performance inconsistency lattice, then need the solar cell substrate of disqualified upon inspection is repaired with the resilient coating restorative procedure of the embodiment of the invention, until be up to the standards, then carry out subsequent technique to form solar film battery.
The solar film battery manufacture method of the embodiment of the invention, after forming resilient coating, when defective after testing such as the element efficiency of solar cell substrate, no longer directly discarded, but by the resilient coating restorative procedure of the embodiment of the invention resilient coating is carried out heavy industry, until be up to the standards behind the heavy industry, improved the rate of finished products of solar film battery, reduced the manufacturing cost of solar film battery, avoided material and artificial on waste.
Those skilled in the art should recognize change and the retouching of doing in the situation that does not break away from the scope and spirit of the present invention that the appended claim of the present invention discloses, all belong within the protection range of claim of the present invention.
Claims (10)
1. the resilient coating restorative procedure of a solar film battery, the resilient coating reparation that is used for is characterized in that, described resilient coating restorative procedure comprises step:
Step S100: remove check by physical method and/or chemical method and unusual described resilient coating occurs;
Step S200: again form described resilient coating.
2. the resilient coating restorative procedure of solar film battery as claimed in claim 1 is characterized in that, described chemical method is for utilizing sulfuric acid, nitric acid, potassium hydroxide or sodium hydroxide solution to soak or spraying described resilient coating to remove described resilient coating by corrosion.
3. the resilient coating restorative procedure of solar film battery as claimed in claim 1 is characterized in that, in step 1, utilizes the salt acid soak or sprays described resilient coating to remove described resilient coating by corrosion.
4. the resilient coating restorative procedure of solar film battery as claimed in claim 3 is characterized in that, the concentration of described hydrochloric acid is 2%-10%.
5. the resilient coating restorative procedure of solar film battery as claimed in claim 4 is characterized in that, soaks and time spent of spraying described resilient coating is 3-10 minute.
6. the resilient coating restorative procedure of solar film battery as claimed in claim 5 is characterized in that, removes that repeatedly to clean described solar panel with deionized water behind the described resilient coating residual to remove hydrochloric acid.
7. the resilient coating restorative procedure of solar film battery as claimed in claim 4 is characterized in that, when soaking described resilient coating, stirs described hydrochloric acid solution to accelerate removing speed.
8. the resilient coating restorative procedure of solar film battery as claimed in claim 5 is characterized in that, by the described hydrochloric acid solution of ultrasonic oscillation to accelerate removing speed.
9. the resilient coating restorative procedure of solar film battery as claimed in claim 7 is characterized in that, described hydrochloric acid is the hydrochloric acid of normal temperature.
10. the manufacture method of a solar film battery is characterized in that, comprises step:
Form resilient coating at solar battery panel, and described resilient coating is tested;
The resilient coating of disqualified upon inspection is repaired with the resilient coating restorative procedure of the arbitrary described solar film battery of claim 1-9.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1722474A (en) * | 2004-06-29 | 2006-01-18 | 三洋电机株式会社 | Photovoltaic cell, photovoltaic cell module, method of fabricating photovoltaic cell and method of repairing photovoltaic cell |
| CN101562212A (en) * | 2008-04-18 | 2009-10-21 | 东捷科技股份有限公司 | Method for recycling transparent conducting glass substrate of solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1722474A (en) * | 2004-06-29 | 2006-01-18 | 三洋电机株式会社 | Photovoltaic cell, photovoltaic cell module, method of fabricating photovoltaic cell and method of repairing photovoltaic cell |
| CN101562212A (en) * | 2008-04-18 | 2009-10-21 | 东捷科技股份有限公司 | Method for recycling transparent conducting glass substrate of solar cell |
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Application publication date: 20130313 |