CN202564379U - Screen structure of solar cell - Google Patents
Screen structure of solar cell Download PDFInfo
- Publication number
- CN202564379U CN202564379U CN 201220242987 CN201220242987U CN202564379U CN 202564379 U CN202564379 U CN 202564379U CN 201220242987 CN201220242987 CN 201220242987 CN 201220242987 U CN201220242987 U CN 201220242987U CN 202564379 U CN202564379 U CN 202564379U
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- solar battery
- battery sheet
- grid lines
- thin grid
- solar cell
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Abstract
The utility model discloses a screen structure of solar cells. The screen structure comprises a square silicon wafer, the light receiving surface of the silicon wafer is provided with a plurality of main grid lines and a plurality of fine grid lines, wherein the plurality of marginal secondary grid lines are mutually arranged in parallel, the plurality of fine grid lines are mutually arranged in parallel, and the fine grid lines are perpendicular to the main grid lines; and a distance between every two adjacent fine grid lines in the central zone of the solar cell plate is smaller than a distance between every two adjacent fine grid lines in the marginal zones of the solar cell plate. By adopting the structure, the screen structure is simple in structure, easy to realize, can save the cost, and can improve the electric energy conversion efficiency.
Description
Technical field
The utility model relates to the photovoltaic field, specifically is the half tone structure of solar cell.
Background technology
People use POCL always
3Liquid source spreads the PN junction of making crystal silicon solar energy battery; In the process of making PN junction, the use amount in phosphorus source is many more, and the uniformity of diffusion back solar battery sheet is good more; The phosphorus concentration on solar battery sheet surface, diffusion back is big more; When the surperficial phosphorus concentration of solar battery sheet acquires a certain degree, will cause heavy doping effect, the energy gap of solar battery sheet near surface will be shunk and narrowed down, thereby causes the open circuit voltage of solar cell to descend.Simultaneously high doping content can increase the probability of auger recombination, makes to form the minority carrier life time step-down of solar battery sheet near surface " dead layer ", and then cause the open circuit voltage of solar cell and short circuit current all to reduce.
In order to reduce all drawbacks that cause because of heavy doping; People adopt the method system PN junction of gently mixing; Gently mixing to need to reduce the consumption in phosphorus source, but phosphorus source amount gets into the big of solar battery sheet fringe region because air-flow gets into the difficulty of solar battery sheet central area after reducing, and the air-flow environment that the central area touches is thin than fringe region; Cause the square resistance of solar battery sheet central area higher; And the square resistance of solar battery sheet fringe region is less, so light dope can cause solar battery sheet uniformity variation, and then can have influence on the electric energy conversion efficiency of solar cell.How to lightly doped solar battery sheet characteristic existing solar cell to be carried out architecture advances, and then make it can improve the efficient that electric energy transforms, this becomes present people's question of common concern, yet does not see relevant structure and report now.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art, and a kind of saving cost is provided, and can improve the half tone structure of the solar cell of electric energy conversion efficiency.
The purpose of the utility model mainly realizes through following technical scheme: the half tone structure of solar cell; Comprise square solar battery sheet; The sensitive surface of said solar battery sheet is provided with many main grid lines and many thin grid lines; Said many main grid lines laterally arrange each other, and many thin grid lines laterally arrange each other, the vertical main grid line of said thin grid line; Spacing between adjacent two thin grid lines of said solar battery sheet central area is less than the spacing between adjacent two thin grid lines of solar battery sheet fringe region.After the solar battery sheet of the utility model is processed through lightly doped mode; Because air-flow gets into the difficulty of solar battery sheet central area and gets into the big of solar battery sheet fringe region; The air-flow environment that the central area touches is thin than fringe region; It can hinder bigger zone and the less zone of resistance, side in the side of appearance, and wherein, the side hinders bigger regional centralized in the central part of solar battery sheet; And resistance less regional centralized in side is in the edge of solar battery sheet, and the central area of specifically defining of the utility model is judged through the size that the side of mensuration hinders with fringe region.The utility model is through after being provided with, and the density of the thin grid line that the zone that resistance is bigger in solar battery sheet side is provided with is big, and the density of the thin grid line that the less zone of resistance is provided with in solar battery sheet side is little.
On the line of demarcation of said solar battery sheet central area and solar battery sheet fringe region arbitrarily a bit apart from this near the solar battery sheet seamed edge between distance between solar battery sheet seamed edge length 1/4～1/3, and all point equates apart from the minimum distance of solar battery sheet seamed edge on the line of demarcation of solar battery sheet central area and solar battery sheet fringe region.In order to guarantee the conversion efficiency of solar cell, the utility model is limited in the reasonable range the central area and the fringe region of solar battery sheet, and side's resistance of mensuration also should meet this area requirement.
Distance between adjacent two the thin grid lines in said solar battery sheet central area is 1.5mm～1.9mm, and the distance between adjacent two the thin grid lines of said solar battery sheet fringe region is 1.9mm～2.5mm.
The quantity of said main grid line is two.The quantity that the utility model preferably is provided with the main grid line is two, and two main grid lines are connected with the thin grid line two ends that are arranged on the solar battery sheet central area respectively when specifically being provided with, thereby are convenient to the electric current that thin grid line is collected is compiled.
Two horizontal seamed edges of the parallel solar battery sheet of said thin grid line, two vertical seamed edges of said main grid line parallel solar battery sheet.The utility model with the equal seamed edge of parallel solar battery sheet of thin grid line and main grid line, so, is convenient to the shaping of grid line, and can be guaranteed when every thin grid line compiles electric current even when being provided with.
Compared with prior art; The utlity model has following beneficial effect: the utility model is high to the solar battery sheet central area side resistance that the light dope phosphorus concentration is processed PN junction, and the low defective of fringe region side's resistance, the utility model with the spacing between adjacent two thin grid lines of solar battery sheet central area less than the spacing between adjacent two thin grid lines of solar battery sheet fringe region; Even carefully moire grids density is big in side's resistance high zone; And resistance low thin grid line relative density in side is less, and the regional lateral resistance that side's resistance is big is just big more, and the utility model carries out electric current collection through more intensive thin grid line; The bar number of the thin grid line of area decreases that side's resistance is little is to increase the light-receiving area of solar battery sheet; Thereby make transformation efficiency reach optimum state, and then improved electric energy conversion efficiency, improved economic benefit; Because of the PN junction of the solar battery sheet of the utility model adopts lightly doped mode to realize; This has just reduced the consumption in phosphorus source; And the utility model is through reasonably being provided with the density of thin grid line; This can reduce the silver slurry consumption of processing all grid lines of the utility model, and therefore, the utility model is saved production cost.
Description of drawings
Fig. 1 is the plan structure sketch map of the utility model embodiment.
The pairing name of Reference numeral is called in the accompanying drawing: 1, solar battery sheet, 2, the main grid line, 3, thin grid line.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is done further to specify, but the execution mode of the utility model is not limited thereto.
Embodiment:
As shown in Figure 1, the half tone structure of solar cell comprises square solar battery sheet 1; Wherein, the sensitive surface of solar battery sheet 1 is provided with many main grid lines 2 and many thin grid lines 3, and many main grid lines 2 laterally arrange each other; Many thin grid line 3 also laterally arranges each other; Two horizontal seamed edges of thin grid line 3 parallel solar battery sheets 1, two vertical seamed edges of main grid line 2 parallel solar battery sheets 1, promptly thin grid line 3 vertical main grid lines 2.Solar battery sheet 1 is in the process of making; Because air-flow gets into the difficulty of solar battery sheet 1 central area and gets into the big of solar battery sheet 1 fringe region; The air-flow environment that the central area touches is thin than fringe region; It can hinder bigger zone and the less zone of resistance, side in the side of appearance, and wherein, the side hinders bigger regional centralized in the central area of solar battery sheet 1; And the side hinders less regional centralized in the fringe region of solar battery sheet 1; Spacing between adjacent two thin grid lines 3 of solar battery sheet 1 central area is less than the spacing between adjacent two thin grid lines 3 of solar battery sheet 1 fringe region, i.e. thin grid line 3 density in the big zone of solar battery sheet 1 side resistance are greater than thin grid line 3 density of solar battery sheet 1 side resistance than the zonule, side's resistance bigger and less be comparison between relative.As preferably; On the line of demarcation of solar battery sheet 1 central area and solar battery sheet 1 fringe region arbitrarily a bit apart from this near solar battery sheet 1 seamed edge between distance between solar battery sheet 1 seamed edge length 1/4～1/3, and all point equates apart from the minimum distance of solar battery sheet 1 seamed edge on the line of demarcation of solar battery sheet 1 central area and solar battery sheet 1 fringe region.Distance between adjacent two the thin grid lines 3 in solar battery sheet 1 central area is 1.5mm～1.9mm, and the distance between adjacent two the thin grid lines 3 of solar battery sheet 1 fringe region is 1.9mm～2.5mm.The quantity of main grid line 2 is preferably two, and the closeer regional centralized of thin grid line 3 is between two main grid lines 2, and the thin grid line 3 between two main grid lines 2 all is connected with main grid line 2.
As stated, then can well realize the utility model.
Claims (5)
1. the half tone structure of solar cell; It is characterized in that: comprise square solar battery sheet (1); The sensitive surface of said solar battery sheet (1) is provided with many main grid lines (2) and many thin grid lines (3); Said many main grid lines (2) laterally arrange each other, and many thin grid lines (3) laterally arrange each other, the vertical main grid line (2) of said thin grid line (3); Spacing between adjacent two thin grid lines (3) of said solar battery sheet (1) central area is less than the spacing between adjacent two thin grid lines (3) of solar battery sheet (1) fringe region.
2. the half tone structure of solar cell according to claim 1; It is characterized in that: on the line of demarcation of said solar battery sheet (1) central area and solar battery sheet (1) fringe region arbitrarily a bit apart from this near solar battery sheet (1) seamed edge between distance be positioned between solar battery sheet (1) the seamed edge length 1/4～1/3, and all point equates apart from the minimum distance of solar battery sheet (1) seamed edge on the line of demarcation of solar battery sheet (1) central area and solar battery sheet (1) fringe region.
3. the half tone structure of solar cell according to claim 1; It is characterized in that: the distance between adjacent two the thin grid lines in said solar battery sheet (1) central area (3) is 1.5mm～1.9mm, and the distance between adjacent two the thin grid lines of said solar battery sheet (1) fringe region (3) is 1.9mm～2.5mm.
4. the half tone structure of solar cell according to claim 1, it is characterized in that: the quantity of said main grid line (2) is two.
5. according to the half tone structure of each described solar cell of claim 1～4; It is characterized in that: two horizontal seamed edges of the parallel solar battery sheet of said thin grid line (3) (1), two vertical seamed edges of the parallel solar battery sheet of said main grid line (2) (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220242987 CN202564379U (en) | 2012-05-28 | 2012-05-28 | Screen structure of solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220242987 CN202564379U (en) | 2012-05-28 | 2012-05-28 | Screen structure of solar cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202564379U true CN202564379U (en) | 2012-11-28 |
Family
ID=47214004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220242987 Expired - Fee Related CN202564379U (en) | 2012-05-28 | 2012-05-28 | Screen structure of solar cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202564379U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103034050A (en) * | 2013-01-15 | 2013-04-10 | 北京市合众创能光电技术有限公司 | High-precision silver grid line screen production method for crystalline silicon solar cells |
| CN106981525A (en) * | 2017-03-03 | 2017-07-25 | 浙江爱旭太阳能科技有限公司 | P-type double-sided solar battery and preparation method thereof |
| CN114078983A (en) * | 2020-08-10 | 2022-02-22 | 苏州阿特斯阳光电力科技有限公司 | Photovoltaic module |
| CN114695574A (en) * | 2022-04-27 | 2022-07-01 | 浙江爱康光电科技有限公司 | Heterojunction battery piece without main grid |
-
2012
- 2012-05-28 CN CN 201220242987 patent/CN202564379U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103034050A (en) * | 2013-01-15 | 2013-04-10 | 北京市合众创能光电技术有限公司 | High-precision silver grid line screen production method for crystalline silicon solar cells |
| CN106981525A (en) * | 2017-03-03 | 2017-07-25 | 浙江爱旭太阳能科技有限公司 | P-type double-sided solar battery and preparation method thereof |
| CN114078983A (en) * | 2020-08-10 | 2022-02-22 | 苏州阿特斯阳光电力科技有限公司 | Photovoltaic module |
| CN114078983B (en) * | 2020-08-10 | 2024-04-02 | 苏州阿特斯阳光电力科技有限公司 | Photovoltaic module |
| CN114695574A (en) * | 2022-04-27 | 2022-07-01 | 浙江爱康光电科技有限公司 | Heterojunction battery piece without main grid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20170528 |