CN203932070U - A kind of silicon solar battery assembly - Google Patents
A kind of silicon solar battery assembly Download PDFInfo
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- CN203932070U CN203932070U CN201420215284.1U CN201420215284U CN203932070U CN 203932070 U CN203932070 U CN 203932070U CN 201420215284 U CN201420215284 U CN 201420215284U CN 203932070 U CN203932070 U CN 203932070U
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- glassivation
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- solar battery
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- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 46
- 239000010703 silicon Substances 0.000 title claims abstract description 46
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229920000642 polymer Polymers 0.000 claims abstract description 43
- 239000002086 nanomaterial Substances 0.000 claims abstract description 42
- 235000008216 herbs Nutrition 0.000 claims description 11
- 210000002268 wool Anatomy 0.000 claims description 11
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 8
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 3
- 238000002310 reflectometry Methods 0.000 abstract description 9
- 150000003376 silicon Chemical class 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 55
- 239000000084 colloidal system Substances 0.000 description 9
- 230000003667 anti-reflective effect Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000013078 crystal Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000006117 anti-reflective coating Substances 0.000 description 3
- 229910021419 crystalline silicon Inorganic materials 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a kind of silicon solar battery assembly, this silicon solar battery assembly arranges polymer matching layer between glassivation and cell piece.Polymer matching layer replaces the air gap layer of prior art, to form the gradient of refractive index, reduces the reflectivity of intersection.At glassivation sensitive surface, micro polymer micro-nano structure antireflection layer is set again, described micro polymer micro-nano structure antireflection layer sensitive surface arranges pyramid nanostructure.The height of pyramid nanostructure, bottom side length and array cycle are modulated; reduce light in the reflection of the light entrance face of glassivation; the transmissivity that strengthens wide-angle incident light, to improve the wide-angle light collection efficiency of silicon solar cell, has improved the delivery efficiency of light.
Description
Technical field
The utility model belongs to technical field of solar batteries, relates in particular to a kind of silicon solar battery assembly.
Background technology
Solar cell is directly converted to solar energy the electric energy of environmental friendliness, technology maturation, is the fundamental equipments of utilizing on a large scale solar energy.Yet solar cell high cost, photovoltaic conversion efficiency are too low, be the difficult point of its development of puzzlement always, the focus that Ye Shi scientific and technological circle and industrial circle are paid close attention to.The main material that current solar cell is used is crystalline silicon, and crystal silicon solar energy battery development time is long, and mature production technology accounts for the more than 80% of the whole industry solar cell market share.In conventional crystal silicon solar cell, the main method that improves conversion efficiency of solar cell is to utilize making herbs into wool technology at surface of crystalline silicon, to form the pleated structures such as pyramid or honeycombed, and sunlight is entered in crystalline silicon to improve beam Propagation length with large angle scattering.
On the other hand; for crystal silicon solar energy battery can be worked long hours in complex environment; need to by effective encapsulation, protect the core of crystal silicon solar energy battery--cell piece, the cell piece of crystal silicon solar energy battery comprises silicon active layer and electrode.Its encapsulation is mainly, at cell piece sensitive surface, glassivation is set, and shady face arranges back protective layer, and cell piece and the external world are separated by.At the sensitive surface of cell piece, the pleated structure producing by making herbs into wool technology can make silicon active layer surface irregularity, is also making herbs into wool face; Meanwhile, the interdigitated metal electrode of making on making herbs into wool face is for retainer member light transmission, and the sparse and very thin thickness that distributes, generally only has tens nanometers.It is not tight that this causes that silicon active layer contacts with glassivation; there are numerous air gaps; and not mating due to each layer of refractive index; between glassivation, air gap layer and silicon active layer, can form larger reflection, this is the key factor that the existing industry silicon solar cell efficiency of restriction improves.
In order to reduce the reflection of this part, a kind of conventional method is to apply 1/4 wavelength antireflective film to improve transmitted light energy based on glassivation upper surface.The method only has zero reflection to a certain wavelength photon in a certain angle, and overall enhanced transmission effects is limited.Another kind method is directly on glassivation surface, to make antireflective micro-nano structure; by the size of modulation antireflective micro-nano structure, can modulate glassivation surface equivalent refractive index and make it and air gap layer matches; thereby significantly reduce the reflection of interface, realize the response of wide-angle and wide spectrum.But because glassivation outer surface contacts with extraneous for a long time; outside contamination can make this antireflective micro-nano structure lose gradually its antireflecting effect; and change such glassivation and can make the maintenance cost of whole solar cell greatly improve, be not suitable for the application of industry crystal silicon solar energy battery.
Summary of the invention
The purpose of this utility model is just to provide a kind of silicon solar battery assembly, to overcome the problem that has air gap in prior art between glassivation and cell piece, reduces silicon solar cell cost, improves its photovoltaic conversion efficiency.
In order to realize above-mentioned utility model object, technical solutions of the utility model are as follows:
A silicon solar battery assembly, it comprises glassivation and cell piece, described silicon solar battery assembly also comprises the polymer matching layer being arranged between described glassivation and described cell piece.
Further, the refractive index of described polymer matching layer is greater than the refractive index of glassivation, and is less than the refractive index of cell piece.Trilaminate material has formed the refractive index gradient of transition, has greatly reduced the reflection of various material interfaces, has improved photovoltaic conversion efficiency.
Further, described polymer matching layer matches with the making herbs into wool face of cell piece near cell piece one side.Polymer matching layer in process of production, by polymethyl methacrylate being dissolved in organic solvent, can form the colloid with better mobility, be coated in the sensitive surface of cell piece, colloid penetrates in the gap between the pleated structure of silicon active layer of cell piece and has replaced air gap layer again.
Described silicon solar battery assembly also comprises the micro polymer micro-nano structure antireflection layer that is arranged at described glassivation sensitive surface.
Further, described micro polymer micro-nano structure antireflection layer sensitive surface is provided with pyramid nanostructure.Utilize pyramid nanostructure to produce the equivalent refractive index of gradual change, thus reflection when reduction light enters the blooming piece plane of incidence.
Further, described pyramid nanostructure is in array-like arrangement, and the bottom length of side of described pyramid nanostructure is 1 micron, is highly 1 micron, and the cycle is 1 micron, and lower support substrate thickness is 500 nanometers.By pyramid nanostructure height, the bottom length of side and array cycle are modulated, can between air gap layer and glassivation, form the gradient of refractive index, reduce light in the reflection of air interface.
The silicon solar battery assembly the utility model proposes is provided with polymer matching layer between cell piece and glassivation, utilizes polymer matching layer to replace the air gap layer of prior art, to form the gradient of refractive index, reduces the reflectivity of intersection.Again at glassivation outer cladding one layer of polymeric micro-nano structure antireflection layer; this micro polymer micro-nano structure antireflection layer sensitive surface arranges pyramid nanostructure; can effectively reduce light in the reflection of the sensitive surface of glassivation; strengthen the transmissivity of wide-angle incident light; to improve the wide-angle light collection efficiency of silicon solar cell, improved the delivery efficiency of light.And micro polymer micro-nano structure antireflection layer can be produced separately; when micro polymer micro-nano structure antireflection layer damages or surface is contaminated while causing anti-reflective effect to decline; can directly change this micro polymer micro-nano structure antireflection layer; and do not need whole first glassivation of changing, can greatly reduce the maintenance cost of silicon solar cell.
Accompanying drawing explanation
Fig. 1 is the structural representation of the silicon solar battery assembly of prior art;
Fig. 2 is the structural representation of silicon solar battery assembly of the present utility model.
Description of reference numerals in figure is as follows:
1, glassivation, 2, air gap layer, 3, cell piece, 4, polymer matching layer, 5, micro polymer micro-nano structure antireflection layer.
Embodiment
Below in conjunction with drawings and Examples, technical solutions of the utility model are described in further details, following examples do not form restriction of the present utility model.
The silicon solar battery assembly of prior art as shown in Figure 1, comprises glassivation 1 and cell piece 3.As the cell piece 3 of the core of silicon solar cell, it mainly comprises silicon active layer and electrode, and the present embodiment for simplicity, only shows silicon active layer.Glassivation 1 covers the sensitive surface of cell piece 3, for sealing, insulation or the waterproof etc. of cell piece 3.In order to improve the photovoltaic conversion efficiency of silicon solar cell, the silicon active layer surface of being everlasting cuts out pyramid or favose pleated structure by making herbs into wool technology.Common pleated structure is to be by several pyramid unit the pyramid array structure that array-like is arranged, each pyramid unit bottom length of side is 1 micron, be highly 1 micron, adjacent pyramid unit vertex distance (array cycle) is 1 micron.In addition, distribution of electrodes is also inhomogeneous, very thin thickness.In view of above-mentioned two reasons, the usually out-of-flatness of cell piece 3 sensitive surfaces therefore, in fact can form one deck air gap layer 2 between glassivation 1 and cell piece 3.Not not mating due to refractive index again.Between glassivation 1, air gap layer 2 and cell piece 3, can form larger reflection, reduce widely photovoltaic conversion efficiency.
Silicon solar battery assembly of the present utility model as shown in Figure 2, comprises glassivation 1, cell piece 3, polymer matching layer 4 and micro polymer micro-nano structure antireflection layer 5.The sensitive surface of cell piece 3 forms making herbs into wool face by making herbs into wool technology, and making herbs into wool face is common pyramid structure, and the pyramid unit bottom length of side is 1 micron, is highly 1 micron, and the cycle is 1 micron.
In the present embodiment, polymer matching layer 4 is filled between cell piece 3 and glassivation 1, and polymer matching layer 4 matches near cell piece 3 one side and battery 3 the making herbs into wool face of deceiving.
Polymer matching layer 4 adopts conventional polymer in industry, and as polymethyl methacrylate (PMMA), refractive index is 1.52, and its refractive index and glassivation 1 refractive index are similar and be slightly larger than the refractive index of glassivation 1.In process of production, polymethyl methacrylate is dissolved in organic solvent and can forms the colloid with better mobility, then be coated in the sensitive surface of cell piece 3, colloid is permeable to be entered in the gap between the pleated structure of silicon active layer of cell piece 3; Glassivation 1 is covered to the sensitive surface of the cell piece 3 after colloid applies, colloid can be closely in conjunction with glassivation 1 and cell piece 3 again, after colloid solidifies, forms polymer matching layer 4.Thereby glassivation 1, refractive index polymer matching layer 4 and cell piece 3 just can closely be bonded together.
The present embodiment has replaced the air gap layer 2 between glassivation 1 and cell piece 3 in prior art with polymer matching layer 4.And the refractive index of cell piece 3 is maximum, the refractive index the second of polymer matching layer 4, the refractive index of glassivation 1 is minimum; three layers have formed good refractive index gradient; reduced widely the reflectivity of material interface, compared with prior art, reflectivity can drop to original 25.9%.
Reflection when entering glassivation 1 in order further to reduce ambient light, is also provided with micro polymer micro-nano structure antireflection layer 5 at the sensitive surface of glassivation 1.
As shown in Figure 2, micro polymer micro-nano structure antireflection layer 5 is positioned at the sensitive surface of glassivation 1, as silicon solar battery assembly outermost layer.The material that micro polymer micro-nano structure antireflection layer 5 adopts is also polymethyl methacrylate (PMMA), and its refractive index is 1.52.
In process of production, polymethyl methacrylate is dissolved in organic solvent and can forms the colloid with better mobility, by nanometer embossing, in the one side of this colloid, make pyramid nanostructure, after solidifying, can form the antireflective coating with pyramid nanostructure.The sensitive surface of this antireflective coating arranges pyramid nanostructure, pyramid nanostructure is by several pyramid unit that array-like is arranged and is made of one piece with support base, each pyramid unit bottom length of side is 1 micron, is highly 1 micron, and the cycle is 1 micron; Lower support substrate thickness is 500 nanometers.Antireflective coating bottom is covered after the sensitive surface of glassivation 1; form micro polymer micro-nano structure antireflection layer 5; utilize pyramid nanostructure to produce the equivalent refractive index of gradual change; between outside air and glass, form the gradual change of equivalent refractive index; thereby reflection when having greatly reduced ambient light and enter glassivation 1, increases the ratio that light is transmitted to glassivation 1.
When broadband light (the be called broadband light of Wavelength distribution from 300 nanometers to 800 nanometers) vertical incidence glassivation 1; relatively light enters into the reflectivity of glassivation 1 from the external world, the reflectivity that is provided with the glassivation 1 of micro polymer micro-nano structure antireflection layer 5 be prior art glassivation 1 reflectivity 8.9%.Even if broadband light (Wavelength distribution is called broadband light from 300 nanometers to 800 nanometers) becomes 25 degree inclination angle incidents with blooming piece; become 75 degree angles with glassivation 1 vertical line; be provided with the reflectivity also just 65.8% of the reflectivity of prior art glassivation 1 of the glassivation 1 of micro polymer micro-nano structure antireflection layer 5, greatly improved the wide-angle collection efficiency of light.
Micro polymer micro-nano structure antireflection layer 5 can be produced separately; finished product can directly paste glassivation 1 surface and produce anti-reflective effect; when micro polymer micro-nano structure antireflection layer 5 damages or surface is contaminated while causing anti-reflective effect to decline; can directly change this micro polymer micro-nano structure antireflection layer 5; and do not need the whole glassivation 1 of changing, can greatly reduce the maintenance cost of silicon solar cell.
Above embodiment is only in order to the technical solution of the utility model to be described but not be limited; in the situation that not deviating from the utility model spirit and essence thereof; those of ordinary skill in the art are when making various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (6)
1. a silicon solar battery assembly; it comprises glassivation (1) and cell piece (3); it is characterized in that; described silicon solar battery assembly also comprises the polymer matching layer (4) being arranged between described glassivation (1) and described cell piece (3); the refractive index of described polymer matching layer (4) is greater than the refractive index of glassivation (1), and is less than the refractive index of cell piece (3).
2. silicon solar battery assembly according to claim 1, is characterized in that, described polymer matching layer (4) matches with the making herbs into wool face of cell piece (3) near cell piece (3) one side.
3. silicon solar battery assembly according to claim 1, is characterized in that, described silicon solar battery assembly also comprises the micro polymer micro-nano structure antireflection layer (5) that is arranged at described glassivation (1) sensitive surface.
4. silicon solar battery assembly according to claim 3, is characterized in that, described micro polymer micro-nano structure antireflection layer (5) is preferably polymethyl methacrylate.
5. silicon solar battery assembly according to claim 3, is characterized in that, described micro polymer micro-nano structure antireflection layer (5) sensitive surface is provided with pyramid nanostructure.
6. silicon solar battery assembly according to claim 5, is characterized in that, described pyramid nanostructure is in array-like arrangement, the bottom length of side of described pyramid nanostructure is 1 micron, be highly 1 micron, the cycle is 1 micron, and lower support substrate thickness is 500 nanometers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420215284.1U CN203932070U (en) | 2014-04-29 | 2014-04-29 | A kind of silicon solar battery assembly |
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| CN201420215284.1U CN203932070U (en) | 2014-04-29 | 2014-04-29 | A kind of silicon solar battery assembly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108428746A (en) * | 2017-02-12 | 2018-08-21 | 无锡马丁格林光伏科技有限公司 | A kind of absorbing film for thermophotovoltaic |
| CN108538951A (en) * | 2017-03-03 | 2018-09-14 | 无锡马丁格林光伏科技有限公司 | A kind of Double-side hot photovoltaic cell structure |
-
2014
- 2014-04-29 CN CN201420215284.1U patent/CN203932070U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108428746A (en) * | 2017-02-12 | 2018-08-21 | 无锡马丁格林光伏科技有限公司 | A kind of absorbing film for thermophotovoltaic |
| CN108538951A (en) * | 2017-03-03 | 2018-09-14 | 无锡马丁格林光伏科技有限公司 | A kind of Double-side hot photovoltaic cell structure |
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Effective date of registration: 20170503 Address after: 215505, Suzhou, Changshou City hi tech Industrial Development Zone, Jiangsu Province, three East Road, Huijin 1 building Patentee after: SUZHOU ZILUO INTELLIGENT TECHNOLOGY CO.,LTD. Address before: 215505 Changshou City City, Jiangsu province high tech Industrial Development Zone, No. three East Road, No. 1, Patentee before: JIANGSU DINGYUN INFORMATION SCIENCE & TECHNOLOGY CO.,LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 |
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| CF01 | Termination of patent right due to non-payment of annual fee |