CN106847961B - A kind of solar cell encapsulation structure and solar battery - Google Patents

A kind of solar cell encapsulation structure and solar battery Download PDF

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Publication number
CN106847961B
CN106847961B CN201710162616.2A CN201710162616A CN106847961B CN 106847961 B CN106847961 B CN 106847961B CN 201710162616 A CN201710162616 A CN 201710162616A CN 106847961 B CN106847961 B CN 106847961B
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electrode
convex lens
solar cell
photoelectric conversion
cell encapsulation
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CN106847961A (en
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韩少茹
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Zhongke Manufacturing Shenzhen Group Co ltd
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Anhui Zhengxi Biaowang New Energy Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/048Encapsulation of modules
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/52PV systems with concentrators

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Photovoltaic Devices (AREA)

Abstract

Solar cell encapsulation structure and solar battery, comprising: light incident layer, the incidence for sunlight;Photoelectric conversion material, with generation carrier;Sealing material is set between light incident layer and photoelectric conversion material;Top electrode is set to photoelectric conversion material upper surface;Lower electrode, is set to photoelectric conversion material lower surface;Top electrode includes multi-group electrode, and the distance between each group electrode is the first interval;Multiple convex lens concentration structures corresponding with multi-group electrode are set inside sealing material, and convex lens concentration structure is set to the surface of group electrode, the equal length of longest edge and group electrode;The height of convex lens concentration structure distance group electrode is set, is generally aligned in the same plane its focus with group electrode;Second interval of the setting width much smaller than the first interval among group electrode.

Description

A kind of solar cell encapsulation structure and solar battery
Technical field
The present invention relates to a kind of encapsulating structures, more particularly, to a kind of encapsulating structure of solar battery.
Background technique
As the mankind continually develop new energy, solar energy is gradually applied in multiple fields by the mankind, solar power generation A kind of new energy, have the characteristics that environmental protection, energy conservation, it is inexhaustible, solar cell module be solar energy hair Highest part is worth in core and solar power system in electric system, effect is to convert solar energy into Electric energy, and solar cell module packaging technology quality directly affects the service life of solar battery.
As the dependence of the natural energy resources resource such as petroleum, natural gas is increasingly aggravated in the scientific and technological progress whole world of the mankind, and The problems such as continuous growth of global energy requirements, the energy, natural environment and climate warm, becomes increasingly conspicuous.It develops and increases and is reproducible green The use of the color energy has been very urgent.The green energy resources such as photovoltaic, biological energy source and wind energy or becoming tradition The best substitute technology of the energy.
Solar-photovoltaic technology is the photovoltaic effect principle based on semiconductor, using solar battery by solar energy It is converted into electric energy.Its most crucial device is solar battery.When solar irradiation is mapped on solar battery, battery is inhaled Photon energy is received, electron-hole pair is generated.Under the effect of battery built in field, light induced electron and hole are separated, battery two There is the accumulation of heterocharge in end, i.e. generation " photovoltage ", built in field two sides extraction electrode and connect load, then bear Load just has " photoproduction " electric current to pass through, to obtain power output.
The commercial conversion efficiency for improving solar battery, is solar energy industry pursuit constant always.Solar battery Performance is to be determined by the photoelectric characteristic of the battery, and the loss of battery performance is mainly derived from optical loss and electricity damage It loses.Solar battery optical loss mainly includes that battery front surface reflection loss and electrode stop caused contact grid line Shadow loss.Wherein, it can get rather low light by flannelette and antireflective coating technology to reflect, reduce the reflection of battery front surface Loss.
Optical loss caused by stopping for the electrode of solar battery, the prior art, which mainly passes through, will be incident on electrode Light refraction scatters to the region other than electrode, to increase effective light.But the light that part reflects or scatters is still It may be irradiated on electrode.
Summary of the invention
The present invention provides a kind of improved solar cell encapsulation structure and solar batteries, can be further reduced Light is incident on electrode.
As one aspect of the present invention, a kind of solar cell encapsulation structure is provided, comprising: light incident layer is used for The incidence of sunlight;Photoelectric conversion material, the irradiation for being used to receive sunlight generate carrier;Sealing material is set to Between light incident layer and photoelectric conversion material;Top electrode is set to photoelectric conversion material upper surface;Lower electrode, is set to Photoelectric conversion material lower surface;The top electrode includes multi-group electrode, and the distance between each group electrode is the first interval;It is described close Multiple convex lens concentration structures corresponding with the multi-group electrode are set inside closure material, and the convex lens concentration structure is set to a group electricity The surface of pole, vertical section longest edge are equal with the group width of electrode;The convex lens concentration structure distance group electrode is set Highly, it is generally aligned in the same plane its focus with group electrode;Setting width is much smaller than the second of the first interval among described group of electrode Interval.
Preferably, the sealing material be ethane-acetic acid ethyenyl resin copolymer (EVA), polyvinyl butyral (PVB), Polycarbonate (PC), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), low density polyethylene (LDPE) (LDPE), polypropylene (PP), one of polystyrene (PS), TPU, silicone, ionomer, light-cured resin or several.
Preferably, the material of the convex lens concentration structure is ethane-acetic acid ethyenyl resin copolymer (EVA), polyvinyl alcohol contracts Butyraldehyde (PVB), polycarbonate (PC), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), low density polyethylene (LDPE) (LDPE), one of polypropylene (PP), polystyrene (PS), TPU, silicone, ionomer, light-cured resin or It is several.
Preferably, the refractive index of the convex lens concentration structure material is greater than the refractive index of sealing material.
It preferably, further include the reflection layer for being set to bottom.
Preferably, the material of top electrode and lower electrode is TCO material or conductive metallic material.
Preferably, surface texture is arranged in the inner surface of the light incident surface layer.
Preferably, second interval midpoint is located on the extended line of convex lens primary optical axis, makes the convex lens concentration structure Converged light be irradiated to it is described second interval in.
Preferably, including being set to convex lens concentration structure and organizing the diffusing structure between electrode, the diffusing structure has Centre setting third interval, the third interval width are set as the focusing surface and diffusing structure cross of the convex lens concentration structure The width of section lap.
Preferably, the light incident layer is glass.
Preferably, the photoelectric conversion material is crystalline silicon.
As another aspect of the present invention, a kind of solar battery is provided comprising one of above-mentioned solar-electricity Pond encapsulating structure.
Detailed description of the invention
Fig. 1 is the solar cell encapsulation structure schematic diagram of the embodiment of the present invention.
Fig. 2 is the partial schematic diagram of the preferred embodiment of the present invention.
Specific embodiment
In order to illustrate more clearly of technical solution of the present invention, embodiment will be used simply to be situated between the present invention below Continue, it should be apparent that, be described below in be only one embodiment of the present of invention, for those of ordinary skill in the art come It says, without any creative labor, other technical solutions can also be obtained according to these embodiments, also belonged to Disclosure of the invention range.
The solar cell encapsulation structure of the embodiment of the present invention, as shown in Figure 1, from bottom to up successively include backboard 100, it is close Closure material 200, lower electrode 300, photoelectric conversion material 400, top electrode 500, sealing material 600, light incident layer 700.
Backboard 100 is located at the surface of the non-light side of solar battery, for providing structural support to solar battery.Light Incident layer 700 is set to the sensitive side of solar battery, the incidence for sunlight.Existing Normal back plate can be used with before Plate material, such as can be the materials such as glass, plastics, metal.In a preferred embodiment, solar battery is used glass as The backboard 100 of plate and the material of light incident layer 700.
Sealing material provides structural support and positioning for solar battery route equipment, at the same isolated environment and it is extraneous because Influence of the element for photoelectric conversion material and route.The position of sealing material is in the centre of solar cell module, with light Incident layer 700 and the mutual gluing of backboard 100, wrap photoelectric conversion material 400 comprising are located under photoelectricity dress conversion materials 400 The sealing material 600 of 400 top of sealing material 200 and photoelectric conversion material of side.Ethylene-acetate can be used in sealing material Ethylene resin copolymer (EVA), polycarbonate (PC), polymethyl methacrylate (PMMA), gathers polyvinyl butyral (PVB) Vinyl chloride (PVC), low density polyethylene (LDPE) (LDPE), polypropylene (PP), polystyrene (PS), TPU, silicone, ionomeric One of object, light-cured resin are several.
Photoelectric conversion material 400 is the semiconductor devices for luminous energy being directly translated into using photoelectric conversion effect electric energy, too Sun generates electronics-hole pair after capable of being irradiated to photoelectric conversion material 400, after electronics-hole in space-charge region to generating, It is built electric field separates immediately, light induced electron is pushed into the area n, and photohole is pushed into the area P.So being produced in p-n junction two sides The accumulation of positive and negative charge forms the photoproduction electric field opposite with built in field, in the case where PN junction is opened a way, photogenerated current and just When equal to electric current, stable potential difference is set up at PN junction both ends, becomes open-circuit voltage, so that PN junction be made to play the work of power supply With.Existing crystal silicon material can be used as photoelectric conversion material 400, such as monocrystalline silicon, polysilicon, thin film silicon and amorphous silicon Deng.
The electrode of solar battery includes lower electrode 300 and top electrode 500, wherein lower electrode 300 is set to photoelectricity and turns 400 lower surface of conversion materials, top electrode 500 are set to 400 upper surface of photoelectric conversion material, collect and come from photoelectric conversion material 400 Photogenerated carrier.Top electrode 500 and lower electrode 300 can be the single layer structure comprising conductive material, or Multilayered structure.
Electrode material can be conductive metallic material by comprising silver or aluminium, copper, nickel, tin, gold etc. or their alloy etc. Conductive material is made, and is also possible to such as TCO material.Other than the layer comprising these conductive materials, can also have Layer comprising transparent conductive oxide, such as zinc oxide, tin oxide etc..
Top electrode 500 includes multi-group electrode 501, and the distance between each group electrode is set as first between every group of electrode 501 Interval 502.Multiple convex lens concentration structures 601 corresponding with multi-group electrode 501, convex lens optically focused knot are set inside sealing material 600 Structure 601 is set to the surface of group electrode 501, and vertical section is convex lens structures, the width of vertical section longest edge and group electrode 501 It spends equal.The material of convex lens concentration structure 601 can be ethane-acetic acid ethyenyl resin copolymer (EVA), polyvinyl butyral (PVB), polycarbonate (PC), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), low density polyethylene (LDPE) (LDPE), poly- One of propylene (PP), polystyrene (PS), TPU, silicone, ionomer, light-cured resin are several.Selection When the material of convex lens concentration structure 601, its refractive index is made to be greater than the material of sealing material 600, is focused so as to be formed, such as When using EVA or PVB as sealing material 600, material of the PVC as convex lens concentration structure 601 can be used.
Convex lens concentration structure 601 is arranged much smaller than second interval 503 at the first interval in setting width among group electrode 501 The height of distance group electrode 501, is generally aligned in the same plane the focus of its convex lens concentration structure 601 with group electrode 501, the second interval 503 midpoint is located on the extended line of 601 primary optical axis of convex lens concentration structure, is irradiated to the converged light of convex lens concentration structure 601 In second interval 503, to be emitted onto the light focusing of group electrode 501, when avoiding reflecting or scattering, light is irradiated to group Optical loss caused by electrode 501.
It, can be to be scattered as shown in Fig. 2, being arranged between convex lens concentration structure 601 and group electrode 501 in preferred embodiment Structure 602, third interval 603 is arranged among diffusing structure 602, and the width at third interval 603 is set as convex lens concentration structure 601 Focusing surface and the 603 cross section lap of diffusing structure width, so as to further by the light except focusing surface It scatters in photoelectric conversion material.
In conclusion the present invention is led to by the way that focusing structure is arranged in encapsulating material by the light by being irradiated to electrode Over-focusing structure focuses in the interval region in electrode, avoids loss caused by light irradiation electrode.
Particular features, structures, materials, or characteristics described in the present invention in any one or more embodiments or can be shown It can be combined in any suitable manner in example.In addition, without conflicting with each other, those skilled in the art can be by this specification Described in the features of different embodiments or examples and different embodiments or examples be combined.It is all of the invention Any modification, equivalent replacement, improvement and so within spirit and principle, are included within the scope of protection of the present invention.

Claims (9)

1. a kind of solar cell encapsulation structure, comprising: light incident layer, the incidence for sunlight;Photoelectric conversion material is used Carrier is generated in the irradiation for receiving sunlight;Sealing material is set between light incident layer and photoelectric conversion material;It powers on Pole is set to photoelectric conversion material upper surface;Lower electrode, is set to photoelectric conversion material lower surface;It is characterized by: institute Stating top electrode includes multi-group electrode, and the distance between each group electrode is the first interval;Inside the sealing material setting with it is described The corresponding multiple convex lens concentration structures of multi-group electrode, the convex lens concentration structure are set to the surface of group electrode, vertical section Longest edge is equal with the group width of electrode;The material for selecting convex lens concentration structure makes its refractive index be greater than the material of sealing material, Setting is focused so as to be formed;The height of the convex lens concentration structure distance group electrode is set, its focus and group electrode position are made In same plane;Second interval of the setting width less than the first interval among described group of electrode;Second interval midpoint is located at On the extended line of convex lens concentration structure primary optical axis, it is irradiated to the converged light of the convex lens concentration structure in second interval, To be emitted onto the light focusing of group electrode, when avoiding reflecting or scattering, light is irradiated to the damage of optics caused by group electrode It loses.
2. solar cell encapsulation structure according to claim 1, it is characterised in that: the sealing material is ethylene-second Sour ethylene resin copolymer (EVA), polyvinyl butyral (PVB), polycarbonate (PC), polymethyl methacrylate (PMMA), Polyvinyl chloride (PVC), low density polyethylene (LDPE) (LDPE), polypropylene (PP), polystyrene (PS), TPU, silicone, ionomer are poly- Close one of object, light-cured resin or several.
3. solar cell encapsulation structure according to claim 2, it is characterised in that: the material of the convex lens concentration structure For ethane-acetic acid ethyenyl resin copolymer (EVA), polyvinyl butyral (PVB), polycarbonate (PC), poly-methyl methacrylate Ester (PMMA), polyvinyl chloride (PVC), low density polyethylene (LDPE) (LDPE), polypropylene (PP), polystyrene (PS), TPU, silicone, from One of sub- cross-linked polymer, light-cured resin are several.
4. solar cell encapsulation structure according to claim 3, it is characterised in that: further include be set to bottom light it is anti- Penetrate layer.
5. solar cell encapsulation structure according to claim 4, it is characterised in that: the material of top electrode and lower electrode It is TCO material or conductive metallic material.
6. solar cell encapsulation structure according to claim 5, it is characterised in that: the inner surface of the light incident layer is set Set surface texture.
7. solar cell encapsulation structure according to claim 6, it is characterised in that: the light incident layer is glass.
8. solar cell encapsulation structure according to claim 7, it is characterised in that: the photoelectric conversion material is crystal Silicon.
9. a kind of solar battery comprising solar cell encapsulation structure described in one of claim 1-8.
CN201710162616.2A 2017-03-18 2017-03-18 A kind of solar cell encapsulation structure and solar battery Active CN106847961B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203013770U (en) * 2012-07-05 2013-06-19 夏普 Photovoltaic module with enlarged light-receiving area
CN103165711A (en) * 2011-12-14 2013-06-19 财团法人工业技术研究院 Packaging structure and solar cell with same
JP5326731B2 (en) * 2009-03-26 2013-10-30 大日本印刷株式会社 Organic thin film solar cell

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0227718D0 (en) * 2002-11-28 2003-01-08 Eastman Kodak Co A photovoltaic device and a manufacturing method hereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5326731B2 (en) * 2009-03-26 2013-10-30 大日本印刷株式会社 Organic thin film solar cell
CN103165711A (en) * 2011-12-14 2013-06-19 财团法人工业技术研究院 Packaging structure and solar cell with same
CN203013770U (en) * 2012-07-05 2013-06-19 夏普 Photovoltaic module with enlarged light-receiving area

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Effective date of registration: 20190716

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Address after: 1510 Beike Building, No. 59 Gaoxin South 9th Road, Gaoxin Community, Gaoxin District, Yuehai Street, Nanshan District, Shenzhen City, Guangdong Province, 518000

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