CN107994082A - A kind of light is redirected film and photovoltaic cell component - Google Patents
A kind of light is redirected film and photovoltaic cell component Download PDFInfo
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- CN107994082A CN107994082A CN201711414544.2A CN201711414544A CN107994082A CN 107994082 A CN107994082 A CN 107994082A CN 201711414544 A CN201711414544 A CN 201711414544A CN 107994082 A CN107994082 A CN 107994082A
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- 230000003287 optical effect Effects 0.000 claims abstract description 57
- 210000004027 cell Anatomy 0.000 claims abstract description 36
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor 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
- H01L31/02—Details
- H01L31/0216—Coatings
- H01L31/02161—Coatings for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/02167—Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/02168—Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells the coatings being antireflective or having enhancing optical properties for the solar cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor 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
- H01L31/04—Semiconductor 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
- H01L31/042—PV modules or arrays of single PV cells
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The present invention provides a kind of light and is redirected film and processing method and photovoltaic cell component, the present invention provides a kind of light and is redirected film, the present invention organically combines optical coupling grating, transparent body and light reflection structure, a kind of film that there is light and be redirected is made, the film is covered in the electrode surface of photovoltaic cell component, and the gap position between cell piece, the light for being emitted onto these positions changes direction again, packaged glass through photovoltaic cell component reflexes to cell piece working region again, improves the utilization rate of light.Scheme manufacture craft provided by the invention is simple, it is easy to accomplish large-scale production.
Description
Technical field
The present invention relates to a kind of light to be redirected film, and a kind of particularly light applied to photovoltaic module is redirected film and photovoltaic electric
Pond component.
Background technology
Photovoltaic welding belt is applied to the connection between photovoltaic module cell piece, plays the conductive important function for gathering electricity.In order to protect
The welding of card welding and cell piece is firm and prevents welding from corroding, and welding surface is coated with tin layers, when sun light direct beam to welding
During surface, smooth tin layers can directly reflect away sunlight, this part sunlight cannot be utilized by solar panel, be caused
The waste of luminous energy.
There is part welding body to be equipped with striated structure to be used for changing radiation direction again, but welding base material is copper material,
In processing, striated structure is difficult to microstructure, and reflecting effect is unsatisfactory, and surface tin thickness can be caused uneven
It is even, cell piece fragment is easily caused, influences production efficiency.
Occur the micro-structures such as microprism in the prior art to reflect sunlight, improve the light conversion effect of photovoltaic cell component
Rate, its structure generally have partially flat body, on body be equipped be used for again change radiation direction a plurality of prism structure or
Aluminium film or aluminized coating of the surface coating of triangular pyramid, these prisms or triangular pyramid for reflection light, the coated with aluminum in micro-structure
Film or coating process are more complicated, and production efficiency needs to improve.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the object of the present invention is to provide it is a kind of it is simple in structure, cost is low, energy
The light that light is made full use of is redirected film and the photovoltaic cell component of film is redirected using the light.
To reach above-mentioned purpose, the technical solution adopted by the present invention to solve the technical problems is：
Light is redirected film, includes from top to bottom：
Optical coupling grating, the optical coupling grating are infiltration type grating；
Body, the body are transparent material；
Light reflection structure；
The light that light is redirected on film is irradiated to travel on light reflection structure after optical coupling grating enters body and quilt
Reflection, reflection light blaze abroad through optical coupling grating again；
Or, including：
Body, the body are transparent material,
Light reflection grating, the light reflection grating are machined in body bottom surface, or are machined in a reflecting layer and body contacts
Surface, the reflecting layer are compounded in body lower surface,
It is irradiated to after the light that light is redirected on film enters body and travels on light reflection grating and reflected, reflection light
Blaze abroad again through body.
The present invention organically combines optical coupling grating, transparent body and light reflection structure, and being made a kind of, there is light to lead again
To the film of function, which is covered in the electrode surface of photovoltaic cell component, and the gap position between cell piece, will
The light for being irradiated to these positions changes direction again, and the packaged glass through photovoltaic cell component reflexes to cell piece workspace again
Domain, improves the utilization rate of light.Scheme manufacture craft provided by the invention is simple, it is easy to accomplish large-scale production.
Further, the light reflection structure is the metal coating for having light reflection effect coated on body lower surface, or
Light reflection type grating is machined with the body lower surface；
Or, the body lower surface is compounded with reflecting layer, the reflecting layer has a metal coating of light reflection effect, or
The reflection layer surface is machined with light reflection type grating.
Further, the optical coupling grating is directly machined in body upper surface；Or, it is compounded with above body transparent
Light coupling layer, the optical coupling grating are directly machined in the upper surface or lower surface of light coupling layer.
Further, the reflecting layer is equipped with groove structure；The body is covered on groove or is embedded at the ditch
In groove, the width of the groove is more than the grating constant of 2 times of optical coupling gratings.
Further, the groove depth of the optical coupling grating is in cyclically-varying.
Further, the height of projection between the optical coupling grating slot is in cyclically-varying.
Further, the light coupling layer surface is in periodic arc structure.
Further, the light is redirected film along the direction vertical with its length direction, the optical coupling grating of diverse location
Cycle and orientation it is different, and determined by following factor：The light of vertical incidence is redirected the extrorse light in film length side through light
Coupling grating is coupled into light coupling layer, and light is redirected direction in the middle part of film to light and propagates.
Further, the optical coupling grating is nanometer diffraction grating.
Further, the cycle of the nanometer diffraction grating, the angle of orientation meet following relation：
(1)tanφ1=sin φ/(cos φ-nsin θ (Λ/λ))
(2)sin2(θ1)=(λ/Λ)2+(n sinθ)2-2n sinθcosφ(λ/Λ)
Wherein, light incides X/Y plane, 1 Hes of θ at an angleThe angle of diffraction and diffraction of diffraction light are represented successively
The azimuth of light, θ and enter successively represent light source incidence angle and wavelength, ∧ andSuccessively represent nanometer diffraction grating cycle and
The angle of orientation, n represent the spreading rate of light wave in media as well, wherein, the angle of diffraction is diffracted ray and z-axis positive direction angle；Azimuth
For diffracted ray and positive direction of the x-axis angle；Incidence angle is incident ray and z-axis positive direction angle；The angle of orientation is groove profile direction and y
Axis positive direction angle.
Further, the upper end of the projection portion between the nanometer diffraction grating groove is prismatic structure.
The present invention also provides a kind of photovoltaic cell component, the photovoltaic module includes multiple cell pieces, connects cell piece
Welding and light described above are redirected film, and the gap area between the welding upper surface and/or the cell piece is provided with
The light is redirected film.
The photovoltaic module includes multiple cell pieces, the welding for connecting cell piece and has light to be redirected film, and the light is led again
The gap area between the welding upper surface or the cell piece is arranged on to film, the light is redirected film and can also set at the same time
Gap area between the welding upper surface and the cell piece, the light are redirected the length direction of film and the welding
Length direction, the gap area length direction are arranged in parallel.
Using the above preferred scheme, light is redirected film and is arranged on the space bit that illumination is not utilized in former photovoltaic module
Put, be electric energy by the surface conversion that illumination reflexes to cell piece, improve the generated output of photovoltaic module.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1-7 is the structure diagram of different embodiments of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
In order to reach the purpose of the present invention, as shown in Figure 1, light is redirected film：
Optical coupling grating 21, the optical coupling grating 21 are infiltration type grating；
Body 1, the body are transparent material；
Light reflection structure 11；
The light that light is redirected on film is irradiated to travel on light reflection structure 11 after optical coupling grating 21 enters body 1
And reflected, reflection light blazes abroad through optical coupling grating 21 again.
The present invention organically combines optical coupling grating, transparent body and light reflection structure, and being made a kind of, there is light to lead again
To the film of function, which is covered in the electrode surface of photovoltaic cell component, and the gap position between cell piece, will
The light for being irradiated to these positions changes direction again, and the packaged glass through photovoltaic cell component reflexes to cell piece workspace again
Domain, improves the utilization rate of light.Scheme manufacture craft provided by the invention is simple, it is easy to accomplish large-scale production.
In certain embodiments, the light reflection structure 11 is the gold for having light reflection effect coated on 1 lower surface of body
Belong to coating, or light reflection type grating is machined with 1 lower surface of body；
Or, the body lower surface is compounded with reflecting layer, the reflecting layer has a metal coating of light reflection effect, or
The reflection layer surface is machined with light reflection type grating.
In certain embodiments, the optical coupling grating is directly machined in body upper surface；Or, it is compounded with above body
Transparent light coupling layer, the optical coupling grating are directly machined in the upper surface or lower surface of light coupling layer.
In certain embodiments, the reflecting layer is equipped with groove structure；The body is covered on groove or is embedded at
In the groove, the width of the groove is more than the grating constant of 2 times of optical coupling gratings.
For example, as shown in Fig. 2, body 1 is prepared for transparent type material, its upper surface directly processes the optical coupling of light infiltration type
Grating 21, its lower surface directly coat reflective material (such as silver or aluminium coating), or again compound one layer of reflection layer 3 (such as
Aluminium film).
As shown in figure 3, in certain embodiments, the reflecting layer 3 is equipped with groove structure 31；Prepared by upper surface have light
The transparent bodies 1 of infiltration type optical coupling grating 21 are covered on groove structure 31 or are embedded in the groove structure 31, described
The width of groove structure 31 is more than the grating constant of 2 times of optical coupling gratings 21.These groove structures 31 both can be as institute in Fig. 3
The rectangle bathtub construction or V-shaped groove structure shown, or such as micro-prism structure of the prior art, by these structures, match somebody with somebody
Closing light coupling grating 21, can further adjust light shooting angle, finally all be reflected with the emergent light for meeting as all as possible
To cell piece working region.
In the example of fig. 4, then it is that light reflection type grating 12 is directly processed in the lower surface of transparent type body 1.It is in this way, straight
1 upper and lower surface of body for being connected on transparent type processes the optical coupling grating 21 and reflection-type grating 12 of light infiltration type respectively, it is possible to
The light of body 1 will be led into by optical coupling grating 21, propagated after the reflection of reflecting grating 12, then through optical coupling grating 21
Go out, after above-mentioned propagation, the incidence angle and the angle of emergence of light can have greatly changed, as needed, the light of vertical incidence
The angle of emergence of line is greater than or less than 90 °, and the angle of emergence of 0 ° -180 ° other angle incident rays should also be avoided to hang down as far as possible
Nogata is to outgoing.And incidence angle should be channeled to cell piece work as far as possible closer to the angle of emergence of 90 ° of incident ray
Region is gone.This can be obtained by the parameter of well-designed grating.Even if the angle of emergence of some light is 90 °, when it is through envelope
Glaze secondary reflection again, after being redirected film with vertical direction incident light, can be also directed to cell piece working region again.This
Sample, within the sunlit time on whole daytime, is irradiated to the light that light is redirected on film, can nearly all be directed into cell piece
Working region.Therefore, technical scheme is influenced to substantially reduce by solar angle degree.This structure is most simple,
Special Embosser can be used to carry out simultaneous manufacturing, efficiency is very high, if it is desired, is answered again in the upper surface of transparent bodies
Unify the smooth transparent membrane of layer, lower surface as needed can also compound thin film, can coat on this thin film anti-
Penetrate material, such as aluminized coating.
More particularly to when, it is necessary to be influenced caused by refraction when considering that light enters different medium and interface reflection.
In certain embodiments, the groove depth of the optical coupling grating 21 is in cyclically-varying.Film is redirected by varying light
Groove depth of the edge to the optical coupling grating 21 of central area, in that context it may be convenient to adjust the final reflection light in each region and reach cell piece
The diverse location of working region, by the design of certain optical coupling grating, can make light be redirected the uniform light of film reflection
Ground is irradiated to all or part of working region of solar battery sheet.Add the flexibility of design.For example, it is redirected with light
On vertical transverse axis (width) direction of the film longitudinal axis (length direction), the groove depth of optical coupling grating 21 is redirected the two sides of film by light
Edge gradually deepens or shoals to central area, and the trend deepened or shoaled can be constrained according to linear or a certain curvilinear function.
Alternatively, it is in cyclically-varying that can also use the height of projection between 21 groove of optical coupling grating, to reach
Identical purpose, or meet other application demand.It is for example, (wide being redirected the vertical transverse axis of the film longitudinal axis (length direction) with light
Degree) on direction, between 21 groove of optical coupling grating it is raised from light be redirected the two sides of film along to central area it is progressively longer or
Shorten, the elongated or trend that shortens can according to linear or a certain curvilinear function come constrain (such as SIN function, in practical application,
The sinusoidal cycle is more than 4 times of amplitudes and is advisable, and can also be determined according to actual conditions).
Alternatively, it is redirected with light on vertical transverse axis (width) direction of the film longitudinal axis (length direction), optical coupling grating 21
Groove depth or groove between height of projection be in multiple periods of change.
It is redirected in light on the film longitudinal axis (length direction) direction, the height of projection between the groove depth or groove of optical coupling grating 21
It can also be in cyclically-varying.
In some embodiments, the groove of the most deep coupling grating 21 of depth is arranged according to certain rule, for example, these grooves
The uniform parallel segment of line interlamellar spacing between the midpoint of bottom, and these lines and light are redirected between the axis in film length direction
In any numerical value in addition to 90 deg between an angle, such as 15 °, 30 °, 45 ° or 60 ° etc. 0-180 °.
Similarly, in certain embodiments, in some embodiments, it is convex between the groove of highly minimum coupling grating 21
Rise and arrange according to certain rule, for example, the uniform parallel segment of line interlamellar spacing between these raised midpoints, and these connect
Line and light are in appoint between an angle, such as 15 °, 30 °, 45 ° or 60 ° etc. 0-180 ° between being redirected the axis in film length direction
One numerical value in addition to 90 deg.
In this way, provide another controllable parameter for the angle being redirected of light, beneficial to optimizing.
In the example of hgure 5, in the light coupling layer 2 of 1 upper surface composite transparent of transparent bodies, in the following table of light coupling layer 2
Face processes the optical coupling grating 21 (can also be machined in upper surface) of infiltration type, and light reflection is processed in the lower surface of transparent bodies 1
Type grating 12, is then redirected film by the two compound composition light.Infiltration type can certainly be processed in the upper surface of light coupling layer 2
Optical coupling grating 21, then will the two be compound in the lower surface of transparent bodies 1 or upper surface processing light reflection type grating 12
Form light and be redirected film.
As shown in fig. 6, in certain embodiments, the light coupling layer 2 prepares light with the one side that transparent bodies 1 contact and passes through
Type optical coupling grating 21, its upper surface are in periodic arc structure.The lower surface of transparent bodies 1 is machined with light reflection type grating
12 (or optical reflection coating or reflection layers), to meet the needs of more light angles of emergence adjust.
In the example in figure 7, it (can be that light reflection type grating, light are anti-that light reflection structure 11 is set in the upper surface of body 1
Penetrate coating or reflection layer), the then light coupling layer 2 of composite transparent again above light reflection structure 11, light coupling layer 2
Upper surface processing infiltration type optical coupling grating 21, at this time, body 1 can not select transparent material.It is substantially by optical coupling
Layer 2 is equivalent to transparent bodies 1 in previous embodiment, and the body 1 in the present embodiment, is equivalent in some previous embodiments
Therefore, substantially its principle is just as existing reflection layer 3..
The incidence angle of light specifically described herein refers to that incident ray is redirected film upper surface glazing incidence point place water with light
Angle between plane, the angle of emergence refer to that the light for being redirected the injection of film upper surface in film through light is redirected from light to be redirected with light
Angle between horizontal plane where the glazing eye point of film upper surface.
In certain embodiments, the light is redirected film along the direction vertical with its length direction, the optocoupler of diverse location
The cycle of closing light grid and orientation are different, and are determined by following factor：The light of vertical incidence is redirected film length direction side through light
The optical coupling grating of edge is coupled into light coupling layer, and light is redirected direction in the middle part of film to light and propagates.By above-mentioned constrained designs,
It may insure that incident ray is all propagated to effective coverage.
In practical applications, the structure of following simplification can also be used, is only included：
Body, the body are transparent material,
Light reflection grating, the light reflection grating are machined in body bottom surface, or are machined in a reflecting layer and body contacts
Surface, the reflecting layer are compounded in body lower surface,
It is irradiated to after the light that light is redirected on film enters body and travels on light reflection grating and reflected, reflection light
Blaze abroad again through body.Only need to set reflecting grating in transparent bodies bottom surface, so that it may that realizes light is redirected work, these
Light reflection grating can also be designed specially, the relevant parameter of grating be designed by Regional Laws, periodicity, by incident body
Light reflex on packaged glass, the working region for being re-reflected into cell piece is gone.
In practical application, body can be two layers or more than two layers of multilayer, and every layer of upper surface can set light saturating
Cross the optical coupling grating of type, the parameter of every layer of optical coupling grating can be identical or different, and then can to light propagation path into
The more convenient adjustment of row, only sets light reflection structure, such as light reflection grating or light reflection in the lower surface of bottom one layer of body
Metal coating.
Reflecting prism of the prior art is, it is necessary to process microprism and multiple in its surface metallization reflective material, technique
It is miscellaneous and very high to the smoothness requirements of metal coating, can be with the present invention provides the feasible program for exempting metal coating, or also
Metal coating combines (metal coating can be plane, reduce production difficulty).Meanwhile can by individual layer grating or two layers or
The Parameters variation of multi-layer grating and its grating comes the path of each region light reflection of accuracy controlling, makes light reflection according to controllable precise.
In order to further improve the utilization ratio of light, the optical coupling grating uses the nanometer diffraction grating of light infiltration type.
Further, the cycle of the nanometer diffraction grating, the angle of orientation meet following relation：
(1)tanφ1=sin φ/(cos φ-n sin θs (Λ/λ))
(2)sin2(θ1)=(λ/Λ)2+(n sinθ)2-2n sinθcosφ(λ/Λ)
Wherein, light incides X/Y plane, 1 Hes of θ at an angleThe angle of diffraction and diffraction of diffraction light are represented successively
The azimuth of light, θ and λ represent the incidence angle and wavelength of light source successively, ∧ andSuccessively represent nanometer diffraction grating cycle and
The angle of orientation, n represent the spreading rate of light wave in media as well, wherein, the angle of diffraction is diffracted ray and z-axis positive direction angle；Azimuth
For diffracted ray and positive direction of the x-axis angle；Incidence angle is incident ray and z-axis positive direction angle；The angle of orientation is groove profile direction and y
Axis positive direction angle.
In certain embodiments, the upper end of the projection portion between the nanometer diffraction grating groove could be provided as prismatic
Structure.
The present invention also provides a kind of photovoltaic cell component, the photovoltaic module includes multiple cell pieces, connects cell piece
Welding and light described above are redirected film, and the gap area between the welding upper surface and/or the cell piece sets institute
State light and be redirected film.
The photovoltaic module includes multiple cell pieces, the welding for connecting cell piece and has light to be redirected film, and the light is led again
The gap area between the welding upper surface or the cell piece is arranged on to film, the light is redirected film and can also set at the same time
Gap area between the welding upper surface and the cell piece, the light are redirected the length direction of film and the welding
Length direction, the gap area length direction are arranged in parallel.In this way, area between welding region and/or cell piece will be radiated at
The light in domain re-directs cell piece working region.
Using the above preferred scheme, light is redirected film and is arranged on the space bit that illumination is not utilized in former photovoltaic module
Put, be electric energy by the surface conversion that illumination reflexes to cell piece, improve the generated output of photovoltaic module.
The present invention produces the advantage that：
1st, grating can be processed by way of die marks or transfer, and mould can utilize photoetching process to prepare, and be beneficial to
Processing and large-scale production, processing cost are low.
2nd, it is easy to adjust for different dimensions area, reflecting face α.
3rd, for the whole sunshine-duration, for the incidence angles degree of sunlight, reflectivity is improved, adds solar energy
The generated output of photovoltaic cell components.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow ordinary skill people
Member can understand present disclosure and be carried out, it is not intended to limit the scope of the present invention, it is all according to the present invention
The equivalent change or modification that Spirit Essence is made, should all cover within the scope of the present invention.
Claims (12)
1. a kind of light is redirected film, it is characterised in that includes from top to bottom：
Optical coupling grating, the optical coupling grating are infiltration type grating,
Body, the body are transparent material,
Light reflection structure,
The light that light is redirected on film is irradiated to travel on light reflection structure and reflected after optical coupling grating enters body,
Reflection light blazes abroad through optical coupling grating again；
Or, including：
Body, the body are transparent material,
Light reflection grating, the light reflection grating is machined in body bottom surface, or is machined in a reflecting layer and the surface of body contacts,
The reflecting layer is compounded in body lower surface,
It is irradiated to after the light that light is redirected on film enters body and travels on light reflection grating and reflected, reflection light passes through again
Body blazes abroad.
2. light according to claim 1 is redirected film, it is characterised in that
The light reflection structure is the metal coating for having light reflection effect coated on body lower surface, or in the body following table
Face is machined with light reflection type grating；
Or, the body lower surface is compounded with reflecting layer, the reflecting layer has the metal coating of light reflection effect, or described
Reflection layer surface is machined with light reflection type grating.
3. light according to claim 1 or 2 is redirected film, it is characterised in that the optical coupling grating is directly machined in this
Body upper surface；Or, transparent light coupling layer is compounded with above body, the optical coupling grating is directly machined in light coupling layer
Upper surface or lower surface.
4. light according to claim 2 is redirected film, it is characterised in that the reflecting layer is equipped with groove structure；It is described
Body is covered on groove or is embedded in the groove, and the width of the groove is more than the grating constant of 2 times of optical coupling gratings.
5. light according to claim 3 is redirected film, it is characterised in that the groove depth of the optical coupling grating is in periodically change
Change.
6. light according to claim 3 is redirected film, it is characterised in that the height of projection between the optical coupling grating slot
In cyclically-varying.
7. light according to claim 6 is redirected film, it is characterised in that the light coupling layer surface is in periodic circular arc
Structure.
8. light according to claim 3 is redirected film, it is characterised in that the light is redirected film edge and hangs down with its length direction
Straight direction, the cycle of the optical coupling grating of diverse location and orientation are different, and are determined by following factor：The light of vertical incidence
The extrorse optical coupling grating in film length side is redirected through light and is coupled into light coupling layer, and light is redirected direction in the middle part of film to light
Propagate.
9. light according to claim 3 is redirected film, it is characterised in that the optical coupling grating is nanometer diffraction grating.
10. light according to claim 9 is redirected film, it is characterised in that the cycle of the nanometer diffraction grating, the angle of orientation
Meet following relation：
(1)tanφ1=sin φ/(cos φ-nsin θ (Λ/λ))
(2)sin2(θ1)=(λ/Λ)2+(nsinθ)2-2nsinθcosφ(λ/Λ)
Wherein, light incides X/Y plane, θ at an angle1And φ1The angle of diffraction and diffraction light of diffraction light are represented successively
Azimuth, θ and λ represent the incidence angle and wavelength of light source successively, and Λ and φ represent cycle and the orientation of nanometer diffraction grating successively
Angle, n represent the spreading rate of light wave in media as well, wherein, the angle of diffraction is diffracted ray and z-axis positive direction angle；Azimuth is to spread out
Penetrate light and positive direction of the x-axis angle；Incidence angle is incident ray and z-axis positive direction angle；The angle of orientation for groove profile direction and y-axis just
Angular separation.
11. light according to claim 10 is redirected film, it is characterised in that convex between the nanometer diffraction grating groove
The upper end for playing part is prismatic structure.
12. a kind of photovoltaic cell component, it is characterised in that the photovoltaic module includes multiple cell pieces, connects the weldering of cell piece
Band and the light as described in claim 1-11 is any are redirected film, between the welding upper surface and/or the cell piece between
Gap region is provided with the light and is redirected film.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711414544.2A CN107994082A (en) | 2017-12-22 | 2017-12-22 | A kind of light is redirected film and photovoltaic cell component |
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| CN201711414544.2A CN107994082A (en) | 2017-12-22 | 2017-12-22 | A kind of light is redirected film and photovoltaic cell component |
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