CN208873740U - A kind of solar battery structure - Google Patents
A kind of solar battery structure Download PDFInfo
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- CN208873740U CN208873740U CN201822027324.0U CN201822027324U CN208873740U CN 208873740 U CN208873740 U CN 208873740U CN 201822027324 U CN201822027324 U CN 201822027324U CN 208873740 U CN208873740 U CN 208873740U
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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
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- 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
- Y02E10/52—PV systems with concentrators
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
This application discloses a kind of solar battery structures and preparation method thereof, it includes solar battery epitaxial structure that the solar battery structure, which removes, substrat structure, outside electrode structure, it further include the transparent concentration structure for deviating from the substrat structure side positioned at the solar battery epitaxial structure, so as to utilize the sunray of plane and the transparent concentration structure side wall incidence where the transparent concentration structure aggregation solar battery structure, light after aggregation is transmitted to the side that solar battery epitaxial structure deviates from the substrat structure, increase the light-absorbing area of solar battery epitaxial structure, improve the light absorption amount of the solar battery epitaxial structure, to improve the photoelectric conversion efficiency of the solar battery structure.
Description
Technical field
This application involves solar battery structure technical fields, more particularly to a kind of solar battery structure and its production
Method.
Background technique
Solar energy will not generate the substances such as any waste water, waste residue in use, will not cause secondary pollution to environment,
It is a kind of environmentally protective, free of contamination renewable energy.Worldwide under the situation of energy supply anxiety, make full use of too
Positive energy, can not only alleviate this situation of energy shortage, but also meet the theory of green living, low-carbon life.Solar battery can be with
Solar energy is directly changed into electric energy using photovoltaic effect, so that solar battery industry is fast-developing in recent years.
But the utilization rate of existing solar battery solar energy is low, cause the photoelectric conversion efficiency of solar battery compared with
It is low.
Utility model content
The purpose of the application is to provide a kind of solar battery structure and preparation method thereof, to improve solar battery structure
Photoelectric conversion efficiency.
In order to solve the above technical problems, the application the following technical schemes are provided:
A kind of solar battery structure, comprising:
Substrat structure；
Solar battery epitaxial structure positioned at first side of substrat structure；
Deviate from the transparent concentration structure of the substrat structure side positioned at the solar battery epitaxial structure；
Deviate from the substrat structure side positioned at the solar battery epitaxial structure, with the solar battery epitaxy junction
The electrode structure of structure electrical connection.
Optionally, the transparent concentration structure includes at least one condensing body, and the shape of the condensing body is semi-oval.
Optionally, the transparent concentration structure includes multiple condensing bodies, and the multiple condensing body is arranged in array.
Optionally, the material of the condensing body is transparent conductive material.
Optionally, the height value range of the condensing body is 0.5 micron -5 microns, including endpoint value.
Optionally, the diameter value range of the condensing body and the contact surface of the solar battery epitaxial structure is 10 micro-
- 50 microns of rice, including endpoint value.
Optionally, the refractive index value range of the transparent concentration structure is 1.2-2.7, including endpoint value.
The application also provides a kind of production method of solar battery structure, comprising:
Solar battery epitaxial structure is prepared on substrat structure；
Electrode structure, the electrode structure and the solar energy are formed in second side of the solar battery epitaxial structure
Second side of battery epitaxial structure is electrically connected, and described second side is away from the side of the substrat structure；
Transparent concentration structure, the position of the transparent concentration structure are formed in second side of the solar battery epitaxial structure
It sets not be overlapped with the position of the electrode structure.
Optionally, described second side in the solar battery epitaxial structure forms transparent concentration structure and includes:
Using transparent material, at least one condensing body is formed in second side of the solar battery epitaxial structure, with shape
At transparent concentration structure.
Optionally, described second side in the solar battery epitaxial structure forms transparent concentration structure and includes:
Using transparent conductive material, multiple condensing bodies are formed in second side of the solar battery epitaxial structure, with shape
At transparent concentration structure.
Solar battery structure provided herein, except including solar battery epitaxial structure, substrat structure, electrode knot
It further include the transparent concentration structure for deviating from the substrat structure side positioned at the solar battery epitaxial structure outside structure, thus
Plane and the transparent concentration structure side wall are incident where can use the transparent concentration structure aggregation solar battery structure
Sunray, by the light after aggregation be transmitted to solar battery epitaxial structure deviate from the substrat structure side, increase
The light-absorbing area of solar battery epitaxial structure, improves the light absorption amount of the solar battery epitaxial structure,
To improve the photoelectric conversion efficiency of the solar battery epitaxial structure.
Detailed description of the invention
It, below will be to embodiment or existing for the clearer technical solution for illustrating the embodiment of the present application or the prior art
Attached drawing needed in technical description is briefly described, it should be apparent that, the accompanying drawings in the following description is only this Shen
Some embodiments please for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of solar battery structure provided herein；
Fig. 2 is the schematic diagram that concentration structure assembles sunlight in solar battery structure provided herein；
Fig. 3 is another structural schematic diagram of solar battery structure provided herein；
Fig. 4 is a kind of flow chart of the production method of solar battery structure provided herein.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, with reference to the accompanying drawings and detailed description
The application is described in further detail.Obviously, described embodiments are only a part of embodiments of the present application, rather than
Whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall in the protection scope of this application.
Many details are explained in the following description in order to fully understand the utility model, but this is practical new
Type can also be implemented using other than the one described here other way, and those skilled in the art can be without prejudice to this Shen
Similar popularization please be done in the case where intension, therefore the application is not limited by the specific embodiments disclosed below.
Just as described in the background section, the utilization rate of existing solar battery solar energy is low, leads to solar battery
Photoelectric conversion efficiency it is lower.
In view of this, this application provides a kind of solar battery structure, referring to FIG. 1, Fig. 1 is provided herein
A kind of structural schematic diagram of solar battery structure, the solar battery structure include:
The material of substrat structure 1, the substrat structure 1 can choose germanium, i.e., the described substrat structure is germanium substrate, can also be with
Select GaAs, i.e., it can also be other materials that the described substrat structure, which is gallium arsenide substrate, the application to this and without limitation,
Specifically depend on the circumstances；
Solar battery epitaxial structure 2 positioned at 1 first side of substrat structure；
Deviate from the transparent concentration structure 3 of 1 side of substrat structure positioned at the solar battery epitaxial structure 2；
Deviate from 1 side of substrat structure positioned at the solar battery epitaxial structure 2, with the solar battery extension
The electrode structure 4 that structure 2 is electrically connected.
Specifically, in one embodiment of the application, the solar battery epitaxial structure 2 include n type semiconductor layer,
P type semiconductor layer and the luminescent layer between n type semiconductor layer and p type semiconductor layer.But the application does not limit this
Fixed, in the other embodiments of the application, the solar battery epitaxial structure 2 can also include other structures, specifically regard feelings
Depending on condition.
Based on any of the above embodiments, in one embodiment of the application, the transparent concentration structure 3 includes
At least one condensing body, i.e., in the embodiment of the present application, the transparent concentration structure can only include a condensing body, can also be with
Including multiple condensing bodies, the application to this and without limitation, specifically depends on the circumstances.
It should be noted that in the embodiment of the present application, the quantity of the condensing body is more, the solar battery structure
Increased illuminating area is bigger, and received amount light is more, and photoelectric conversion efficiency is higher.
Referring to FIG. 2, Fig. 2 is the signal that condensing body assembles sunlight in solar battery structure provided herein
Figure.From figure 2 it can be seen that the condensing body can not only be assembled from directive institute right above the solar battery epitaxial structure
The light that solar battery epitaxial structure deviates from one side surface of substrat structure is stated, optically focused side described in directive can also be assembled
The light-ray condensing of optically focused body side surface described in directive to the solar battery epitaxial structure is deviated from the substrate knot by the light in face
The light of structure side increases the received amount light of solar battery epitaxial structure.
It can be seen that in the embodiment of the present application, the purpose that the transparent concentration structure 3 is arranged is to assemble described in directive too
Positive energy battery epitaxial structure 2 deviates from light and 3 side wall of the transparent concentration structure incidence on the surface of 1 side of substrat structure
Sunray, be transmitted to the solar battery epitaxial structure 2 away from the lining by light-ray condensing, and by the light after aggregation
The surface of 1 side of bottom structure increases the light-absorbing area of the solar battery epitaxial structure 2, improves the solar-electricity
The light receiver amount of pond epitaxial structure 2 to improve the light utilization of the solar battery epitaxial structure 2, and then improves
The photoelectric conversion efficiency of the solar battery structure.
It should be noted that the material of the transparent concentration structure 3 is not limited specifically in the present embodiment, as long as
The material for guaranteeing the transparent concentration structure is transparent material, so that the light of transparent concentration structure side described in directive can be with
Through the transparent concentration structure, do not absorbed by the transparent concentration structure.
It should also be noted that, also the refractive index of the transparent concentration structure 3 is not limited specifically in the present embodiment,
It can depend on the circumstances, as long as the refractive index of the transparent concentration structure 3 is greater than the refractive index of air, aggregation light can be played
And the light of aggregation is transmitted to the surface that the solar battery epitaxial structure 2 deviates from 1 side of substrat structure.
Optionally, on the basis of the above embodiments, in one embodiment of the application, the transparent concentration structure 3
Refractive index value range be 1.2-2.7, including endpoint value is too small to avoid transparent 3 refractive index of concentration structure, optically focused effect
Fruit is bad, and it is less to make to be transmitted to surface amount light of the solar battery epitaxial structure 2 away from 1 side of substrat structure,
It is limited to make solar battery structure photoelectric conversion efficiency be promoted, while avoiding 3 refractive index of transparent concentration structure too big,
Cause the refractive index difference of the concentration structure and air too big, causes solar battery epitaxial structure 2 described in directive away from institute
The light on the surface of 1 side of substrat structure and the sunray rebound of 3 side wall of the transparent concentration structure incidence are stated, light is influenced
Congregational rate, so that it is limited to promote solar battery structure photoelectric conversion efficiency, but the application is to this and without limitation, specifically
It depends on the circumstances.
Based on any of the above embodiments, in one embodiment of the application, electrode structure 4 includes first electrode
And second electrode, in one embodiment of the application, first electrode is N-type electrode, and second electrode is P-type electrode, in this Shen
In another embodiment please, the first electrode is P-type electrode, and the second electrode is N-type electrode.The application to this not
It limits, specifically depends on the circumstances, as long as guaranteeing that the N-type electrode is connect with n type semiconductor layer, P-type electrode and P-type semiconductor
Layer connection.
Optionally, in one embodiment of the application, the material of the electrode structure 4 is metal, i.e., described first electricity
Extremely metal electrode, the second electrode is metal electrode, but the application is to this and without limitation, other in the application are implemented
In example, the material of the electrode structure 4 can also be other conductive materials, preferably electric conductivity number, the low material of resistivity, tool
Body depends on the circumstances.
Solar battery structure provided herein, except including solar battery epitaxial structure 2, substrat structure 1, electrode
It further include the transparent concentration structure for deviating from 1 side of substrat structure positioned at the solar battery epitaxial structure 2 outside structure 4
3, so as to assemble solar battery structure place plane and the transparent concentration structure 3 using the transparent concentration structure 3
Light after aggregation is transmitted to solar battery epitaxial structure 2 away from the substrat structure 1 by the sunray of side wall incidence
Side increases the light-absorbing area of the solar battery epitaxial structure 2, improves the solar battery epitaxial structure 2
Light absorption amount, to improve the photoelectric conversion efficiency of the solar battery epitaxial structure 2.
Based on any of the above embodiments, in one embodiment of the application, institute in the transparent concentration structure 3
State condensing body shape be semi-oval, from the vertex of the condensing body to the condensing body with the solar battery epitaxy junction
The face that the edge of the contact surface of structure 2 is constituted is curved surface, improves the spotlight effect of the condensing body, is increased from the optically focused body sidewall
The light of aggregation is transmitted to the solar battery epitaxial structure 2 away from the substrate by the amount light of injection, the condensing body
The side of structure 1 further increases the amount light that the solar battery epitaxial structure 2 absorbs, to improve solar battery
The photoelectric conversion efficiency of structure.But the application is to this and without limitation, and in the other embodiments of the application, the condensing body is also
It can be the other shapes such as projection shape or taper, as long as guaranteeing that the condensing body can be by the light of optically focused body side surface described in directive
Line is transmitted to the side surface that the solar battery epitaxial structure 2 deviates from the substrat structure 1.
Based on any of the above embodiments, in one embodiment of the application, the transparent concentration structure 3 includes
Multiple condensing bodies, optionally, the multiple condensing body are arranged in array.
Specifically, on the basis of the above embodiments, in one embodiment of the application, multiple condensing bodies are uniformly distributed
Deviate from the side of the substrat structure 1 in the solar battery epitaxial structure 2, described in the directive assembled as each condensing body
Solar battery epitaxial structure 2 is incident away from the amount light on the surface of 1 side of substrat structure and from the optically focused body sidewall
Sunray amount it is of substantially equal so that being transmitted to the sunray amount base of the solar battery epitaxial structure 2 everywhere
This is equal, keeps the photoelectric conversion efficiency of solar battery structure everywhere of substantially equal, improves the solar battery structure everywhere
The uniformity of photoelectric conversion efficiency.
Based on any of the above embodiments, in one embodiment of the application, the material of the condensing body is only
Transparent material.In another embodiment of the application, it is also conduction material that the material of the condensing body, which is not only transparent material,
Material, i.e., the material of the described condensing body is transparent conductive material, so that the condensing body and the epitaxial structure and the electrode
Structure electrical connection, improves the electrical contact performance of the electrode structure Yu the epitaxial structure.But the application is to this and without limitation,
Specifically depend on the circumstances.
Specifically, the transparent conductive material can be tin indium oxide (ITO), indium in one embodiment of the application
Zinc oxide (IZO), indium gallium zinc oxide (IGZO), aluminum zinc oxide (AZO), aluminium oxide (Al2O3), titanium dioxide (TiO2), five
Aoxidize Tritanium/Trititanium (Ti3O5), tantalum pentoxide (Ta2O5), silicon nitride (SiNx), silica (SiOx) at least one of material.This Shen
Please to this and without limitation, it specifically depends on the circumstances.
Based on any of the above embodiments, in one embodiment of the application, the height value of the condensing body
Range is 0.5 micron -5 microns, including endpoint value, i.e., the described condensing body is along perpendicular to solar battery epitaxial structure surface
The value range of size on direction is 0.5 micron -5 microns, including endpoint value, and the height to avoid the condensing body is too low,
The area of the optically focused body side surface is small, and the amount of light that the slave side wall of aggregation is injected is limited, to make to inject the solar-electricity
Epitaxial structure 2 amount of light in pond is limited, smaller to the photoelectric conversion efficiency raising of the solar battery structure, while avoiding institute
The height for stating concentration structure is too high, keeps solar battery structure integral thickness too big, influences the use of solar battery structure.
Based on any of the above embodiments, in one embodiment of the application, the condensing body and the sun
The diameter value range of the contact surface of energy battery epitaxial structure 2 is 10 microns -50 microns, including endpoint value, to avoid described poly-
The volume of body of light is too big, influences the quantity of condensing body in the solar battery structure, to influence the solar battery knot
The promotion of the photoelectric conversion efficiency of structure, while avoiding the volume of the condensing body too small, increase technology difficulty, but the application is to this
And without limitation, it specifically depends on the circumstances.
Based on any of the above embodiments, in one embodiment of the application, as shown in figure 3, the solar energy
Battery structure further include: deviate from the package substrate 5 of 2 side of solar battery epitaxial structure positioned at the substrat structure 1, with
Be packaged using other structures of the package substrate to the solar battery structure, to the solar battery structure into
Row protection, but the application is to this and without limitation, specifically depends on the circumstances.
In addition, present invention also provides a kind of production method of solar battery structure, referring to FIG. 4, Fig. 3 is the application
A kind of flow chart of the production method of provided solar battery structure, this method comprises:
Step S101: solar battery epitaxial structure is prepared on substrat structure.
Specifically, in one embodiment of the application, the solar battery epitaxial structure includes the first the half of stacking
Conductor layer, luminescent layer and the second semiconductor layer, specifically, being made on substrat structure in a kind of implementation of the present embodiment
Standby solar battery epitaxial structure includes: that the first semiconductor layer is formed on substrat structure, in the first semiconductor layer away from described
Substrat structure side forms luminescent layer, forms the second semiconductor layer away from the side of first semiconductor layer in luminescent layer.?
In the other embodiments of the application, the solar battery epitaxial structure can also include other structures, the application to this not
It limits, specifically depends on the circumstances.
On the basis of the above embodiments, in one embodiment of the application, first semiconductor layer is that N-type is partly led
Body layer, second semiconductor layer are p type semiconductor layer；In another embodiment of the application, first semiconductor layer
For p type semiconductor layer, second semiconductor layer is n type semiconductor layer, the application to this and without limitation, specifically optionally and
It is fixed.
Based on any of the above embodiments, in one embodiment of the application, the material of the substrat structure can
To select germanium, i.e., the described substrat structure is germanium substrate, also can choose GaAs, i.e., the described substrat structure is gallium arsenide substrate,
It can also be other materials, the application to this and without limitation, specifically depends on the circumstances.
Step S102: the solar battery epitaxial structure second side formed electrode structure, the electrode structure with
Second side of the solar battery epitaxial structure is electrically connected, and described second side is away from the side of the substrat structure.
In one embodiment of the application, electrode structure is formed in second side of the solar battery epitaxial structure
When, electrode structure includes first electrode and second electrode, can set first electrode to N-type electrode, and second electrode is set as P
Type electrode, certainly can also set first electrode to P-type electrode, and second electrode is set as N-type electrode, the application to this not
It is specifically limited, specifically depends on the circumstances, as long as guaranteeing the n type semiconductor layer electricity of N-type electrode and solar battery epitaxial structure
Connection, P-type electrode are electrically connected with the p type semiconductor layer of solar battery epitaxial structure.
Optionally, in one embodiment of the application, metal electrode can be set by the electrode structure, i.e., by institute
It states first electrode and is set as metal electrode, the second electrode is also configured as metal electrode, but the application does not limit this
It is fixed, in the other embodiments of the application, other conduction materials can also be set by the first electrode and the second electrode
Material, preferably good conductivity, the low material of resistivity specifically depend on the circumstances.
Step S103: forming transparent concentration structure in second side of the solar battery epitaxial structure, described transparent poly-
The position of photo structure and the position of the electrode structure be not be overlapped.
In the present embodiment, transparent concentration structure is formed in second side of the solar battery epitaxial structure, can be assembled
Light and the transparent concentration structure of the solar battery epitaxial structure described in directive away from the surface of the substrat structure side
The sunray of side wall incidence, and the light after aggregation is transmitted to the solar battery epitaxial structure away from the substrate knot
The surface of structure side increases the light-absorbing area of the solar battery epitaxial structure, improves outside the solar battery
Prolong the light receiver amount of structure, so that the light utilization of the solar battery epitaxial structure be made to improve.
In one embodiment of the application, the transparent concentration structure includes at least one condensing body, i.e., in the application
In embodiment, it also may include multiple condensing bodies, the application is to this that the transparent concentration structure, which can only include a condensing body,
And without limitation, it specifically depends on the circumstances.
It should be noted that in the embodiment of the present application, the quantity of the condensing body is more, the solar battery structure
Increased illuminating area is bigger, and received amount light is more, and photoelectric conversion efficiency is higher.
Optionally, on the basis of the above embodiments, in one embodiment of the application, the transparent concentration structure
Refractive index value range is 1.2-2.7, including endpoint value, spotlight effect too small to avoid the transparent concentration structure refractive index
Bad, it is less to make to be transmitted to surface amount light of the solar battery epitaxial structure away from the substrat structure side, thus
It promotes solar battery structure photoelectric conversion efficiency limited, while avoiding the transparent concentration structure refractive index too big, cause
The refractive index difference of the concentration structure and air is too big, causes solar battery epitaxial structure described in directive away from the substrate
The light on the surface of 1 side of structure and the rebound of the sunray of the transparent concentration structure side wall incidence, influence light-ray condensing effect
Fruit, so that it is limited to promote solar battery structure photoelectric conversion efficiency, but the application is to this and without limitation, as long as guarantee institute
The refractive index for stating transparent concentration structure is greater than the refractive index of air, can play focusing light effect.
Based on any of the above embodiments, in one embodiment of the application, institute in the transparent concentration structure
State condensing body shape be semi-oval, from the vertex of the condensing body to the condensing body with the solar battery epitaxy junction
The face that the edge of the contact surface of structure is constituted is curved surface, improves the spotlight effect of the condensing body, is increased from the optically focused body sidewall
The light of aggregation is transmitted to the solar battery epitaxial structure away from the substrate knot by the amount light of injection, the condensing body
The side of structure further increases the amount light that the solar battery epitaxial structure absorbs, to improve solar battery structure
Photoelectric conversion efficiency.But the application is to this and without limitation, and in the other embodiments of the application, the condensing body can be with
For other shapes such as projection shape or tapers, as long as guaranteeing that the condensing body can pass the light of optically focused body side surface described in directive
Transport to the side surface that the solar battery epitaxial structure deviates from the substrat structure.
Based on any of the above embodiments, in one embodiment of the application, the transparent concentration structure includes
Multiple condensing bodies, optionally, the multiple condensing body are arranged in array.
Specifically, on the basis of the above embodiments, in one embodiment of the application, multiple condensing bodies are uniformly distributed
Deviate from the side of the substrat structure in the solar battery epitaxial structure, described in the directive assembled as each condensing body too
Sun energy battery epitaxial structure is incident too away from the amount light on the surface of the substrat structure side and from the optically focused body sidewall
Positive amount light is of substantially equal, so that being transmitted to the basic phase of sunray amount of the solar battery epitaxial structure everywhere
Deng keeping the photoelectric conversion efficiency of solar battery structure everywhere of substantially equal, improve solar battery structure photoelectricity everywhere
The uniformity of transfer efficiency.
Based on any of the above embodiments, in one embodiment of the application, the material of the condensing body is only
Transparent material forms transparent concentration structure packet in second side of the solar battery epitaxial structure in the embodiment of the present application
It includes: using transparent material, forming at least one condensing body in second side of the solar battery epitaxial structure, it is transparent to be formed
Concentration structure.
In another embodiment of the application, it is also conductive material that the material of the condensing body, which is not only transparent material,
The material of the i.e. described condensing body is transparent conductive material, so that the condensing body and the epitaxial structure and the electrode structure
Electrical connection, improves the electrical contact performance of the electrode structure Yu the epitaxial structure.But the application is to this and without limitation, specifically
It depends on the circumstances.In the embodiment of the present application, transparent concentration structure is formed in second side of the solar battery epitaxial structure
It include: to form multiple condensing bodies in second side of the solar battery epitaxial structure using transparent conductive material, it is saturating to be formed
Bright concentration structure.
Specifically, the transparent conductive material can be tin indium oxide (ITO), indium in one embodiment of the application
Zinc oxide (IZO), indium gallium zinc oxide (IGZO), aluminum zinc oxide (AZO), aluminium oxide (Al2O3), titanium dioxide (TiO2), five
Aoxidize Tritanium/Trititanium (Ti3O5), tantalum pentoxide (Ta2O5), silicon nitride (SiNx), silica (SiOx) at least one of material.This Shen
Please to this and without limitation, it specifically depends on the circumstances.
Based on any of the above embodiments, in one embodiment of the application, the height value of the condensing body
Range is 0.5 micron -5 microns, including endpoint value, i.e., the described condensing body is along perpendicular to solar battery epitaxial structure surface
The value range of size on direction is 0.5 micron -5 microns, including endpoint value, and the height to avoid the condensing body is too low,
The area of the optically focused body side surface is small, and the amount of light that the slave side wall of aggregation is injected is limited, to make to inject the solar-electricity
Pond epitaxial structure amount of light is limited, smaller to the photoelectric conversion efficiency raising of the solar battery structure, while avoiding institute
The height for stating concentration structure is too high, keeps solar battery structure integral thickness too big, influences the use of solar battery structure.
Based on any of the above embodiments, in one embodiment of the application, the condensing body and the sun
The diameter value range of the contact surface of energy battery epitaxial structure is 10 microns -50 microns, including endpoint value, to avoid the optically focused
The volume of body is too big, influences the quantity of condensing body in the solar battery structure, to influence the solar battery structure
Photoelectric conversion efficiency promotion, while avoiding the volume of the condensing body too small, increase technology difficulty, but the application to this simultaneously
Without limitation, it specifically depends on the circumstances.
Specifically, based on any of the above embodiments, in one embodiment of the application, in the solar-electricity
Second side of pond epitaxial structure forms transparent concentration structure
Protective layer is formed away from the side of the solar battery epitaxial structure in the electrode structure；
Using the protective layer as exposure mask, transparent concentration structure is formed in second side of the solar battery epitaxial structure,
To protect using the protective layer to the electrode structure, the electrode structure is avoided to be formed in the transparent concentration structure
It causes to damage in the process, influences the performance of the solar battery structure；
Remove the protective layer.
It should be noted that in the present embodiment, the production method of the solar battery structure be with elder generation it is described too
Second side of positive energy battery epitaxial structure forms electrode structure, then is formed in second side of the solar battery epitaxial structure
Be described for bright concentration structure, but the application is to this and without limitation, in the other embodiments of the application, it is described too
The production method of positive energy battery structure first can also form transparent optically focused knot in second side of the solar battery epitaxial structure
Structure, then electrode structure is formed in second side of the solar battery epitaxial structure, specifically depend on the circumstances.
Based on any of the above embodiments, in one embodiment of the application, the solar battery structure
Production method further include: the substrat structure is fixed on package substrate away from the side of the solar battery epitaxial structure
On.
To sum up, the solar battery structure of solar battery structure production method production provided herein, except including
Solar battery epitaxial structure, substrat structure further include being located at the solar battery epitaxial structure away from institute outside electrode structure
The transparent concentration structure of substrat structure side is stated, so as to assemble solar battery structure institute using the transparent concentration structure
In the sunray of plane and the transparent concentration structure side wall incidence, the light after aggregation is transmitted to solar battery extension
Structure deviates from the side of the substrat structure, increases the light-absorbing area of solar battery epitaxial structure, described in raising
The light absorption amount of solar battery epitaxial structure, to improve the photoelectric conversion efficiency of the solar battery epitaxial structure.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with it is other
The difference of embodiment, same or similar part may refer to each other between each embodiment.For being filled disclosed in embodiment
For setting, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is referring to method part
Explanation.
Solar battery structure and preparation method thereof provided herein is described in detail above.It answers herein
With specific case, the principle and implementation of this application are described, and the explanation of above example is only intended to help to manage
Solve the present processes and its core concept.It should be pointed out that for those skilled in the art, not departing from
Under the premise of the application principle, can also to the application, some improvement and modification can also be carried out, these improvement and modification also fall into this Shen
It please be in scope of protection of the claims.
Claims (7)
1. a kind of solar battery structure characterized by comprising
Substrat structure；
Solar battery epitaxial structure positioned at first side of substrat structure；
Deviate from the transparent concentration structure of the substrat structure side positioned at the solar battery epitaxial structure；
Deviate from the substrat structure side positioned at the solar battery epitaxial structure, with the solar battery epitaxial structure electricity
The electrode structure of connection.
2. solar battery structure as described in claim 1, which is characterized in that the transparent concentration structure includes at least one
Condensing body, the shape of the condensing body are semi-oval.
3. solar battery structure as described in claim 1, which is characterized in that the transparent concentration structure includes multiple optically focused
Body, the multiple condensing body are arranged in array.
4. solar battery structure as claimed in claim 2 or claim 3, which is characterized in that the material of the condensing body is transparent leads
Electric material.
5. solar battery structure as claimed in claim 2, which is characterized in that the height value range of the condensing body is
0.5 micron -5 microns, including endpoint value.
6. solar battery structure as claimed in claim 2, which is characterized in that outside the condensing body and the solar battery
The diameter value range for prolonging the contact surface of structure is 10 microns -50 microns, including endpoint value.
7. solar battery structure as described in claim 1, which is characterized in that the refractive index value of the transparent concentration structure
Range is 1.2-2.7, including endpoint value.
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| CN109378353A (en) * | 2018-12-04 | 2019-02-22 | 厦门乾照半导体科技有限公司 | A kind of solar battery structure and preparation method thereof |
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