CN113380913B - Super-flexible thin film battery assembly structure and preparation method - Google Patents
Super-flexible thin film battery assembly structure and preparation method Download PDFInfo
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- CN113380913B CN113380913B CN202110521339.6A CN202110521339A CN113380913B CN 113380913 B CN113380913 B CN 113380913B CN 202110521339 A CN202110521339 A CN 202110521339A CN 113380913 B CN113380913 B CN 113380913B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 40
- 239000010409 thin film Substances 0.000 title claims description 50
- 239000010410 layer Substances 0.000 claims abstract description 116
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 47
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 47
- 239000011733 molybdenum Substances 0.000 claims abstract description 47
- 239000000758 substrate Substances 0.000 claims abstract description 39
- 239000002346 layers by function Substances 0.000 claims abstract description 31
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 18
- 239000011734 sodium Substances 0.000 claims abstract description 18
- 239000010408 film Substances 0.000 claims description 87
- 238000000034 method Methods 0.000 claims description 69
- 239000002313 adhesive film Substances 0.000 claims description 31
- 239000000047 product Substances 0.000 claims description 25
- 238000004806 packaging method and process Methods 0.000 claims description 23
- 238000005240 physical vapour deposition Methods 0.000 claims description 21
- 238000009413 insulation Methods 0.000 claims description 18
- 230000007547 defect Effects 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 239000002390 adhesive tape Substances 0.000 claims description 12
- 238000005229 chemical vapour deposition Methods 0.000 claims description 11
- 238000007731 hot pressing Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 4
- 238000012858 packaging process Methods 0.000 claims description 4
- 238000007639 printing Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000010549 co-Evaporation Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 238000004544 sputter deposition Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 13
- QMXBEONRRWKBHZ-UHFFFAOYSA-N [Na][Mo] Chemical compound [Na][Mo] QMXBEONRRWKBHZ-UHFFFAOYSA-N 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920006280 packaging film Polymers 0.000 description 3
- 239000012785 packaging film Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 150000002484 inorganic compounds Chemical class 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000005021 flexible packaging material Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- 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
- H01L31/0445—PV modules or arrays of single PV cells including thin film solar cells, e.g. single thin film a-Si, CIS or CdTe solar cells
- H01L31/046—PV modules composed of a plurality of thin film solar cells deposited on the same substrate
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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
- H01L31/048—Encapsulation of modules
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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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
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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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- 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
The invention discloses an ultra-soft film battery component structure and a preparation method thereof, wherein the battery component structure comprises a substrate, a high-sodium molybdenum layer, a functional molybdenum layer, a photoelectric conversion layer, a window functional layer and a front electrode layer, wherein the high-sodium molybdenum layer is arranged on the surface of the substrate, the functional molybdenum layer is arranged on the surface of the high-sodium molybdenum layer, the photoelectric conversion layer is arranged on the surface of the functional molybdenum layer, the window functional layer is arranged on the surface of the photoelectric conversion layer, the front electrode layer is arranged on the surface of the window functional layer, the substrate, the high-sodium molybdenum layer, the functional molybdenum layer, the photoelectric conversion layer, the window functional layer and the front electrode layer are sequentially overlapped to form a film battery complete structure, and the ultra-soft film battery comprises a surface main grid and a surface fine grid, wherein the surface main grid and the surface fine grid are arranged on the surface of the front electrode layer of the film battery complete structure.
Description
Technical Field
The invention relates to the technical field of photovoltaic cells, in particular to an ultra-soft thin film battery assembly structure and a preparation method thereof.
Background
At present, the structure of the photovoltaic cell is mature, the whole structure of the photovoltaic cell is fixed according to the types of the photovoltaic cells corresponding to different technical routes, and other structural batteries which are respectively innovated or changed in structure are defined as novel derivative efficient batteries. The preparation method and the process flow of each structural functional layer of the battery are also common, and the corresponding method is only different in detail from the conventional technological means. In addition, the current mainstream photovoltaic cell adopts silicon as a substrate to change into a rigid structure, so that flexible application cannot be realized; thin film batteries are more heterogeneous than silicon-based batteries, but structurally have the following problems: the preparation of each functional layer of the film is based on glass, stainless steel or a flexible substrate with specific requirements, and the appearance of each functional layer is changed for the packaging process of a subsequent component after the preparation, so that the manufacturing of a terminal photovoltaic product is achieved. One of the main characteristics of the whole process and the product is insufficient flexibility, can not be matched with and meet the requirement of super-flexibility, and greatly limits the application field and the space. The super-flexible battery is often characterized in that a substrate material with better flexibility is used for preparing the flexible battery, or a crystallized film battery is adopted to strip a crystallized film chip from a homogeneous single crystal wafer in a corrosion stripping mode, and then a semiconductor processing mode is adopted to finish the manufacture of small-size and small-scale products, and the corresponding problems are mainly characterized by high cost, poor essential improvement of flexibility, severe technological process and requirements, and unfavorable mass production. Therefore, the ultra-soft thin film battery and the corresponding technological process and the like are urgently required to be broken through, and the blank of market application products is matched.
The preparation method of the flexible film battery has the following problems and disadvantages with different degrees:
1. the silicon-based battery is packaged by adopting a flexible packaging material with smaller curvature or small bending degree, and the formed component products can only show smaller bending and cannot form products required by application in scenes with larger curvature.
2. The conventional thin film battery has a substrate integrated structure, and the prepared flexible thin film battery is provided with the thickness and flexibility of the related substrate, so that the thickness of the whole thin film battery is increased and the flexibility is poor, and the ultra-flexible structure and application cannot be realized.
3. The organic solar cell technology is adopted to prepare the organic cells and components on the ultrathin organic flexible substrate, and the technology has the biggest defects of low efficiency, poor stability, short service life and incapability of large-scale production.
4. And after the crystallized film battery is prepared on the wafer, peeling the crystallized film battery in a corrosion mode, then adopting a semiconductor operation rule method to carry out subsequent processing and operation, and packaging the peeled battery on a flexible substrate or a material to realize the purpose of the flexible battery. The method has the defects of multiple preparation flows, high requirements, narrow process window, high wafer cost, low material utilization rate and high product cost, and cannot realize large-scale mass production.
5. The ultra-soft film battery and the component products are blank in the market at present, and lack of related products, particularly lack of a preparation process method of the ultra-soft film battery, and low-cost and batch preparation of the ultra-soft film battery cannot be realized.
It is therefore particularly important to solve the problems caused by the implementation manner of the flexibility of the conventional flexible thin film battery.
Disclosure of Invention
The invention aims to provide an ultra-soft thin film battery assembly structure and a preparation method thereof, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an ultra-soft film battery assembly structure, battery assembly structure includes substrate, high sodium molybdenum layer, function molybdenum layer, photoelectric conversion layer, window functional layer and front electrode layer, high sodium molybdenum layer sets up in the substrate surface, the function molybdenum layer sets up in high sodium molybdenum layer surface, photoelectric conversion layer sets up in function molybdenum layer surface, window functional layer sets up in photoelectric conversion layer surface, front electrode layer sets up in window functional layer surface, substrate, high sodium molybdenum layer, function molybdenum layer, photoelectric conversion layer, window functional layer and front electrode layer stack in proper order and form the complete structure of film battery, still include surface main grid and surface fine grid, surface main grid and surface fine grid interval set up in the front electrode layer surface of the complete structure of film battery.
Preferably, an edge insulating adhesive tape is laid on the front electrode layer of the integral structure of the thin film battery corresponding to one end of the surface main grid, the width of the edge insulating adhesive tape is 0.1-50 mm, and the surface main grid is connected with the surface main grid to be connected with the output electrode.
Preferably, a secondary back electrode is arranged on the back of the whole structure of the thin film battery, and the high-sodium molybdenum layer, the functional molybdenum layer, the photoelectric conversion layer, the window functional layer, the front electrode layer and the secondary back electrode form an integral photovoltaic cell.
Preferably, the secondary back electrode connecting component outputs an anode, and the main gate connecting output electrode connecting component outputs a cathode.
Preferably, the back of the integral photovoltaic cell is further provided with a module back film, and the front of the integral photovoltaic cell is provided with a module front film and a light receiving surface.
Preferably, an output connection insulation area structure is arranged at the edge insulation adhesive tape, and a lower insulation adhesive film is arranged at the end part of the surface main gate close to the lower end surface of the output connection insulation area structure.
Preferably, the preparation method comprises the following steps:
A. after cleaning and preparing the substrate material, preparing a high-sodium molybdenum layer on the substrate by adopting PVD or a related process method;
B. preparing a molybdenum back electrode, namely a functional molybdenum layer, on the high-sodium molybdenum layer by adopting a PVD (physical vapor deposition) or related process method, and then preparing a photoelectric conversion layer by adopting a sputtering re-selenizing or co-evaporation method or an ECD (electron cyclotron resonance) or RTP (rapid thermal process) method on the whole finished molybdenum back electrode to finish the preparation of the light absorption layer;
C. after the preparation of the photoelectric conversion layer is finished, preparing a window functional layer by adopting a PVD (physical vapor deposition) or CVD (chemical vapor deposition) technology method, wherein the window functional layer is different according to different battery technology routes and types and can be of a multi-layer composite film structure or a single-layer film structure according to requirements such as interface and energy band matching;
D. preparing a front electrode layer on the window functional layer in a PVD or CVD mode, and completing the whole structure of the thin film battery after the process steps are completed;
E. preparing a surface fine grid line and a surface main grid line on a front electrode layer of a complete structure of the thin film battery in a manner of printing or attaching a metal wire;
F. then, an edge insulating adhesive tape is laid on a front electrode layer of the integral structure of the thin film battery corresponding to one end of the surface main grid;
G. then connecting the surface main grid with the surface main grid to connect with the output electrode, and completing the surface electrode manufacturing step;
H. then laying a primary adhesive film on the front surface at the uppermost surface, and sending the completed structure into hot-pressing or laminating equipment for pre-packaging process, so that the electrode, the primary adhesive film on the front surface and the film battery form an integral structure;
I. then applying a pulling force in the longitudinal direction through the edge of the primary pre-packaging adhesive film on the integral structure of the film battery, and separating the film battery from the substrate by adopting a defect stripping method, wherein the film battery is glued on the packaging adhesive film;
J. then the back of the thin film battery stripped by adopting a defect stripping method is subjected to secondary back electrode preparation by adopting a PVD (physical vapor deposition) or CVD (chemical vapor deposition) method, so that the back electrode is complemented and perfected due to the falling off and loss of the back electrode in the stripping process to form a complete back electrode structure, and then the ultra-soft thin film integral photovoltaic cell structure is formed;
K. arranging and connecting battery units on a back film of the assembly, wherein the non-substrate ultra-flexible film battery units are connected with the back electrode of the next flexible battery through a front electrode output electrode, and repeatedly and correspondingly connected according to the design or adopting the front electrode output electrodes of different flexible battery units to be connected according to the design so as to form a front electrode output electrode, and the back electrodes of different flexible battery units are connected to form a back electrode output electrode;
and L, connecting a set back electrode shell of a flexible battery with an output positive electrode of the assembly, connecting a front electrode output electrode with an output negative electrode of the assembly, laying a front film and a light receiving surface of the assembly at the uppermost layer, and sending the completed combination into packaging equipment for packaging to finally form the ultra-flexible film photovoltaic product and the assembly.
Preferably, the preparation method of the front surface primary adhesive film is divided into two modes: the first way is: directly preparing a primary adhesive film on the electrode on the surface of the battery, and then carrying out hot pressing or pre-packaging; the second mode is as follows: after the design of the electrode and the insulation structure is finished on the primary adhesive film, the electrode and the insulation structure are laid on the surface of the front electrode of the battery, and then hot pressing or pre-packaging is carried out.
Compared with the prior art, the invention has the beneficial effects that: the invention adopts a new battery structure and an implementation process method aiming at an ultra-soft film battery to finish the packaging manufacture of the ultra-soft photovoltaic battery and the component, and can realize the whole component product according to the designed battery structure and process.
The technology can be mainly used for inorganic compound thin film batteries, the required equipment on the conventional product preparation process flow does not need large variation, the process control window is wider, the semiconductor type precise machining process flow and equipment are not needed, the cost is greatly reduced, the subsequent large-scale popularization and application are convenient, and more importantly, the technology realizes the manufacturing and production of the thin film photovoltaic battery product without a substrate structure and ultra-soft photovoltaic. The product prepared by the process flow is a substrate-free photovoltaic cell, the flexibility is greatly improved, and the truly soft application requirement can be met. The technology can be easily imported into the actual industrialized application process.
Drawings
FIG. 1 is a schematic view of a cross-sectional structure of a thin film battery of the present invention after being covered with a film;
FIG. 2 is a schematic view of a laminated rear side cross-sectional structure of the present invention;
FIG. 3 is a schematic side view of a thin film battery of the present invention after being peeled from a substrate;
FIG. 4 is a schematic top view of the thin film battery of the present invention after being peeled from the substrate;
FIG. 5 is a schematic side view of a thin film battery after the back electrode of the present invention is fabricated;
FIG. 6 is a schematic side sectional view of a non-substrate thin film battery cell of the present invention;
FIG. 7 is a schematic diagram of a cross-sectional side view of a connection of a non-substrate thin film battery cell according to the present invention;
FIG. 8 is a schematic side view in cross-section of an ultra-soft thin film battery assembly of the present invention;
FIG. 9 is a schematic side view of a separator according to the present invention;
FIG. 10 is a schematic top view of a separator according to the present invention;
FIG. 11 is a schematic side sectional view of a thin film battery of the present invention;
FIG. 12 is a schematic diagram of the process flow for preparing an ultra-soft thin film battery according to the present invention;
fig. 13 is a schematic diagram of another process for preparing an ultra-soft thin film battery according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms first and second and the like in the description and in the claims of embodiments of the invention, are used for distinguishing between different objects and not necessarily for describing a particular sequential order of objects. For example, the first parameter set and the second parameter set, etc., are used to distinguish between different parameter sets, and are not used to describe a particular order of parameter sets.
In the description of the embodiments of the present invention, unless otherwise indicated, the meaning of "a plurality" means two or more. For example, a plurality of elements refers to two elements or more than two elements.
The term "and/or" herein is an association relationship describing an associated object, and means that there may be three relationships, for example, a display panel and/or a backlight, and may mean: there are three cases where the display panel alone exists, the display panel and the backlight exist at the same time, and the backlight exists alone. The symbol "/" herein indicates that the associated object is or is a relationship, e.g., input/output indicates input or output.
In embodiments of the invention, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
Referring to fig. 1-13, the present invention provides the following technical solutions: the utility model provides an ultra-soft film battery assembly structure, battery assembly structure includes substrate 1, high sodium molybdenum layer 2, function molybdenum layer 3, photoelectric conversion layer 4, window functional layer 5 and front electrode layer 6, high sodium molybdenum layer 2 sets up in substrate 1 surface, function molybdenum layer 3 sets up in high sodium molybdenum layer 2 surface, photoelectric conversion layer 4 sets up in function molybdenum layer 3 surface, window functional layer 5 sets up in photoelectric conversion layer 4 surface, front electrode layer 6 sets up in window functional layer 5 surface, substrate 1, high sodium molybdenum layer 2, function molybdenum layer 3, photoelectric conversion layer 4, window functional layer 5 and front electrode layer 6 stack in proper order after forming film battery complete structure 21, still include surface main grid 7 and surface fine grid 9, surface main grid 7 and surface fine grid 9 interval set up in film battery complete structure 21's front electrode layer 6 surface.
In the invention, an edge insulating adhesive tape 10 is laid on a front electrode layer 6 of a film battery complete structure 21 corresponding to one end of a surface main grid 7, the width of the edge insulating adhesive tape 10 is 0.1-50 mm, and the surface main grid 7 is connected with a surface main grid connection output electrode 8.
In the invention, a secondary back electrode 12 is arranged on the back of the film battery complete structure 21, and the high-sodium molybdenum layer 2, the functional molybdenum layer 3, the photoelectric conversion layer 4, the window functional layer 5, the front electrode layer 6 and the secondary back electrode 12 form an integral photovoltaic cell 13.
In the invention, the secondary back electrode 12 is connected with the component output positive electrode 14, and the main grid is connected with the output electrode 8 and is connected with the component output negative electrode 15.
In the invention, the back of the integral photovoltaic cell 13 is also provided with a module back film 17, and the front of the integral photovoltaic cell 13 is provided with a module front film 18 and a light receiving surface 16.
In the invention, an output connection insulation area structure 19 is arranged at the edge insulation adhesive tape 10, and a lower insulation adhesive film 20 is arranged at the end part of the surface main grid 7 near the lower end surface of the output connection insulation area structure 19.
Working principle: the preparation method of the invention comprises the following steps:
A. after cleaning and preparing the substrate 1 material, preparing a high-sodium molybdenum layer 2 on the substrate 1 by adopting PVD or a related process method;
B. preparing a molybdenum back electrode, namely a functional molybdenum layer 3, on the high-sodium molybdenum layer 2 by adopting a PVD (physical vapor deposition) or a related process method, and then preparing a photoelectric conversion layer 4 on the whole finished molybdenum back electrode by adopting a sputtering re-selenization or co-evaporation method or an ECD (electron cyclotron resonance) or RTP (rapid thermal transport protocol) method to finish the preparation of a light absorption layer;
C. after the preparation of the photoelectric conversion layer 4 is completed, a PVD or CVD technology method is adopted to prepare a window functional layer 5, and the window functional layer can be a multilayer composite film structure or a single-layer film structure according to the requirements of interface and energy band matching and the like according to different battery technology routes and types;
D. preparing a front electrode layer 6 on the window functional layer 5 by adopting a PVD or CVD mode, and completing the whole structure 21 of the thin film battery after the process steps are completed;
E. preparing a surface fine grid line 9 and a surface main grid line 7 on the front electrode layer 6 of the film battery complete structure 21 by printing or attaching a metal wire;
F. then, laying an edge insulating adhesive tape 10 on the front electrode layer 6 of the film battery complete structure 21 corresponding to one end of the surface main grid 7;
G. then connecting a surface main grid with an output electrode 8 on the surface main grid 7 to finish the surface electrode manufacturing step;
H. then laying a primary adhesive film 11 on the front surface at the uppermost surface, and sending the completed structure into hot-pressing or laminating equipment for pre-packaging process, so that the electrode, the primary adhesive film 11 on the front surface and the film battery integrated structure 21 form an integrated structure;
I. then applying a pulling force in the longitudinal direction through the edge of the primary pre-packaging adhesive film on the integral structure 21 of the film battery, and separating the film battery from the substrate by adopting a defect stripping method, wherein the film battery is glued on the packaging adhesive film;
J. then the back of the thin film battery stripped by adopting the defect stripping method is subjected to secondary back electrode 12 preparation by adopting a PVD or CVD method, so as to supplement and perfect the stripping and loss of the back electrode in the stripping process, thereby forming a complete back electrode structure, and then forming an ultra-soft thin film integral photovoltaic cell 13 structure;
K. the battery units are arranged and connected on the back film 17 of the assembly, the non-substrate ultra-flexible film battery units are connected with the back electrode 12 of the next flexible battery through the front electrode output electrode 8, and the front electrode output electrodes 8 of different flexible battery units are repeatedly connected according to the design or connected according to the design to form the front electrode output electrode, and the back electrodes 12 of different flexible battery units are connected to form the back electrode output electrode;
and L, connecting a shell of the set one flexible battery back electrode 12 with the assembly output anode 14, connecting the front electrode output electrode 8 to form an assembly output cathode 15, laying an assembly front film 18 and a light receiving surface 16 on the uppermost surface, and sending the completed combination into packaging equipment for packaging to finally form the ultra-flexible film photovoltaic product and assembly.
The preparation method of the front surface primary adhesive film is divided into two modes: the first way is: directly preparing a primary adhesive film on the electrode on the surface of the battery, and then carrying out hot pressing or pre-packaging; the second mode is as follows: after the design of the electrode and the insulation structure is finished on the primary adhesive film, the electrode and the insulation structure are laid on the surface of the front electrode of the battery, and then hot pressing or pre-packaging is carried out.
In addition, the process method for obtaining the flexible film integral photovoltaic cell 13 by using the defect peeling method can also adopt the process shown in fig. 13, the process is the same as the process flow in fig. 12 in the process of preparing the film cell integral structure 21, after the preparation of the film cell integral structure 21 is completed, the surface electrode packaging film is prepared as shown in fig. 9 and 10, the preparation of the surface fine grid 9 and the surface main grid 7 is completed on the front surface primary adhesive film 11 by printing or silk thread hot pressing and the like, the lower insulating adhesive film 20 is laid in the output connection insulating area structure 19, and the surface main grid in the output connection insulating area structure 19 is positioned between the primary adhesive film 11 and the lower insulating adhesive film 20, so that the extension part of the surface main grid 7 can be used as the main grid to connect the output electrode 8. After the preparation of the surface electrode packaging film is completed, the surface electrode packaging film grid line electrode surface is laid on the front electrode surface of the thin film battery integral structure 21, and the completed structure is sent to hot pressing or laminating equipment for pre-packaging technology, so that the electrode, the front surface primary adhesive film 11 and the thin film battery integral structure 21 form an integral structure. And then, pulling force is applied in the longitudinal direction through the edge of the primary pre-packaging adhesive film on the integral structure 21 of the film battery, the adhesive force between the molybdenum layer and the substrate and between the absorption layer and the molybdenum layer is poor due to the existence of high sodium content and the integral process, and the integral film battery can be separated along the interface with poor adhesive force due to the existence of the longitudinal pulling force, namely, the separation between the film battery and the substrate is realized by the defect stripping method described by the patent, the film battery is glued on the packaging adhesive film, then, the stripped back surface of the film battery is subjected to the preparation of the secondary back electrode 12 by a PVD (physical vapor deposition) or CVD (chemical vapor deposition) method for supplementing and perfecting the falling off and loss of the back electrode in the stripping process, so that a complete back electrode structure is formed, and then, the ultra-flexible film integral photovoltaic cell 13 structure is formed, and the ultra-flexible film integral photovoltaic cell 13 enters the subsequent product connecting process for preparing related products.
After the preparation of the substrate-free ultra-soft film battery is finished by using a defect stripping method, the preparation steps of an ultra-soft film battery component and a product are carried out:
the preparation process of the super-flexible thin-film battery is similar to the whole process flow step according to the technical route and the variety of the thin-film battery, and the preparation of the substrate-free super-flexible thin-film battery and the product can be realized by adopting the similar method.
In addition, the defect stripping method also has different defect modes adopted in the preparation of the defect layers according to different technical routes and types of the film battery, but the adopted defect ideas are the same, and the purpose and the ideas are that the adhesion force between the film layers is reduced through the interface or defect regulation and control between the film layers, so that the two layers of films are conveniently stripped, and the defect stripping method is further used for designing the ideas of stripping the films at the top of the subsequent film battery in a high-adhesion structure. The stripped film forms a complete back electrode structure in the preparation period of the secondary back electrode, so that the electrical performance is convenient to improve and stabilize.
According to the different battery structure and technical route products, the back electrode and the front electrode only represent the front and the back of the preparation, and correspond to different positive and negative electrodes according to different battery routes and materials.
In summary, the invention adopts a new battery structure and implementation process method for the ultra-soft thin film battery to finish the packaging manufacture of the ultra-soft photovoltaic battery and the component, and the whole component product can be realized according to the designed battery structure and process. The technology can be mainly used for inorganic compound thin film batteries, the required equipment on the conventional product preparation process flow does not need large variation, the process control window is wider, the semiconductor type precise machining process flow and equipment are not needed, the cost is greatly reduced, the subsequent large-scale popularization and application are convenient, and more importantly, the technology realizes the manufacturing and production of the thin film photovoltaic battery product without a substrate structure and ultra-soft photovoltaic. The product prepared by the process flow is a substrate-free photovoltaic cell, the flexibility is greatly improved, and the truly soft application requirement can be met. The technology can be easily imported into the actual industrialized application process.
While the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present invention and the scope of the appended claims, which are to be protected by the present invention; it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. A preparation method of an ultra-soft thin film battery component structure is characterized by comprising the following steps: the preparation method comprises the following steps:
A. after cleaning preparation work is carried out on the material of the substrate (1), preparing a high-sodium molybdenum layer (2) on the substrate (1) by adopting PVD;
B. preparing a molybdenum back electrode, namely a functional molybdenum layer (3), on the high-sodium molybdenum layer (2) by adopting PVD, and then preparing a photoelectric conversion layer (4) on the whole finished molybdenum back electrode by adopting a sputtering re-selenization or co-evaporation method or an ECD or RTP method;
C. preparing a window functional layer (5) on the photoelectric conversion layer (4) by adopting a PVD or CVD technical method after the photoelectric conversion layer is prepared, wherein the window functional layer is of a multi-layer composite film structure or a single-layer film structure;
D. preparing a front electrode layer (6) on the window functional layer (5) in a PVD or CVD mode, and completing the whole structure (21) of the thin film battery after the process steps are completed;
E. preparing a surface fine grid (9) and a surface main grid (7) on a front electrode layer (6) of a film battery complete structure (21) by printing or attaching a metal wire;
F. then, an edge insulating adhesive tape (10) is laid on a front electrode layer (6) of a film battery complete structure (21) corresponding to one end of a surface main grid (7);
G. then connecting a surface main grid (7) with a surface main grid connecting output electrode (8) to finish the surface electrode manufacturing step;
H. then laying a primary adhesive film (11) on the front surface at the uppermost surface, and sending the completed structure into hot-pressing or laminating equipment for pre-packaging process, so that the electrode, the primary adhesive film (11) on the front surface and the film battery complete structure (21) form an integrated structure;
I. then applying a pulling force in the longitudinal direction through the edge of the primary pre-packaging adhesive film on the integral structure (21) of the film battery, and separating the film battery from the substrate by adopting a defect stripping method, wherein the film battery is glued on the packaging adhesive film;
J. then the back of the film battery stripped by adopting the defect stripping method is subjected to secondary back electrode (12) preparation by adopting a PVD or CVD method, so as to supplement and perfect the stripping and loss of the back electrode in the stripping process, thereby forming a complete back electrode structure, and then forming an ultra-soft film integral photovoltaic battery (13);
K. the battery units are arranged and connected on the back film (17) of the assembly, the non-substrate ultra-flexible film integral photovoltaic cell (13) is connected with the back electrode (12) of the next flexible battery through the front electrode output electrode (8), and the front electrode output electrodes (8) of different flexible battery units are repeatedly connected according to the design or connected according to the design to form a front electrode output electrode, and the back electrodes (12) of different flexible battery units are connected to form a back electrode output electrode;
and L, connecting a shell of a set one-section flexible battery back electrode (12) with an assembly output positive electrode (14), connecting a front electrode output electrode (8) to form an assembly output negative electrode (15), laying an assembly front film (18) and a light receiving surface (16) on the uppermost surface, and sending the completed combination into packaging equipment for packaging to finally form the ultra-flexible film photovoltaic product and the assembly.
2. The method for manufacturing an ultra-flexible thin film battery assembly structure according to claim 1, wherein: the preparation method of the front surface primary adhesive film is any one of two modes: the first way is: directly preparing a primary adhesive film on the electrode on the surface of the battery, and then carrying out hot pressing or pre-packaging; the second mode is as follows: after the design of the electrode and the insulation structure is finished on the primary adhesive film, the electrode and the insulation structure are laid on the surface of the front electrode of the battery, and then hot pressing or pre-packaging is carried out.
3. An ultra-flexible thin film battery assembly structure prepared by the method of preparing an ultra-flexible thin film battery assembly structure according to claim 1 or 2, characterized in that: the battery assembly structure comprises a substrate (1), a high-sodium molybdenum layer (2), a functional molybdenum layer (3), a photoelectric conversion layer (4), a window functional layer (5) and a front electrode layer (6), wherein the high-sodium molybdenum layer (2) is arranged on the surface of the substrate (1), the functional molybdenum layer (3) is arranged on the surface of the high-sodium molybdenum layer (2), the photoelectric conversion layer (4) is arranged on the surface of the functional molybdenum layer (3), the window functional layer (5) is arranged on the surface of the photoelectric conversion layer (4), the front electrode layer (6) is arranged on the surface of the window functional layer (5), and the substrate (1), the high-sodium molybdenum layer (2), the functional molybdenum layer (3), the photoelectric conversion layer (4), the window functional layer (5) and the front electrode layer (6) are sequentially overlapped to form a film battery complete structure (21), and the battery assembly structure further comprises a surface main grid (7) and a surface fine grid (9), and the surface main grid (7) and the surface fine grid (9) are arranged on the surface of the front electrode layer (6) of the film battery complete structure (21) at intervals.
4. An ultra-flexible thin film battery assembly structure according to claim 3, wherein: an edge insulating adhesive tape (10) is laid on a front electrode layer (6) of a film battery complete structure (21) corresponding to one end of the surface main grid (7), the width of the edge insulating adhesive tape (10) is 0.1-50 mm, and the surface main grid (7) is connected with the surface main grid connection output electrode (8).
5. An ultra-flexible thin film battery assembly structure according to claim 3, wherein: the back of the film battery complete structure (21) is provided with a secondary back electrode (12), and the super-soft film integral photovoltaic cell (13) is formed by the high-sodium molybdenum layer (2), the functional molybdenum layer (3), the photoelectric conversion layer (4), the window functional layer (5), the front electrode layer (6) and the secondary back electrode (12).
6. An ultra-flexible thin film battery assembly structure according to claim 5, wherein: the secondary back electrode (12) is connected with an assembly output positive electrode (14), and the main grid is connected with an output electrode (8) and is connected with an assembly output negative electrode (15).
7. An ultra-flexible thin film battery assembly structure according to claim 5, wherein: the back of the ultra-soft film integral photovoltaic cell (13) is also provided with a component back film (17), and the front of the ultra-soft film integral photovoltaic cell (13) is provided with a component front film (18) and a light receiving surface (16).
8. An ultra-flexible thin film battery assembly structure according to claim 5, wherein: an output connection insulation area structure (19) is arranged at the position of the edge insulation adhesive tape (10), and a lower insulation adhesive film (20) is arranged at the end part of the surface main grid (7) close to the lower end surface of the position of the output connection insulation area structure (19).
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