CN103022228A - Technology for manufacturing metal back electrode of high-efficiency solar battery by flocky structure etching technology - Google Patents
Technology for manufacturing metal back electrode of high-efficiency solar battery by flocky structure etching technology Download PDFInfo
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- CN103022228A CN103022228A CN2011102825861A CN201110282586A CN103022228A CN 103022228 A CN103022228 A CN 103022228A CN 2011102825861 A CN2011102825861 A CN 2011102825861A CN 201110282586 A CN201110282586 A CN 201110282586A CN 103022228 A CN103022228 A CN 103022228A
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- back electrode
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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 a technology for manufacturing a metal back electrode of a high-efficiency solar battery by a flocky structure etching technology. A concave-convex flocky structure is formed on the surface of the high-efficiency solar battery by adopting an acid and alkali aqueous solution etching mechanism theory, so that the directivity of scattering of reflected light after incident light reaches the back electrode is improved, a traveling distance of the light on an absorption layer is increased, and the power generation efficiency of the solar battery is improved. By the technology, a substrate is obtained; a metal back electrode film is plated by a sputtering method; after the metal back electrode is plated, a metal back electrode substrate is etched, so that a convex island-shaped structure is formed on the surface of the metal back electrode substrate, and the aims of enlarging the surface area of the metal back electrode, reflected light traveling angle distribution, increasing the traveling distance of the light in a solar module and greatly enhancing the effective light source of the solar battery are fulfilled.
Description
Technical field:
The present invention is a kind of directivity that can greatly increase the light scattering of incident light arrival back electrode back reflection, promote light at the travel distance of absorbed layer, improve solar energy efficient, its main purpose: adopt soda acid aqueous solution etching mechanism principle, after corroding, its film surface forms the velvet-like structure of concave-convex, increase the directivity that incident light arrives the light scattering of back electrode back reflection, promote light at the travel distance of absorbed layer, to increase solar cell power generation efficient.
Background technology
Be the solar cell that is coated with back electrode structure at the first processing procedure, because and have transparent conducting glass that texture (velvet-like) surface is arranged unlike the solar cell that is coated with first front electrode, so lack light in the structure of component internal scattering, increase light travel distance, if improve scattered power, need to install scattering device additional before the battery light inlet, cost is quite high.If effectively improve this shortcoming, just can greatly promote whole efficiency.
Summary of the invention
The present invention adopts soda acid aqueous solution etching mechanism principle, makes its surface form the velvet-like structure of concave-convex, increases the directivity that incident light arrives the light scattering of back electrode back reflection, promotes light at the travel distance of absorbed layer, to increase solar cell power generation efficient.Obtain first a substrate, utilize method for sputtering to be coated with the metal back electrode film.After being coated with metal back electrode, its metal back electrode substrate is carried out etch processes, make its surface form the island structure of convex, its purpose is to increase the surface area of silver metal back electrode, travel angle distributes after promoting the light reflection, increase light in the expert footpath of solar components distance, greatly promote the solar cell efficient light sources.
Specific implementation method:I is with the present invention's accompanying drawing of arranging in pairs or groups, be described in detail as follows: the schematic diagram that Fig. 1 is coated with for the velvet-like structure back electrode of this present invention concave-convex, by learning among the figure, obtain at the beginning a substrate (1), put it in the sputter vacuum cavity, at first be coated with high conductive film metal back electrode, afterwards its metal back electrode substrate is inserted and corrode film surface (3) in the etching bath, this behavior makes its glass film surface form the island structure of convex, has produced many extra surface areas.
Fig. 2 is the light course figure of the velvet-like structure back electrode of concave-convex of the present invention, when light runs into back electrode reflex time (2), and when not passing through the velvet-like structure of concave-convex (4), a scattering angle narrow distribution of advancing; With respect to light during via the velvet-like structure of the concave-convex of rete (5), owing to increase the light contact surface area, greatly promote the light scattering angular distribution, can improve light and be travel distance in the assembly, effectively increase the utilance of incident light, promote solar energy industry and advance to strive ability.
More than explanation is just illustrative, nonrestrictive for the purpose of the present invention; those of ordinary skills understand; in the situation that does not break away from the spirit and scope that claim limits, can make many corrections, variation or equivalence, but all will fall within protection scope of the present invention.
Description of drawings: following for the present invention is further described by reference to the accompanying drawings, Fig. 1 is the schematic diagram that the velvet-like structure back electrode of concave-convex of the present invention is coated with.Fig. 2 is the schematic diagram of the light course of the velvet-like structure back electrode of concave-convex of the present invention.
The main symbol description of icon:1 ... substrate 2 ... metallic reflector 3 ... the velvet-like structure 4 of concave-convex ... the walk course 5 of the velvet-like structure dorsum electrode layer of non-concave-convex of light ... the course of the velvet-like structure dorsum electrode layer of light walking concave-convex of the present invention.
Claims (3)
1. the present invention adopts soda acid aqueous solution etching mechanism principle, make its surface form the velvet-like structure of concave-convex, increase the directivity that incident light arrives the light scattering of back electrode back reflection, promote light at the travel distance of absorbed layer, to increase solar cell power generation efficient, obtain first a substrate, utilize method for sputtering to be coated with the metal back electrode film, after being coated with metal back electrode, its metal back electrode substrate is carried out etch processes, make its surface form the island structure of convex, its purpose is to increase the surface area of silver metal back electrode, travel angle distributes after promoting the light reflection, increases light in the expert footpath of solar components distance, greatly promotes the solar cell efficient light sources.
2. the velvet-like structure technology of a kind of etching according to claim 1 method of making high-effect solar cell metal back electrode in being coated with process, only needs metal film layer is plated, and modulation desired thickness and high conductivity get final product.
3. the method for making high-effect solar cell metal back electrode according to the velvet-like structure technology of a kind of etching claimed in claim 1, after being coated with metallic film back of the body electric shock, afterwards its metal back electrode substrate is inserted and corrode film surface in the etching bath, according to the back electrode material that you adopted, and select different acid-base solutions to make etch process, all belong to the present invention's claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102825861A CN103022228A (en) | 2011-09-22 | 2011-09-22 | Technology for manufacturing metal back electrode of high-efficiency solar battery by flocky structure etching technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102825861A CN103022228A (en) | 2011-09-22 | 2011-09-22 | Technology for manufacturing metal back electrode of high-efficiency solar battery by flocky structure etching technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103022228A true CN103022228A (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102825861A Pending CN103022228A (en) | 2011-09-22 | 2011-09-22 | Technology for manufacturing metal back electrode of high-efficiency solar battery by flocky structure etching technology |
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| CN (1) | CN103022228A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036705A (en) * | 2018-06-21 | 2018-12-18 | 浙江浙能技术研究院有限公司 | A method of three dimensional thin film electrode is made using fixed abrasive |
| CN109638087A (en) * | 2018-10-31 | 2019-04-16 | 北京铂阳顶荣光伏科技有限公司 | Improve the method and photovoltaic cell of photovoltaic cell back electrode and absorbed layer adhesive force |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5244509A (en) * | 1990-08-09 | 1993-09-14 | Canon Kabushiki Kaisha | Substrate having an uneven surface for solar cell and a solar cell provided with said substrate |
| JP2001015780A (en) * | 1999-06-29 | 2001-01-19 | Kanegafuchi Chem Ind Co Ltd | Rear surface electrode for silicon-system thin-film photoelectric conversion device and silicon-system thin- film photoelectric conversion device provided therewith |
| CN1507075A (en) * | 2002-12-10 | 2004-06-23 | 北京力诺桑普光伏高科技有限公司 | Surface structure of monocrystalline silicon solar cell and its making process |
-
2011
- 2011-09-22 CN CN2011102825861A patent/CN103022228A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5244509A (en) * | 1990-08-09 | 1993-09-14 | Canon Kabushiki Kaisha | Substrate having an uneven surface for solar cell and a solar cell provided with said substrate |
| JP2001015780A (en) * | 1999-06-29 | 2001-01-19 | Kanegafuchi Chem Ind Co Ltd | Rear surface electrode for silicon-system thin-film photoelectric conversion device and silicon-system thin- film photoelectric conversion device provided therewith |
| CN1507075A (en) * | 2002-12-10 | 2004-06-23 | 北京力诺桑普光伏高科技有限公司 | Surface structure of monocrystalline silicon solar cell and its making process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036705A (en) * | 2018-06-21 | 2018-12-18 | 浙江浙能技术研究院有限公司 | A method of three dimensional thin film electrode is made using fixed abrasive |
| CN109638087A (en) * | 2018-10-31 | 2019-04-16 | 北京铂阳顶荣光伏科技有限公司 | Improve the method and photovoltaic cell of photovoltaic cell back electrode and absorbed layer adhesive force |
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Application publication date: 20130403 |