CN103022225A - Method for manufacturing island-shaped growth structure back electrode - Google Patents
Method for manufacturing island-shaped growth structure back electrode Download PDFInfo
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- CN103022225A CN103022225A CN201110282420XA CN201110282420A CN103022225A CN 103022225 A CN103022225 A CN 103022225A CN 201110282420X A CN201110282420X A CN 201110282420XA CN 201110282420 A CN201110282420 A CN 201110282420A CN 103022225 A CN103022225 A CN 103022225A
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- back electrode
- silver metal
- light
- island structure
- island
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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
Abstract
The invention discloses a method for manufacturing an island-shaped growth structure back electrode. A convex island-shaped structure is formed on the surface by adopting a silver metal back electrode island-shaped structure deposition film forming 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 a solar battery is improved. By the method, a substrate is obtained; a silver metal back electrode film is plated by a sputtering method; when the temperature of the substrate is relatively high, the silver metal can be deposited to form a film in a manner of an island-shaped structure; and by the deposition characteristic, the convex island-shaped structure is formed on the surface, so that the aims of enlarging the surface area of the metal back electrode, enhancing reflected light traveling angle distribution, increasing the traveling distance of the light in a solar module and greatly enhacing the effective light source of the solar battery are fulfilled.
Description
Technical field
The present invention is a kind of directivity that can effectively 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: the mechanism principle that adopts silver metal back electrode deposition film forming, make its surface form the island structure of 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 promote whole efficiency.
Summary of the invention
The present invention mainly is the mechanism principle that adopts silver metal back electrode island structure deposition film forming, make its surface form the island structure of 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 silver metal back electrode film.When substrate temperature is higher, silver metal can deposit film forming with island structure, we can use this deposition characteristics, 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, to 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, and be described in detail as follows: Fig. 1 is the schematic diagram of island growth structure back electrode of the present invention, by learning among the figure, obtain at the beginning a substrate (1), put it in the sputter vacuum cavity, in being coated with process, its substrate temperature is promoted to 200 ℃, at this moment, silver metal is because of temperature effect, and membrane formation mechanism is transformed into the island mode and deposits (3), this behavior, make its glass film surface form the island structure of convex, produced many extra surface areas.
Fig. 2 is the light course figure of the island structure of convex of the present invention, when light runs into back electrode reflex time (2), and when crossing the island structure (4) of convex, a scattering angle narrow distribution of advancing; , owing to increase the light contact surface area, so can promote the light scattering angular distribution, improve light and be travel distance in the assembly during via the island structure (5) of the convex of rete with respect to light, 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 back electrode film of the present invention is coated with.Fig. 2 is the schematic diagram of light course of the island structure of convex of the present invention.
The main symbol description of icon.
1 ... glass
2 ... the silver metal reflector
3 ... the island structure of convex (island structure growth)
4 ... the walk course of island structure dorsum electrode layer of non-convex of light
5 ... the course of the island structure dorsum electrode layer of light walking convex of the present invention.
Claims (4)
1. the present invention mainly is the mechanism principle that adopts silver metal back electrode island structure deposition film forming, make its surface form the island structure of 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 silver metal back electrode film, when substrate temperature is higher, silver metal can deposit film forming with island structure, we can use this deposition characteristics, make its surface form the island structure of convex, its purpose is to increase the surface area of silver metal back electrode, promotes the rear travel angle of light reflection and distributes, increase light in the expert footpath of solar components distance, greatly promote the solar cell efficient light sources.
2. a kind of silver metal back electrode island structure according to claim 1 deposits the method for film forming, in being coated with process, its substrate temperature is promoted to uniform temperature (being about 200 ℃), and silver metal is because of temperature effect, and membrane formation mechanism is transformed into the island mode and deposits.
3. according to the method for a kind of silver metal back electrode island structure deposition film forming claimed in claim 1, silver metal at the beginning island structure is grown up, and namely forms the silver metal thin film back electrode of continuity convex island structure after being coated with for a long time.
4. the method for a kind of silver metal back electrode island structure deposition film forming according to claim 1, substrate need not any specific structural constraints, and the process temperatures that need only bear 200 ℃ gets final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110282420XA CN103022225A (en) | 2011-09-22 | 2011-09-22 | Method for manufacturing island-shaped growth structure back electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110282420XA CN103022225A (en) | 2011-09-22 | 2011-09-22 | Method for manufacturing island-shaped growth structure back electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103022225A true CN103022225A (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110282420XA Pending CN103022225A (en) | 2011-09-22 | 2011-09-22 | Method for manufacturing island-shaped growth structure back electrode |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101246922A (en) * | 2007-02-14 | 2008-08-20 | 北京行者多媒体科技有限公司 | Method for reinforcing optical capturing effect of thin film photovoltaic device |
| CN101488532A (en) * | 2008-01-16 | 2009-07-22 | 财团法人工业技术研究院 | Back electrode module of solar cell |
| CN101752454A (en) * | 2008-12-04 | 2010-06-23 | 上海空间电源研究所 | Preparation method of ultrathin Cu-In-Ga-Se thin film solar cell with light trap structure |
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2011
- 2011-09-22 CN CN201110282420XA patent/CN103022225A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101246922A (en) * | 2007-02-14 | 2008-08-20 | 北京行者多媒体科技有限公司 | Method for reinforcing optical capturing effect of thin film photovoltaic device |
| CN101488532A (en) * | 2008-01-16 | 2009-07-22 | 财团法人工业技术研究院 | Back electrode module of solar cell |
| CN101752454A (en) * | 2008-12-04 | 2010-06-23 | 上海空间电源研究所 | Preparation method of ultrathin Cu-In-Ga-Se thin film solar cell with light trap structure |
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Application publication date: 20130403 |