WO2009135819A2 - Verfahren zur herstellung einer monokristallinen solarzelle - Google Patents
Verfahren zur herstellung einer monokristallinen solarzelle Download PDFInfo
- Publication number
- WO2009135819A2 WO2009135819A2 PCT/EP2009/055372 EP2009055372W WO2009135819A2 WO 2009135819 A2 WO2009135819 A2 WO 2009135819A2 EP 2009055372 W EP2009055372 W EP 2009055372W WO 2009135819 A2 WO2009135819 A2 WO 2009135819A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- thick
- busbars
- cell
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/20—Electrodes
- H10F77/206—Electrodes for devices having potential barriers
- H10F77/211—Electrodes for devices having potential barriers for photovoltaic cells
- H10F77/215—Geometries of grid contacts
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/20—Electrodes
- H10F77/206—Electrodes for devices having potential barriers
- H10F77/211—Electrodes for devices having potential barriers for photovoltaic cells
-
- 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
-
- 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
- Y02E10/547—Monocrystalline silicon PV cells
Definitions
- the invention relates to a method for producing a monocrystalline solar cell with a passivated back and a
- Such a backside metallization usually consists of large-area printed, aluminum-based thick-film paste, which is alloyed with the sintering above 800 ° by forming the low-melting AISi eutectic and recrystallization to the semiconductor surface and thereby the existing n-doping due to a previously made phosphorus diffusion to p + -Dot réelle overcompensated.
- solder-bonding contacts on the back are necessary for module integration of cells, it is necessary to previously apply silver-based paste printing, which typically reproduces the number and location of front-side busbars on the back side.
- silver-based paste printing typically reproduces the number and location of front-side busbars on the back side.
- FIG. 1 Such a cell of the prior art is shown in the schematic diagram of FIG. 1 shown.
- the backside bus bars are printed in strip-shaped areas below the front side bus bars before the final alumino paste pressure fills the remaining areas on the side of the busbars, with aluminum and silver slightly overlapping along the edges of each silver strip.
- the back contact structure formed in this case is found in many variants
- LFC contacts laser fired contacts
- a major disadvantage of the method of laser-driven contacting is that the large number of necessary local contacts must be made sequentially and therefore in the highest possible number per second and high light intensity.
- damage to the silicon surface often occurs under the local contacts, which manifests itself in particular in an increased surface recombination speed and thus a reduced passivation effect.
- the object of the invention is achieved by teaching according to the sequence of steps according to claim 1. Accordingly, the method according to the invention relates to a process step sequence for the production of local contacts of a metal layer through a full-area passivation layer of a cell backside on the semiconductor surface, wherein inventive thin film production is combined with the production of a thick film by screen printing or stencil printing.
- inventive thin film production is combined with the production of a thick film by screen printing or stencil printing.
- PERC structure Passivated Emitter and Rear Cell
- the passivation layer which at the same time constitutes electrical insulation, can be formed from a material which is most suitable in each case and with the respectively most suitable technology. Likewise, this passivation layer can be opened locally with such a technology, which has the least interaction with the other components.
- the passivation layer in turn, is covered with a most suitable technology, in particular thin-film technology, with a most suitable metallization, in particular aluminum, while at the same time covering the local contact areas on the semiconductor surface with the large isolated areas.
- the preparation of the local BSF areas of recrystallizing AISi in the local contact areas is combined with the sintering of a thick-film paste, in particular a silver paste, which is applied in advance to the local contacts and the external contact areas by printing.
- a thick-film paste in particular a silver paste
- the melting of the AISi eutectic is used, via its reaction with the conductive paste, in particular silver paste, which leads to the formation of intermetallic phases of the Ag-Al system, a permanent low-resistance connection of the thin-layer metallization on the passivation layer with the localized BSF Layer in the semiconductor.
- the cell back side is homogeneously coated, to form an unstructured, thin metal layer, which in the passivation layer-free areas of the surface of the substrate material, d. H. touches the semiconductor surface.
- the thick-film is then sintered at a temperature above a predetermined eutectic temperature and the formation of a eutectic, low-resistance compound of the thin metal layer with the surface of the substrate material and with the conductive particles of the thick-film paste.
- the aforementioned passivation layer may be made of a silicon oxide, alumina or the like material.
- the thin film is preferably produced by sputtering or vapor deposition of an aluminum material.
- the necessary on the front strip conductors and busbars can be produced by thick-film screen printing or stencil printing.
- Both thick films, d. H. the thick layer on the front and thick layers on the back can be sintered during a common heat treatment.
- pastes are selected which are preferably in a temperature range above the Al-Si eutectic of 577 ° C, but below the aluminum melting point of 660 0 C, so preferably between 580 0 C and 620 0 C are sinterable.
- Fig. IA is a plan view of a three-busbar standard cell
- FIG. 1B shows a cross section through a standard cell according to FIG. IA
- Fig. IA and IB show the top view and a cross-sectional view of a three-busbar standard cell of a p-type silicon wafer 1 with busbars on the front side 4 and backside busbars 3 and an aluminum paste pressure filling the remaining areas 2 on the side of the busbars, with aluminum and silver along the Slightly overlap edges of each silver strip (see cross section of Fig. IB).
- a deposition of a dielectric passivation layer 8 for.
- a dielectric passivation layer 8 for.
- silica on the back by z.
- thermal oxidation LPCVD, PECVD, sputtering or the like made.
- the front side has a front side texture 5 and an antireflection layer 7.
- the starting material 1 is a p-type silicon wafer with n + + emitter 6.
- a thermal oxidation took place in the first step for producing the passivation layer, additional care must be taken to etch the oxide on the front side.
- a local removal of the passivation layer 8 takes place on the rear side in the region of the busbars and at all local via-points or via-points 9, e.g. By laser ablation, etching paste printing or plasma etching.
- a homogeneous coating of the rear side with a conductive material, in particular an aluminum-containing thin layer 10, is carried out by vapor deposition or sputtering.
- step according to FIG. 2D is a screen printing of the tracks and busbars on the front z. B. with the aid of a conductive paste, in particular with silver paste 11th
- screen printing also involves the application of via points 12 and of the busbars 13 on the back side of the cell, specifically using silver paste material.
- a last process step according to FIG. 2E is carried out sintering of all the screen printing pastes, ie formed paths on the front side and the via dots 12 and bus bars 13 on the rear side in the temperature range between 580 0 C and 620 0 C. This is due to the sintering temperature above the eutectic temperature of 577 ° C, a low melting AISi eutectic 14 in the contact surfaces between the silicon and the aluminum layer. At the same time, the silver particles of the silver paste alloy with the liquid aluminum-silicon eutectic, because the aluminum-silver eutectic temperature of 566 ° C. is also exceeded during sintering.
- MWT cells metal wrap-through
- emitter fingers are arranged on the front side and emitter busbars are located on the rear side, as well as emitter fingers and emitter busbars via metallized, laser or similarly drilled holes are in electrical connection
Landscapes
- Photovoltaic Devices (AREA)
Abstract
Description
Claims
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT09742037T ATE550787T1 (de) | 2008-05-07 | 2009-05-05 | Verfahren zur herstellung einer monokristallinen solarzelle |
| JP2011507883A JP5238072B2 (ja) | 2008-05-07 | 2009-05-05 | 単結晶太陽電池セルの製造方法 |
| KR1020107027345A KR101484355B1 (ko) | 2008-05-07 | 2009-05-05 | 단결정 태양 전지의 제조 방법 |
| ES09742037T ES2381176T3 (es) | 2008-05-07 | 2009-05-05 | Método para producir una celda solar monocristalina |
| US12/990,962 US20110120552A1 (en) | 2008-05-07 | 2009-05-05 | Method for producing a monocrystalline solar cell |
| CN2009801163408A CN102067322B (zh) | 2008-05-07 | 2009-05-05 | 一种单晶太阳能电池的制造方法 |
| EP09742037A EP2289109B1 (de) | 2008-05-07 | 2009-05-05 | Verfahren zur herstellung einer monokristallinen solarzelle |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008022574 | 2008-05-07 | ||
| DE102008022574.6 | 2008-05-07 | ||
| DE102008033169.4 | 2008-07-15 | ||
| DE102008033169A DE102008033169A1 (de) | 2008-05-07 | 2008-07-15 | Verfahren zur Herstellung einer monokristallinen Solarzelle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2009135819A2 true WO2009135819A2 (de) | 2009-11-12 |
| WO2009135819A3 WO2009135819A3 (de) | 2010-11-18 |
Family
ID=41152801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2009/055372 Ceased WO2009135819A2 (de) | 2008-05-07 | 2009-05-05 | Verfahren zur herstellung einer monokristallinen solarzelle |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20110120552A1 (de) |
| EP (1) | EP2289109B1 (de) |
| JP (1) | JP5238072B2 (de) |
| KR (1) | KR101484355B1 (de) |
| CN (1) | CN102067322B (de) |
| AT (1) | ATE550787T1 (de) |
| DE (1) | DE102008033169A1 (de) |
| ES (1) | ES2381176T3 (de) |
| WO (1) | WO2009135819A2 (de) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2504843A1 (de) * | 2009-11-25 | 2012-10-03 | E.I. Du Pont De Nemours And Company | Verfahren zur herstellung einer silberrückelektrode eines passivierten emitters und rückkontakt-siliziumsolarzelle |
| DE102010028189B4 (de) | 2010-04-26 | 2018-09-27 | Solarworld Industries Gmbh | Solarzelle |
| EP2398071B1 (de) * | 2010-06-17 | 2013-01-16 | Imec | Verfahren zum Bilden eines dotierten Bereichs in einer Halbleiterschicht eines Substrats und Verwendung des Verfahrens |
| US20130061918A1 (en) * | 2011-03-03 | 2013-03-14 | E. I. Dupont De Nemours And Company | Process for the formation of a silver back electrode of a passivated emitter and rear contact silicon solar cell |
| DE102011052256B4 (de) * | 2011-07-28 | 2015-04-16 | Hanwha Q.CELLS GmbH | Verfahren zur Herstellung einer Solarzelle |
| DE102011055143A1 (de) * | 2011-11-08 | 2013-05-08 | Hanwha Q.CELLS GmbH | Beidseitig kontaktierte Halbleiterwafer-Solarzelle mit oberflächenpassivierter Rückseite |
| WO2014084795A1 (en) * | 2012-11-30 | 2014-06-05 | Trina Solar Energy Development Pte Ltd | Selectively doped layer for interdigitated back-contact solar cells and method of fabricating the same |
| CN104037242B (zh) * | 2013-03-06 | 2016-03-16 | 中美硅晶制品股份有限公司 | 光伏元件及其制造方法 |
| WO2015085534A1 (en) * | 2013-12-12 | 2015-06-18 | Ablestik (Shanghai) Limited | Electrically conductive inks |
| DE102013111748A1 (de) * | 2013-10-24 | 2015-04-30 | Hanwha Q Cells Gmbh | Solarmodul und Solarmodulherstellungsverfahren |
| US9178104B2 (en) | 2013-12-20 | 2015-11-03 | Sunpower Corporation | Single-step metal bond and contact formation for solar cells |
| WO2015172823A1 (en) * | 2014-05-14 | 2015-11-19 | Applied Materials Italia S.R.L. | Solar cell device and method for producing a solar cell device |
| KR101569417B1 (ko) | 2014-07-07 | 2015-11-16 | 엘지전자 주식회사 | 태양 전지 |
| WO2018062158A1 (ja) * | 2016-09-28 | 2018-04-05 | 京セラ株式会社 | 太陽電池素子 |
| US11472373B2 (en) * | 2017-04-17 | 2022-10-18 | 3E Nano Inc. | Energy control coatings, structures, devices, and methods of fabrication thereof |
| CN111559142A (zh) * | 2020-05-22 | 2020-08-21 | 天津耀皮汽车玻璃有限公司 | 一种带有镂空膜层的镀膜加热玻璃 |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03502627A (ja) * | 1988-06-10 | 1991-06-13 | エイエスイー・アメリカス・インコーポレーテッド | 太陽電池用接点製作の改良された方法 |
| JPH0690014A (ja) * | 1992-07-22 | 1994-03-29 | Mitsubishi Electric Corp | 薄型太陽電池及びその製造方法,エッチング方法及び自動エッチング装置,並びに半導体装置の製造方法 |
| JP3625081B2 (ja) * | 1994-11-25 | 2005-03-02 | 株式会社村田製作所 | 太陽電池の製造方法 |
| JP4468494B2 (ja) * | 1998-03-26 | 2010-05-26 | 信越化学工業株式会社 | 太陽電池及び太陽電池の製造方法 |
| JP2002083983A (ja) * | 2000-09-08 | 2002-03-22 | Shin Etsu Handotai Co Ltd | 太陽電池セルの製造方法およびこの方法で製造された太陽電池セル |
| JP2002246625A (ja) * | 2001-02-21 | 2002-08-30 | Sharp Corp | 太陽電池の製造方法 |
| JP2002270869A (ja) * | 2001-03-12 | 2002-09-20 | Shin Etsu Handotai Co Ltd | 太陽電池 |
| JP2004006565A (ja) * | 2002-04-16 | 2004-01-08 | Sharp Corp | 太陽電池とその製造方法 |
| US7388147B2 (en) | 2003-04-10 | 2008-06-17 | Sunpower Corporation | Metal contact structure for solar cell and method of manufacture |
| JP4155899B2 (ja) | 2003-09-24 | 2008-09-24 | 三洋電機株式会社 | 光起電力素子の製造方法 |
| JP2005150609A (ja) * | 2003-11-19 | 2005-06-09 | Sharp Corp | 太陽電池の製造方法 |
| US20060060238A1 (en) | 2004-02-05 | 2006-03-23 | Advent Solar, Inc. | Process and fabrication methods for emitter wrap through back contact solar cells |
| JP3926822B2 (ja) * | 2005-02-03 | 2007-06-06 | 三菱電機株式会社 | 半導体装置及び半導体装置の製造方法 |
| EP1763086A1 (de) * | 2005-09-09 | 2007-03-14 | Interuniversitair Micro-Elektronica Centrum | Solarzellen mit dickem Siliziumoxid und Siliziumnitrid zur Passivierung und entsprechendes Herstellungsverfahren |
| JP2007214372A (ja) * | 2006-02-09 | 2007-08-23 | Sharp Corp | 太陽電池およびその製造方法 |
| NO20061668L (no) * | 2006-04-12 | 2007-10-15 | Renewable Energy Corp | Solcelle og fremgangsmate for fremstilling av samme |
| DE102006041424A1 (de) * | 2006-09-04 | 2008-03-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur simultanen Dotierung und Oxidation von Halbleitersubstraten und dessen Verwendung |
| US7820540B2 (en) * | 2007-12-21 | 2010-10-26 | Palo Alto Research Center Incorporated | Metallization contact structures and methods for forming multiple-layer electrode structures for silicon solar cells |
-
2008
- 2008-07-15 DE DE102008033169A patent/DE102008033169A1/de not_active Withdrawn
-
2009
- 2009-05-05 KR KR1020107027345A patent/KR101484355B1/ko not_active Expired - Fee Related
- 2009-05-05 JP JP2011507883A patent/JP5238072B2/ja not_active Expired - Fee Related
- 2009-05-05 ES ES09742037T patent/ES2381176T3/es active Active
- 2009-05-05 US US12/990,962 patent/US20110120552A1/en not_active Abandoned
- 2009-05-05 AT AT09742037T patent/ATE550787T1/de active
- 2009-05-05 CN CN2009801163408A patent/CN102067322B/zh not_active Expired - Fee Related
- 2009-05-05 WO PCT/EP2009/055372 patent/WO2009135819A2/de not_active Ceased
- 2009-05-05 EP EP09742037A patent/EP2289109B1/de not_active Not-in-force
Also Published As
| Publication number | Publication date |
|---|---|
| JP5238072B2 (ja) | 2013-07-17 |
| CN102067322B (zh) | 2013-03-27 |
| ES2381176T3 (es) | 2012-05-23 |
| EP2289109A2 (de) | 2011-03-02 |
| ATE550787T1 (de) | 2012-04-15 |
| WO2009135819A3 (de) | 2010-11-18 |
| US20110120552A1 (en) | 2011-05-26 |
| KR20110005898A (ko) | 2011-01-19 |
| KR101484355B1 (ko) | 2015-01-20 |
| DE102008033169A1 (de) | 2009-11-12 |
| EP2289109B1 (de) | 2012-03-21 |
| JP2011520277A (ja) | 2011-07-14 |
| CN102067322A (zh) | 2011-05-18 |
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