EP2449578A1 - Kristalline siliciumschicht auf einem substrat, verfahren zu deren herstellung und verwendung - Google Patents
Kristalline siliciumschicht auf einem substrat, verfahren zu deren herstellung und verwendungInfo
- Publication number
- EP2449578A1 EP2449578A1 EP10732651A EP10732651A EP2449578A1 EP 2449578 A1 EP2449578 A1 EP 2449578A1 EP 10732651 A EP10732651 A EP 10732651A EP 10732651 A EP10732651 A EP 10732651A EP 2449578 A1 EP2449578 A1 EP 2449578A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- silicon layer
- substrate
- layer
- crystalline silicon
- heating
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/38—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials characterised by treatments done after the formation of the materials
- H10P14/3802—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth
- H10P14/3806—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth using crystallisation-enhancing elements
-
- 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
- H10F71/00—Manufacture or treatment of devices covered by this subclass
- H10F71/131—Recrystallisation; Crystallization of amorphous or microcrystalline semiconductors
-
- 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
- H10F77/10—Semiconductor bodies
- H10F77/12—Active materials
- H10F77/122—Active materials comprising only Group IV materials
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/34—Deposited materials, e.g. layers
- H10P14/3402—Deposited materials, e.g. layers characterised by the chemical composition
- H10P14/3404—Deposited materials, e.g. layers characterised by the chemical composition being Group IVA materials
- H10P14/3411—Silicon, silicon germanium or germanium
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/38—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials characterised by treatments done after the formation of the materials
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/01—Manufacture or treatment
-
- 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
-
- 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
Definitions
- Crystalline silicon layer on a substrate process for its preparation and use
- the invention relates to a method for producing a crystalline silicon layer on a substrate, in which a deposition of a metal layer on a substrate and subsequent deposition of a silicon layer on the metal layer takes place. Subsequently, a zone-controlled heating of the silicon layer is carried out and finally the metal layer is removed. According to the invention, the crystalline silicon layer thus prepared is also provided.
- the method according to the invention for producing sensors, silicon-based light-emitting diodes, flat-panel displays or optical filters is used.
- the metal-induced layer exchange process (often carried out with aluminum, hence called aluminum-induced layer exchange ALILE) is a well-known and used phenomenon by which amorphous silicon layers can be transferred into microcrystalline ones. So far, this is done by a homogeneous heating and cooling of the substrate with layer. The result is spontaneous, relatively poorly controlled nucleation in the layer, and thus a very small-crystalline grain distribution with crystal sizes in the micron range.
- ALILE aluminum-induced layer exchange process
- Recrystallization of the layer is ensured.
- the process described there is used in particular in the production of crystalline silicon thin-film solar cells or in SOI technology. Based on this, it was an object of the present invention to provide a method that has lower process times compared to the prior art and can be generated with the crystalline silicon layers with larger crystals.
- a method for producing a crystalline silicon layer on a substrate which is based on the following process steps: a) deposition of a metal layer on one
- the advantages of the method according to the invention in comparison to the methods known from the prior art are based on the one hand on the better control of the crystal size and on the other on a significant reduction of the process time.
- the advantages compared to known methods can increase the efficiency potential of the solar cell processed from the layers and at the same time increase the throughput rate of the process.
- the metal layer is made of a metal selected from the group consisting of aluminum, nickel, palladium, copper and silver. It is also possible that the metal layer contains one of the aforementioned metals. Particularly preferably, the metal layer consists of aluminum.
- an amorphous or microcrystalline silicon layer which is optionally doped or partially alloyed, is preferably deposited.
- Suitable dopants are boron, phosphorus, arsenic, gallium and antimony.
- germanium is suitable for alloy formation.
- An essential process step is the zone-guided heating of the silicon layer. The heating is preferably carried out in a zone heating furnace.
- heat sources are used which are preferably selected from the group consisting of electron beam heaters, laser beam sources, graphite strip heaters, halogen lamp heaters, IR emitters and UV emitters.
- the heat sources are additionally provided with focusing mirrors. This serves to better localize the heat radiation.
- a relative movement preferably takes place from substrate to heat source.
- This can be realized, for example, by using a stationary substrate while the heat source is movable.
- Another variant provides that the heat source is stationary and the substrate is moved.
- both the heat source and the substrate are movable and are shifted from one another.
- step d) is preferably carried out by wet-chemical etching, plasma etching
- the exposed silicon layer is epitaxially thickened. This is preferably done by chemical vapor deposition at atmospheric or low pressure, molecular beam epitaxy, laser assisted recrystallization, solid state recrystallization, and ion beam assisted coating. According to the invention is also a crystalline
- Silicon layer which can be produced by the method described above.
- the crystalline silicon layer preferably has elongated crystal structures in the transport direction. Under elongated crystal structures is here to understand that the spatial extent of the crystallites in the transport direction is greater than perpendicular to it. Ideally, the electronic diffusion length of the minority charge carriers in the layer is greater than the layer thickness itself.
- the process according to the invention is used in particular in the field of photovoltaics. Likewise, however, the method can also be used for the production of sensors, silicon-based light-emitting diodes, flat-panel displays or optical filters.
- the process flow is shown with reference to a schematic representation.
- a substrate 1 On a substrate 1, an aluminum layer with a layer thickness of less than 1 ⁇ m is first applied.
- On the aluminum layer 2 is also less than 1 micron thick amorphous or microcrystalline
Landscapes
- Recrystallisation Techniques (AREA)
- Photovoltaic Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009031357A DE102009031357A1 (de) | 2009-07-01 | 2009-07-01 | Kristalline Siliciumschicht auf einem Substrat, Verfahren zu deren Herstellung und Verwendung |
| PCT/EP2010/003931 WO2011000544A1 (de) | 2009-07-01 | 2010-06-29 | Kristalline siliciumschicht auf einem substrat, verfahren zu deren herstellung und verwendung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2449578A1 true EP2449578A1 (de) | 2012-05-09 |
Family
ID=42688677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10732651A Withdrawn EP2449578A1 (de) | 2009-07-01 | 2010-06-29 | Kristalline siliciumschicht auf einem substrat, verfahren zu deren herstellung und verwendung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2449578A1 (de) |
| DE (1) | DE102009031357A1 (de) |
| WO (1) | WO2011000544A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002951838A0 (en) * | 2002-10-08 | 2002-10-24 | Unisearch Limited | Method of preparation for polycrystalline semiconductor films |
| EP1605499A3 (de) * | 2004-06-07 | 2009-12-02 | Imec | Verfahren zur Herstellung einer kristallinen Siliziumschicht |
| DE102005043303B4 (de) | 2005-09-12 | 2010-07-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur Rekristallisierung von Schichtstrukturen mittels Zonenschmelzen und dessen Verwendung |
| WO2009018472A1 (en) * | 2007-07-31 | 2009-02-05 | The Regents Of The University Of California | Low-temperature formation of polycrystalline semiconductor films via enhanced metal-induced crystallization |
-
2009
- 2009-07-01 DE DE102009031357A patent/DE102009031357A1/de not_active Withdrawn
-
2010
- 2010-06-29 EP EP10732651A patent/EP2449578A1/de not_active Withdrawn
- 2010-06-29 WO PCT/EP2010/003931 patent/WO2011000544A1/de not_active Ceased
Non-Patent Citations (4)
| Title |
|---|
| "Chapter 11 - Aluminum Thin Films & Physical Vapor Deposition in ULSI ED - Wolf Stanley; Tauber Richard N", 1 January 2000, SILICON PROCESSING FOR THE VLSI ERA. VOL. 1: PROCESS TECHNOLOGY, LATTICE PRESS, PAGE(S) 434 - 487, ISBN: 978-0-9616721-6-4, XP009142073 * |
| FIEBIG M ED - BASTING D ET AL: "16.2 TFT Annealing", 1 January 2005, EXCIMER LASER TECHNOLOGY, SPRINGER, PAGE(S) 306 - 312, ISBN: 3-540-20056-8, XP009182808 * |
| NAST O: "The aluminiuminduced layer exchange forming polycrystalline silicon on glass for thin-film solar cells", THE ALUMINIUMINDUCED LAYER EXCHANGE FORMING POLYCRYSTALLINE SILICON ON GLASS FOR THIN-FILM SOLAR CELLS, PHILIPPS-UNIVERSITÄT MARBURG, 1 January 2000 (2000-01-01), pages 1 - 129, XP009164298 * |
| See also references of WO2011000544A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009031357A1 (de) | 2011-01-05 |
| WO2011000544A1 (de) | 2011-01-06 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20120131 |
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| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
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| DAX | Request for extension of the european patent (deleted) | ||
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: REBER, STEFAN Inventor name: JANZ, STEFAN Inventor name: LINDEKUGEL, STEFAN |
|
| 17Q | First examination report despatched |
Effective date: 20121108 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAN Owner name: ALBERT-LUDWIGS-UNIVERSITAET FREIBURG |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20150721 |