EP1987548A1 - Halbleiterbauelement und verfahren zu dessen herstellung sowie dessen verwendung - Google Patents
Halbleiterbauelement und verfahren zu dessen herstellung sowie dessen verwendungInfo
- Publication number
- EP1987548A1 EP1987548A1 EP07711548A EP07711548A EP1987548A1 EP 1987548 A1 EP1987548 A1 EP 1987548A1 EP 07711548 A EP07711548 A EP 07711548A EP 07711548 A EP07711548 A EP 07711548A EP 1987548 A1 EP1987548 A1 EP 1987548A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- silicon
- layer
- semiconductor component
- masking layer
- aluminum
- 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- Withdrawn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
- 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
- H10F77/40—Optical elements or arrangements
- H10F77/42—Optical elements or arrangements directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means
-
- 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
- H10F77/40—Optical elements or arrangements
- H10F77/42—Optical elements or arrangements directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means
- H10F77/48—Back surface reflectors [BSR]
-
- 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
- Y02E10/52—PV systems with concentrators
Definitions
- the invention relates to a semiconductor component of a silicon wafer having at least one optically mirrored surface, in which by applying the method according to the invention in a simple way mirroring can be produced with a high reflection value.
- the efficiency of solar cells it is crucial, on the one hand to increase the efficiency, on the other hand to reduce the thickness of the wafer.
- the development of the back of the solar cell is crucial, since particularly high demands are placed on optical and electrical properties.
- the optics the highest possible internal reflectivity is sought, so that light which has penetrated from the front into the wafer and has not yet been absorbed is applied to the cell surface. can be reflected back and so is a new way to absorb the light in the silicon.
- the electrical properties can be achieved particularly well by using a dielectric passivation layer.
- dielectric passivation layers which are usually made of silicon oxide, have a refractive index that is very different from that of silicon, which provides advantages in the internal reflection of the light in the solar cell.
- the internal reflectivity is then further increased by an additionally deposited metallic layer, usually of aluminum.
- a method for producing a semiconductor component with at least one optically mirrored surface is provided. This method is based on the fact that a silicon wafer having on at least one of its surfaces at least partially an etchable dielectric layer, with a marking layer of amorphous silicon or a silicon-containing layer having a silicon content of at least 60 wt .-% for shielding against fluidic media is provided, wherein the masking layer is deposited on the dielectric layer. An aluminum layer is then deposited on the masking layer. In a further step, then a thermal treatment of the layer system, wherein there is a dissolution of the silicon in the aluminum.
- an efficient masking of selected areas against the grip fluidic etching media such as by hydrofluoric acid allows. This is because amorphous silicon or silicon-rich layers have high resistance to hydrofluoric acid.
- the masking layer consists of amorphous silicon, which has a particularly high resistance to hydrofluoric acid.
- a further preferred variant provides that the masking layer consists of silicon nitride.
- the silicon content is preferably at least 60% by weight, particularly preferably at least 70% by weight.
- the deposition of the masking layer it is possible to use all methods known from the prior art, plasma-enhanced chemical vapor deposition being preferred.
- amorphous silicon preference is given to using silane (SiH 4 ) and optionally hydrogen (H 2 ) as starting materials.
- the vapor deposition is preferably carried out at a pressure of 20 to 280 Pa, in particular 30 to 75 Pa.
- the temperature is preferably in the range of 20 to 400 0 C, in particular 200 to 300 0 C.
- the deposition of the masking layer can also be effected by means of sputtering.
- a material selected from the group consisting of silicon oxide, silicon nitride, silicon carbide and aluminum oxide is preferably used for the passivation layer.
- a thermal treatment is carried out at temperatures in the range of preferably 150 to 950 0 C and more preferably from 300 to 550 0 C. The temperature selection is determined over the time window, so that a short thermal treatment at a higher temperature to the same Result as a longer treatment at low temperature leads. This described temperature treatment leads to a dissolution process of the silicon in the aluminum.
- the resulting layer of aluminum and silicon has very high reflectance values.
- the masking layer after the masking layer has been deposited, it can be patterned by means of laser ablation so that the masking layer can be used as a local etching mask.
- a semiconductor component made of a silicon wafer with at least one optically mirrored surface is likewise provided.
- the silicon wafer has a dielectric passivation layer on the at least one optically mirrored surface.
- the semiconductor components according to the invention have comparably high reflection values compared with the systems known from the prior art from a wafer with a silicon oxide layer deposited thereon.
- the semiconductor components according to the invention preferably have a reflection value in the range of> 90 % on. This simultaneously leads to an efficiency of the solar cell according to the invention of at least 18%.
- the semiconductor device according to the invention has been produced by the method described above.
- the process according to the invention is used in particular in the production of solar cells.
- the FIGURE shows a reflection measurement on a semiconductor component according to the invention, with a silicon wafer (250 ⁇ m thickness), a passivation layer of silicon oxide (100 nm thickness), a masking layer of amorphous silicon (50 nm thickness) and an aluminum layer (2 ⁇ m thickness). This is contrasted with reflection measurements on a system known from the prior art which has no masking layer.
- a layer with a much lower refractive index than that of silicon was preferably silicon oxide, for example produced by thermal oxidation or deposited by known coating methods.
- thermal oxides which were produced in the tube furnace at temperatures between 800 and 1050 0 C by heating the wafer in an oxygen-containing atmosphere.
- Deposed Oxi were prepared from nitrous oxide (N 2 O) and silane (SiH 4 ) in plasma assisted chemical vapor deposition in a parallel plate reactor.
- the refractive index of the dielectric layer was n ⁇ 1.45 (measured at 630 nm and RT).
- silicon oxide aluminum was vapor-deposited and a good mirror was formed.
- the amorphous silicon was then dissolved by thermal treatment in the aluminum layer.
- the amorphous silicon was produced from silane (SiH 4 ) and hydrogen (H 2 ) by plasma enhanced chemical vapor deposition (PECVD) in a pressure range of 30 to 75 Pa at temperatures of 200 to 300 0 C.
- the radiation output emerging again on the front side of the semiconductor component according to the invention was measured and set in relation to the radiated power, resulting in the reflection value.
- the reflectance value before the thermal treatment at 1200 nm is about 75%.
- the silicon dissolves in the aluminum and the reflection rises above 90%, as is the case even without the amorphous silicon in this layer system (see figure).
Landscapes
- Photovoltaic Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006007797A DE102006007797B4 (de) | 2006-02-20 | 2006-02-20 | Verfahren zur Herstellung eines Halbleiterbauelements sowie dessen Verwendung |
| PCT/EP2007/001325 WO2007096084A1 (de) | 2006-02-20 | 2007-02-15 | Halbleiterbauelement und verfahren zu dessen herstellung sowie dessen verwendung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1987548A1 true EP1987548A1 (de) | 2008-11-05 |
Family
ID=38051789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07711548A Withdrawn EP1987548A1 (de) | 2006-02-20 | 2007-02-15 | Halbleiterbauelement und verfahren zu dessen herstellung sowie dessen verwendung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20090032095A1 (de) |
| EP (1) | EP1987548A1 (de) |
| JP (1) | JP2009527895A (de) |
| KR (1) | KR20080095252A (de) |
| DE (1) | DE102006007797B4 (de) |
| WO (1) | WO2007096084A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8378280B2 (en) * | 2007-06-06 | 2013-02-19 | Areva Solar, Inc. | Integrated solar energy receiver-storage unit |
| EP2331792A2 (de) | 2007-06-06 | 2011-06-15 | Areva Solar, Inc | Kombikraftwerk |
| US20090126364A1 (en) * | 2007-06-06 | 2009-05-21 | Ausra, Inc. | Convective/radiative cooling of condenser coolant |
| US20090056703A1 (en) * | 2007-08-27 | 2009-03-05 | Ausra, Inc. | Linear fresnel solar arrays and components therefor |
| US9022020B2 (en) | 2007-08-27 | 2015-05-05 | Areva Solar, Inc. | Linear Fresnel solar arrays and drives therefor |
| US20090250108A1 (en) * | 2008-04-02 | 2009-10-08 | Applied Materials, Inc. | Silicon carbide for crystalline silicon solar cell surface passivation |
| CA2759708C (en) * | 2009-04-21 | 2019-06-18 | Tetrasun, Inc. | High-efficiency solar cell structures and methods of manufacture |
| US9673341B2 (en) | 2015-05-08 | 2017-06-06 | Tetrasun, Inc. | Photovoltaic devices with fine-line metallization and methods for manufacture |
| US12326631B2 (en) * | 2020-12-23 | 2025-06-10 | Intel Corporation | Display with a distributed nano light emitting diode backlight |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3413157A (en) * | 1965-10-21 | 1968-11-26 | Ibm | Solid state epitaxial growth of silicon by migration from a silicon-aluminum alloy deposit |
| US4927770A (en) * | 1988-11-14 | 1990-05-22 | Electric Power Research Inst. Corp. Of District Of Columbia | Method of fabricating back surface point contact solar cells |
| JP2706113B2 (ja) * | 1988-11-25 | 1998-01-28 | 工業技術院長 | 光電変換素子 |
| JP3193287B2 (ja) * | 1996-02-28 | 2001-07-30 | シャープ株式会社 | 太陽電池 |
| US6552414B1 (en) * | 1996-12-24 | 2003-04-22 | Imec Vzw | Semiconductor device with selectively diffused regions |
| AUPO638997A0 (en) * | 1997-04-23 | 1997-05-22 | Unisearch Limited | Metal contact scheme using selective silicon growth |
| US6423568B1 (en) * | 1999-12-30 | 2002-07-23 | Sunpower Corporation | Method of fabricating a silicon solar cell |
| JP2003533053A (ja) * | 2000-05-05 | 2003-11-05 | ユニサーチ リミテツド | 光起電力素子のための低領域金属接点 |
| JP4171428B2 (ja) * | 2003-03-20 | 2008-10-22 | 三洋電機株式会社 | 光起電力装置 |
| US7649141B2 (en) * | 2003-06-30 | 2010-01-19 | Advent Solar, Inc. | Emitter wrap-through back contact solar cells on thin silicon wafers |
-
2006
- 2006-02-20 DE DE102006007797A patent/DE102006007797B4/de not_active Expired - Fee Related
-
2007
- 2007-02-15 US US12/162,755 patent/US20090032095A1/en not_active Abandoned
- 2007-02-15 KR KR1020087020286A patent/KR20080095252A/ko not_active Withdrawn
- 2007-02-15 WO PCT/EP2007/001325 patent/WO2007096084A1/de not_active Ceased
- 2007-02-15 EP EP07711548A patent/EP1987548A1/de not_active Withdrawn
- 2007-02-15 JP JP2008554680A patent/JP2009527895A/ja active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007096084A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007096084A1 (de) | 2007-08-30 |
| US20090032095A1 (en) | 2009-02-05 |
| JP2009527895A (ja) | 2009-07-30 |
| KR20080095252A (ko) | 2008-10-28 |
| DE102006007797A1 (de) | 2007-09-13 |
| DE102006007797B4 (de) | 2008-01-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2007096084A1 (de) | Halbleiterbauelement und verfahren zu dessen herstellung sowie dessen verwendung | |
| WO2010081505A2 (de) | Solarzelle und verfahren zur herstellung einer solarzelle aus einem siliziumsubstrat | |
| WO2006114321A1 (de) | Entspiegelungsschicht und verfahren zu deren aufbringung | |
| DE102010060339A1 (de) | Solarzelle und Solarzellenherstellungsverfahren | |
| EP2314732B2 (de) | Verfahren zur Beschichtung eines Substrats mit einer TCO-Schicht und Dünnschichtsolarzelle | |
| DE102010054370A1 (de) | Verfahren zur Herstellung von Siliziumsolarzellen mit vorderseitiger Textur und glatter Rückseitenoberfläche | |
| EP2970698B1 (de) | Beschichtung, verfahren zu deren herstellung und ihre verwendung | |
| DE112009001642T5 (de) | Dünnschichtsolarzelle und Verfahren zu deren Herstellung | |
| DE202011003479U1 (de) | Strukturierte Siliziumschicht für ein optoelektronisches Bauelement und optoelektronisches Bauelement | |
| DE102010025983A1 (de) | Solarzelle mit dielektrischer Rückseitenverspiegelung und Verfahren zu deren Herstellung | |
| DE2538300B2 (de) | Verfahren zur herstellung einer solarabsorberschicht | |
| EP3050125A1 (de) | Photovoltaische solarzelle und verfahren zum herstellen einer metallischen kontaktierung einer photovoltaischen solarzelle | |
| EP1993142A1 (de) | Reflektiv beschichtetes Halbleiterbauelement, Verfahren zu dessen Herstellung sowie dessen Verwendung | |
| WO2019243298A1 (de) | Monofazial-solarzelle, solarmodul und herstellungsverfahren für eine monofazial-solarzelle | |
| DE102019122451B4 (de) | Verfahren zur Herstellung einer porösen Siliziumoxidschicht | |
| WO2010022889A1 (de) | Verfahren zur lokalen kontaktierung und lokalen dotierung einer halbleiterschicht | |
| EP3830621B1 (de) | Optisch-elektrische leiteranordnung mit lichtwellenleiter und elektrischer leitschicht | |
| DE102011054427A1 (de) | Verfahren zur Herstellung eines optischen Elements und optisches Element | |
| EP1754690B1 (de) | Verglasungselement und Verfahren zu dessen Herstellung | |
| EP2653896A1 (de) | Verfahren zur Herstellung eines thermisch belastbaren Reflektors | |
| DE102010049976B4 (de) | Solarzelle mit texturierter Elektrodenschicht und Verfahren zur Herstellung einer solchen | |
| DE102010030301A1 (de) | Substrat mit oberflächlich strukturierter Flächenelektrode | |
| EP3190354B1 (de) | Mehrschichtmaterialfolge zur energiegewinnung aus sonnenlicht, deren herstellung sowie deren verwendung | |
| DE102014012201A1 (de) | Bauteil zur solaren Energiegewinnung mit veränderlichem Emissionsgrad | |
| DE2734544A1 (de) | Strahlungsenergie-wandler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |
|
| 17P | Request for examination filed |
Effective date: 20080729 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HOFMANN, MARC Inventor name: SCHULTZ, OLIVER |
|
| 17Q | First examination report despatched |
Effective date: 20090210 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HOFMANN, MARC Inventor name: SCHULTZ-WITTMANN, OLIVER |
|
| DAX | Request for extension of the european patent (deleted) | ||
| 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 |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20150901 |