EP2465175A1 - Cellule solaire - Google Patents

Cellule solaire

Info

Publication number
EP2465175A1
EP2465175A1 EP10737920A EP10737920A EP2465175A1 EP 2465175 A1 EP2465175 A1 EP 2465175A1 EP 10737920 A EP10737920 A EP 10737920A EP 10737920 A EP10737920 A EP 10737920A EP 2465175 A1 EP2465175 A1 EP 2465175A1
Authority
EP
European Patent Office
Prior art keywords
solar cell
layer
cell according
substrate
functional layer
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Withdrawn
Application number
EP10737920A
Other languages
German (de)
English (en)
Inventor
Wolfgang Volz
Gregor Kron
Tobias Mildenstein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2465175A1 publication Critical patent/EP2465175A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0224—Electrodes
    • H01L31/022466—Electrodes made of transparent conductive layers, e.g. TCO, ITO layers

Definitions

  • the invention relates to a solar cell with a planar cell substrate, which is transparent in the spectral range of visible light and at least a portion of the infrared spectral range, and a cell structure arranged on a surface thereof.
  • Photovoltaics is one of the most dynamic areas of energy technology and is gaining increasing economic importance.
  • the development of multi-faceted configurations of solar cells and their technological refinement have contributed significantly to this in recent years.
  • An essential development line relates to the provision of optimized carrier or substrate structures which have advantageous optical and thermal properties in terms of a high energy yield and are technically easy and inexpensive to implement.
  • IR radiation has z.
  • crystalline silicon from about 1100 nm, there is not enough energy to create electron-hole pairs and thus contribute to the photocurrent. Therefore, this type of radiation does not contribute positively
  • An IR-reflecting arrangement comprising a plurality of protective layers suppresses low-order reflections and thus reflects spectral bands which are beyond the short- and long-wave limits of the wavelength range that the solar cell can use for the opto-electrical conversion.
  • the structures described are flexible in their parameters adjustable, but relatively expensive to implement.
  • the invention is therefore based on the object to provide a solar cell with a simplified structure and reduced manufacturing costs, the construction nevertheless ensures adequate shielding of unusable parts of the incident sunlight.
  • the invention includes the essential idea of deliberately departing from the approach underlying EP 0 632 507 A2 to specify the simplest possible substrate structure, the production of which only few steps required. It further includes the idea of realizing for this purpose various functions which the substrate structure must realize in relation to the actual cell structure, in a meaningful way in as few as possible provided on the substrate layers. This finally results in the essential idea that only on the surface of the cell substrate carrying the cell structure is a bi-or multifunctional layer applied, which is transparent in the region of visible light and has an infrared-reflecting and a contacting function.
  • the advantage of the invention described lies in the combination of two layers, the conductive front contact and the IR reflection layer, to form a bi-functional layer.
  • This construction results in an improved optical transmission of the usable solar radiation.
  • the structure simplifies the manufacture and leads to a cost reduction, since only a coating process and a coating material is necessary.
  • a further advantage lies in the good thermal conductivity and the "inner layer" of the conductive reflection layer, which allows the solar cell to dissipate heat without radiation, otherwise the IR radiation would also reflect due to the cell temperature and thus lead to a heating of the cell This would be the case if the IR reflection layer were located on the outside, that is to say in the position of use of the sun facing side, because of the lower heat absorption due to reflected IR radiation, the efficiency of the module initially improves
  • An advantageous embodiment in the sense of the above-mentioned aim of minimizing the number of layers provides that the bi- or multifunctional layer has a high electrical conductivity.
  • she has one
  • Sheet resistance of less than 15 ⁇ / D in order to serve as the (only) front side contacting layer of the solar cell without any functional limitations.
  • a glass substrate is used as substrate in a further embodiment of the invention. Concrete glass compositions have long been established in the photovoltaic art and are useful in the practice of the present invention. With regard to the bi- or multifunctional coating essential to the invention, dyeing for filtering out IR radiation components by means of absorption can be dispensed with, ie "clear glass.”
  • substrate materials also include high-temperature-resistant transparent plastics, quartz glass, and other proven transparent support materials into consideration.
  • the bi-or multifunctional layer is provided as the only infrared-reflecting agent and as the only front-side contacting layer of the solar cell. To some extent, however, this goal is already achieved if the layer exclusively fulfills only one of these two functions, while an additional layer is provided for the complete fulfillment of the respective remaining function.
  • the bi- or multifunctional layer in the spectral range of visible light has an absorption coefficient below a threshold, in particular below 20%. Depending on the performance requirements and physical parameters of the actual solar cell, however, another value can also be specified.
  • the bi-or multifunctional layer has a reflection coefficient above a predetermined threshold value, in particular at 1100 nm and more than 50%, in a subarea of the infrared spectral range. , Has. Even with respect to these values, depending on the specific cell structure and the overall structure modifications possible and possibly useful.
  • the complex functionality of the proposed substrate coating can be achieved in an expedient and reliable manner when the bi- or multifunctional layer comprises metal particles, in particular silver particles having a mean grain size in the nanometer or micrometer range, in particular 100 nm or less.
  • metal particles in particular silver particles having a mean grain size in the nanometer or micrometer range, in particular 100 nm or less.
  • other metals are suitable, such as - depending on the other properties of the module structure - gold or copper or alloys of the metals mentioned. It is also possible to deviate from the said preferred grain size upper limit, and it may also be advantageous to use the intercalation material with a predetermined particle size distribution.
  • the single figure shows schematically in a cross-sectional representation the structure of a solar cell 1 according to the invention, with a glass substrate 1, a bifunctional (electrically conductive and IR-reflecting) layer 3 and a solar cell Abau 5, in use in this order of a symbolized by the arrow A solar radiation exposed.
  • the bifunctional layer 3, z. B. consisting of Ag nanoparticles, is in thermal contact with the glass and the actual solar cell and has a good thermal conductivity.
  • the incident IR-TeM of the solar radiation is reflected by the reflection layer and thus does not contribute to the heating of the solar cell.
  • the layer takes over the function of the front contact, wherein no additional TCO or comparable layer is necessary, which would reduce the optical transmission and thus deteriorate the efficiency of the solar cell. Due to the good conductivity, the heat of the solar cells is passed through the reflective layer into the substrate, which emits energy according to its emissivity and temperature.

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L’invention concerne une cellule solaire comportant un substrat de cellule plat qui est transparent dans le domaine spectral de la lumière visible et au moins dans une partie du domaine spectral de l’infrarouge, et une structure cellulaire disposée sur une surface dudit substrat. Une couche bifonctionnelle ou multifonctionnelle qui est transparente dans le domaine de la lumière visible et a une fonction de réflexion de la lumière infrarouge et de mise en contact est appliquée sur la surface du substrat de cellule portant la structure cellulaire.
EP10737920A 2009-08-10 2010-08-03 Cellule solaire Withdrawn EP2465175A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009028393A DE102009028393A1 (de) 2009-08-10 2009-08-10 Solarzelle
PCT/EP2010/061261 WO2011018390A1 (fr) 2009-08-10 2010-08-03 Cellule solaire

Publications (1)

Publication Number Publication Date
EP2465175A1 true EP2465175A1 (fr) 2012-06-20

Family

ID=43448020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10737920A Withdrawn EP2465175A1 (fr) 2009-08-10 2010-08-03 Cellule solaire

Country Status (5)

Country Link
US (1) US20120199197A1 (fr)
EP (1) EP2465175A1 (fr)
CN (1) CN102576741A (fr)
DE (1) DE102009028393A1 (fr)
WO (1) WO2011018390A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105977323A (zh) * 2016-07-11 2016-09-28 无锡市宝来电池有限公司 一种太阳能电池
EP3518295B1 (fr) * 2016-09-20 2021-06-23 Kaneka Corporation Matériau de construction en verre

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008001998A1 (fr) * 2006-06-29 2008-01-03 Korea Advanced Institute Of Science And Technology Procédé de fabrication d'une électrode conductrice transparente au moyen de films de nanotubes de carbone

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0758355A (ja) 1993-05-12 1995-03-03 Optical Coating Lab Inc Ｕｖ／ｉｒ反射太陽電池カバー
DE19743692A1 (de) * 1997-10-02 1999-04-08 Zae Bayern Multifunktionsschicht zur Verbesserung des Wirkungsgrades von kristallinen Dünnschicht Silizium Solarzellen
BRPI0618291A2 (pt) * 2005-11-10 2011-08-30 Univ Illinois dispositivos fotovoltaicos de conversão de luz em energia elétrica
US8012317B2 (en) * 2006-11-02 2011-09-06 Guardian Industries Corp. Front electrode including transparent conductive coating on patterned glass substrate for use in photovoltaic device and method of making same
US7888594B2 (en) * 2007-11-20 2011-02-15 Guardian Industries Corp. Photovoltaic device including front electrode having titanium oxide inclusive layer with high refractive index
FR2924863B1 (fr) * 2007-12-07 2017-06-16 Saint Gobain Perfectionnements apportes a des elements capables de collecter de la lumiere.
US20090253227A1 (en) * 2008-04-08 2009-10-08 Defries Anthony Engineered or structured coatings for light manipulation in solar cells and other materials

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008001998A1 (fr) * 2006-06-29 2008-01-03 Korea Advanced Institute Of Science And Technology Procédé de fabrication d'une électrode conductrice transparente au moyen de films de nanotubes de carbone

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2011018390A1 *

Also Published As

Publication number Publication date
US20120199197A1 (en) 2012-08-09
WO2011018390A1 (fr) 2011-02-17
WO2011018390A9 (fr) 2011-04-28
CN102576741A (zh) 2012-07-11
DE102009028393A1 (de) 2011-02-17

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