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12. August 2024

IKZ, BAM, UDE and BESTEC successfully completed KostSol project

The aim of the joint project was to reduce costs in the production of Cu(In,Ga)Se2 solar cells through laser-induced structure formation on surfaces

Indium-Array
Indium array produced through thermal decomposition of trimethylindium using laser radiation Credit: ©IKZ

The joint project "Cost-Efficient Fabrication of Cu(In,Ga)Se2 Solar Cells through Laser-Induced Surface Structuring" (KostSol), funded by the Federal Ministry of Economics and Climate Protection (BMWK), in co-operation with the Federal Institute for Materials Research and Testing (BAM), the University of Duisburg/Essen (UDE) and the industrial partner BESTEC GmbH, has been successfully completed.

The approach of using laser radiation to grow patterned crystalline structures on amorphous surfaces, thereby replacing complex masks or lithography techniques, has been successfully realized.

For this purpose, laser radiation with a specific wavelength and intensity was employed and directed through a diffractive optical element (DOE), creating a patterned thermal inhomogeneity on the target substrate.

Thermal decomposition of organometallic gases at elevated temperatures was used to selectively form liquid and, subsequently crystalline island-shaped structures on the surface. Using this method, CuInSe2 islands in the micrometer range were fabricated and processed into micro-concentrator solar cells.

For this project, a PVD-CVD cluster system (physical vapor deposition and chemical vapor deposition) with an integrated laser system has been developed and tested. The locally selective deposition of the localized structures in the micrometer range can be used for a variety of other applications, particularly in semiconductor industry.

The project partners IKZ, BAM, UDE and the company BESTEC, as well as the contractors Mergenthaler GmbH, CSE GmbH and the Fraunhofer Heinrich Hertz Institute Berlin worked closely together to realize the project.

 

Contact:

Leibniz-Institut für Kristallzüchtung (IKZ)
Dr. Setareh Zahedi-Azad
+49 30 6392-2852
setareh.zahedi-azad(at)ikz-berlin.de

Dr. Torsten Boeck
+49 30 6392-3051
torsten-boeck(at)ikz-berlin.de

   

Press release of IKZ 08.08.2024.

Research Microsystems / Materials Photonics / Optics Renewable Energies

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Related Institutions

  • Leibniz-Institut für Kristallzüchtung im Forschungsverbund Berlin e.V. (IKZ)
  • BAM Bundesanstalt für Materialforschung und -prüfung
  • BESTEC GmbH
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The development of the Science and Technology Park Berlin Adlershof was and is co-financed by the European Union namely by EFRE. This concerns infrastructure development like construction of technology centres. Furthermore EFRE is used for international projects.

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