Photonic Sintering and Structuring & Lab Demo

Abstract

Basics and manufacturing technology procedures where laser as a main tool is used will be described and summarized in this module. Physical principles of the photon interaction with semiconductors and metals as well as technical aspects of laser heated crystal growth and purification with a small floating zone will be presented in details.
Physical and technical aspects of the laser utilization in a 3D printing and additive manufacturing technology will be considered and explained. Principles and possibilities of complex object creation in submicron size by the layer-by-layer melting and by the two-photon polymerization will be presented and discussed. The traditional and modern skills on photonic sintering and structuring in Si electronic technology will be taught. Finally, the surface structuring of silicon solar cells and structuring of thin films in the organic photovoltaic technology, including structuring with ultra-short pulse lasers, will be provided in the course as well as presented in videos and treated during the practical course in the labs.

Glossary

Chapter one
Historical review of photonic sintering and structuring. Application of structuring in solar cells. Special lasers and their characteristics. Physical principles of the photon interaction with semiconductors and metals. Set-ups and their components.
Chapter two
Laser heated crystal growth and purification of materials with a miniature floating zone. Advantages and fields of application. Laser-heated floating zone production of single-crystal fibers. Nucleation and crystal growth in laser patterned lines in glasses.
Chapter three
Laser in additive manufacturing (3D printing) technology. Selective laser sintering (polymer in use). Two-photon polymerization (TPP) as a manufacturing technique for realization of micro-structured materials and creating complex objects in submicron size. Selective laser melting (metals in use) layer-by-layer approach. New design possibilities of this technique.
Chapter four
Laser beam selective doping in Si electronic technology. Doping sources and variations of the profiles. Penetration depth and process adapted temporal irradiation profiles. Laser soldering and laser welding of solar modules with strongly localized energy deposition. Traditional and new temperature control methods for the real-time soldering.
Chapter five
Laser as a manufacturing tool in the photovoltaics. Surface structuring of silicon solar cells for better light coupling. Micro-scale structuring of the surface. Creation of photonic structures. Structuring of thin films with ultra-short pulse lasers. Techniques and physical processes. Structuring of transparent conductive layers for organic electronics.

Learning Outcomes

The students will collect expertize in basic and technical aspects of photonic sintering of materials in submicro- and photonic structuring of photovoltaic devices in submicro- and nano-scale.

Bibliography

[1] Andreeta, M.R.B.; Hernandes, A.C. (2010). “Laser-Heated Pedestal Growth of Oxide Fibers”. In Dhanaraj, G.; Byrappa, K.; Prasad, V.; Dudley, M. Springer Handbook of Crystal Growth. p. 393. ISBN 978-3-540-74182-4.
[2] Schmidt M., Gausemeier J., Leyens C., Anderl R., Winzer P., Schmid HJ., Seliger G., Straube F., Kohlhuber M., Kage M., Karg M.:
Additive Manufacturing (2017), S. 1-60, URL: http://www.acatech.de/fileadmin/user_upload/Baumstruktur_nach_Website/Acatech/root/de/Publikationen/Kooperationspublikationen/3Akad_Stellungnahme_EN_AdditiveFertigung_web_FINAL.pdf
[3] New strategy for local diffusion of dopants in crystalline silicon. Easy integration into silicon solar cells production lines
See more technologies at www.upc.edu/patents/TO UPC – BarcelonaTech.
[4] Peter Kubis. Design and Development of Ultra-fast Laser Patterning Processes for the Production of Organic Photovoltaic Modules with High Geometric Fill Factor. PhD- Thesis, University of Erlangen, 2014, urn:nbn:de:bvb:29-opus4-54832.
[5] Additional bibliography will be provided in each lecture of the course.

External Evaluator

To be Announced

Responsible Academics

Prof. Christoph J. Brabec
Dr. Andres Osvet

Awarded ECTS

2.5