Friedrich-Alexander-Universität Erlangen-Nürnberg

Laser sintering of nanoparticles for the production of thin conducting layers on transparent substrates

Laser Sintering of Nanoparticles for The Production of Thin Conducting Layers On Transparent Substrates

The aim of this project is the generation of thin transparent and electrically conducting layers of indium tin oxide, zinc oxide and silicon on transparent substrates. In contrast to common techniques such as vapor deposition or sputtering, these layers shall be prepared from nanoparticles. Consolidation of these nanoparticle layers will be achieved by laser sintering under ambient conditions.The process of particle sintering will be examined both experimentally and theoretically. During the research the optical properties of the materials used have to be determined for the investigation of the energy input. Based on the results simulative modelling of the energy absorption and the energy dissipation during the sintering process of nanoparticles will be carried out. The results gained from the considered nanoparticle layers will be compared to existing models of heat conductance for macro sintering processes. Then the sinter stages including the initial state of the particle system as well as the changes of the particle layers during consolidation such as changes in porosity, which can be determined via wavefront measurements, will be investigated. A special focus is on the interaction of the electromagnetic field of the laser with the nanoparticle system, especially the impact of near field effects on the sintering process.

Fig.1 Laser treated ZnO particle layer on silicon.


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