engleski

Incorporation of spark ablation and nanoscale 3D printing for deriving nanostructured layers

Two photon laser polymerization allows pushing the limit beyond the 100 nm benchmark and still providing a direct technique that allows the development of complex 3D structures with up to nanoscale resolution. Additional postprocessing of the printed structures by means of chemical, thermal or plasma etching further widens the possibilities to further decrease the resolution of target structures, limited only by the mechanical properties of the polymer resist used for the printing. In addition to laser printing spark ablation has recently emerged as a novel technique capable for reproducibly preparing nanoparticles with narrow size distribution. In this work we combined the aforementioned processes. Spark ablation was used to decorate the surface of the 3D printed samples with metal/metal oxide core shell nanoparticles. Samples were characterized in depth using microscopies (SEM and AFM) and mechanical testing (in situ SEM mechanical testing) before and after the incorporation of the layers in solar cells as electron transport layers.

3D nanoscale printing, spark ablation, electron transport layers, solar cells

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