TEM analysis of nanoparticles for solar energy conversion prepared by gas cluster aggregation source
In the scope of this cumulative thesis, different nanoparticle materials that can be applied for different pathways of solar energy conversion were characterized by transmission electron microscopy. The nanoparticles were mostly fabricated by gas aggregation cluster source systems. This fabrication method offers the potential of high purity and flexibility. Next to its advantages, the particle formation process is highly complex and can be influenced by a multitude of factors. Therefore, the particle synthesis in gas aggregation cluster source systems is not well understood and its potential is only partially exploited.
The combination of results from transmission electron microscopy with complementary analytical methods revealed connections between deposition parameters and resulting particle properties. The presented studies provide insights into the relevance of the discharge voltage as deposition parameter, provide possible particle formation mechanisms of new material combinations in the gas cluster aggregation source and extend the fabrication technique by combination with secondary depositions.
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