Book/Dissertation / PhD Thesis

FZJ-2018-03444

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Sonochemical Synthesis of Silicon Hydride Polymers and Silicon Nanoparticles from Liquid Silanes

Cadiz Bedini, A. P. (Corresponding author)FZJ*

2018
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich
ISBN: 978-3-95806-329-7

Please use a persistent id in citations: http://hdl.handle.net/2128/18890  urn:nbn:de:0001-2018061518

Abstract: The present thesis is concerned with the use of ultrasound for the treatment of liquid silanes with the objective of fabricating solution-processable inks containing silicon hydride polymers and silicon nanoparticles. Also demonstrated is the subsequent use of the inks to deposit semiconducting hydrogenated amorphous silicon(a-Si:H) thin films and for fabricating passivation layers and thin-film photovoltaicdevices.The sonochemical effects of ultrasound on two lower silanes, namely cyclopentasilane(Si5H10) and trisilane (Si3H8) were studied. The processing of the silanes wascarried out in the inert N2-atmosphere and in solution using cyclooctane (C8H16)as solvent at ambient pressure, and at temperatures between -15–70 $^{\circ}$C. Using cyclopentasilane as monomer molecule it was shown via size exclusion chromatography and optical transmission measurements that sonication of 8–15 wt% solutions results in ring-opening polymerization without the need to use ultraviolet light. In addition, through comparisons to purely thermally treated solutions it was demonstrated that the polymerization process is not initiated pyrolytically due to the “macroscopic” temperature of the solution itself, but rather that microscopic effects associated with acoustic cavitation are most likely responsible for triggering polymer growth. [...]

Note: RWTH Aachen, Diss., 2018

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Contributing Institute(s):

1. Photovoltaik (IEK-5)

Research Program(s):

1. 121 - Solar cells of the next generation (POF3-121) (POF3-121)

Appears in the scientific report 2018

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