Original title: Materiály pro sluneční články založené na tenkých vrstvách křemíku
Translated title: Materials for Solar Cells Based on Thin Silicon Films
Authors: Fekete, Ladislav
Document type: Rigorous theses
Year: 2006
Language: cze
Abstract: Thin lm microcrystalline silicon is the most promising materiál for large area PN junction solar cells. As microcrystalline silicon is a heterogenous material composed of two phases (amorphous silicon tissue from which crystalline grains of micrometric dimension grow). The Raman spectra are commonly used to determine the crystallinity of mixed phase silicon thin lms by analyzing the contributions of amorphous and crystalline phase to TO phonon band. Many dierent empirical or semi-empirical methods of evaluating crystallinity from the Raman spectra exist. In this master's thesis the microcrystalline Raman spectra were studied and a better way of evaluating crystallinity was searched for. The decomposition of the microcrystalline spectra of the series of the samples, where a single deposition parameter was changing,by tting them with Gaussian bands was performed. We also report on the development of a special software for the band decomposition by non-linear least-squares tting based on Marquardt-Levenberg algorithm and demonstrate its use for a series of lms with structure changing from amorphous to fully microcrystalline.

Institution: Charles University Faculties (theses) (web)
Document availability information: Available in the Charles University Digital Repository.
Original record: http://hdl.handle.net/20.500.11956/4853

Permalink: http://www.nusl.cz/ntk/nusl-268564


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Universities and colleges > Public universities > Charles University > Charles University Faculties (theses)
Academic theses (ETDs) > Rigorous theses