Size effects in numerical homogenization of polycrystalline silicon

authored by: Martin Weber, Marcus Aßmus, Rainer Glüge, Max von Zabiensky, Holm Altenbach
Abstract: A current topic in the photovoltaic industry is the analysis and evaluation of possible structural and material properties. This requires the effective material characteristics of polycrystalline silicon, which is an important component for the functional performance of the photovoltaic modules in use. Since this assessment is associated with high costs, it is to be carried out already in the product development process. Due to very thin silicon layers, the effect of the layer thickness on the effective material characteristics has to be investigated (see ). In this work, a procedure to determine these characteristic values is listed to investigate the size effect on different film thicknesses of this material (see ). With the knowledge of the properties of the silicon single crystal with its cubic symmetry on the micro level, a homogenization of the properties to the macro level can be done. The polycrystal structure with a cubic sample geometry forms the macro level. This structure is now cut into thinning layers for investigation. The open‐source software Neper is used to create the crystal structure and the inter‐connectivity for this purpose. With the help of Matlab, this information is passed on to the finite element program Abaqus, where the results are evaluated after an elastic calculation using Python. The focus is on the expected change in material properties as a function of the layer thickness.
Organisation(s): Institute of Continuum Mechanics
External Organisation(s): Otto-von-Guericke University Magdeburg
Type: Article
Journal: PAMM
Volume: 23
ISSN: 1617-7061
Publication date: 01.11.2023
Publication status: Published
Peer reviewed: Yes
Sustainable Development Goals: SDG 7 - Affordable and Clean Energy
Electronic version(s): https://doi.org/10.1002/pamm.202300221 (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{396c0328032a41cb8c79c65ab98a71c1,
title = "Size effects in numerical homogenization of polycrystalline silicon",
abstract = "A current topic in the photovoltaic industry is the analysis and evaluation of possible structural and material properties. This requires the effective material characteristics of polycrystalline silicon, which is an important component for the functional performance of the photovoltaic modules in use. Since this assessment is associated with high costs, it is to be carried out already in the product development process. Due to very thin silicon layers, the effect of the layer thickness on the effective material characteristics has to be investigated (see ). In this work, a procedure to determine these characteristic values is listed to investigate the size effect on different film thicknesses of this material (see ). With the knowledge of the properties of the silicon single crystal with its cubic symmetry on the micro level, a homogenization of the properties to the macro level can be done. The polycrystal structure with a cubic sample geometry forms the macro level. This structure is now cut into thinning layers for investigation. The open‐source software Neper is used to create the crystal structure and the inter‐connectivity for this purpose. With the help of Matlab, this information is passed on to the finite element program Abaqus, where the results are evaluated after an elastic calculation using Python. The focus is on the expected change in material properties as a function of the layer thickness.",
author = "Martin Weber and Marcus A{\ss}mus and Rainer Gl{\"u}ge and Zabiensky, {Max von} and Holm Altenbach",
note = "Open access funding enabled and organized by Projekt DEAL.",
year = "2023",
month = nov,
day = "1",
doi = "10.1002/pamm.202300221",
language = "English",
volume = "23",
journal = "PAMM",
issn = "1617-7061",
publisher = "Wiley Online Library",
number = "3",
}