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Title:
 
Thermo-Mechanical Aspects of the Co-Firing Process in Multi-Crystalline Silicon Solar Cells
 
Author(s):
 
R. Nabavi, J. Reinoso, E. Jansen, R. Rolfes
 
Keywords:
 
Stability, Monte Carlo, Voronoi, Crystallographic Texture
 
Topic:
 
WAFER-BASED SILICON SOLAR CELLS AND MATERIALS TECHNOLOGY
Subtopic: Silicon Solar Cell Characterisation and Modelling
Event: 28th European Photovoltaic Solar Energy Conference and Exhibition
Session: 2CV.3.32
 
Pages:
 
1576 - 1582
ISBN: 3-936338-33-7
Paper DOI: 10.4229/28thEUPVSEC2013-2CV.3.32
 
Price:
 
 
0,00 EUR
 
Document(s): paper, poster
 

Abstract/Summary:


One of the principal issues during the production of solar cells concerns the so-called co-firing process. In this procedure, the laminated structure composed of Silicon (mono-crystalline or multi-crystalline). Aluminum-paste and Silver-paste is heated up to 850°C, and afterwards is cooled down up to room temperature. As a consequence of the significant mismatch between the thermal expansion coefficients of the adjacent constituents within the laminate, a residual curvature is noticeable which gives an indication of the internal residual stress field. In order to capture this bowing behavior of the structure first a detailed review on the mechanical properties of different constituents of the silicon solar cells, with a special focus on silicon due to its anisotropic mechanical behavior, has been performed. The complex structure of multi-crystalline silicon has been produced based on the Voronoi-Tessellation algorithm. Consequently the effect of crystallographic texture on the final configuration of the solar cell after the co-firing process through Monte Carlo simulations using FEM approach has been investigated