Title | Linear Electric Molten Zone Stimulated by Laser for Silicon Ribbons Growth |
Author(s) | David M. Pera, Killian Lobato, Miguel Centeno Brito, Jorge Maia Alves, João M. Almeida Serra, Antonio Manuel Vallêra |
Keywords | Laser Processing, Silicon (Si), Simulation, Crystallisation, Crystallization, Ribbons |
Topic | Wafer-Based Silicon Solar Cells and Materials Technology |
Subtopic | Silicon Feedstock, Crystallisation and Wafering |
Event | 28th EU PVSEC |
Session | 2BV.3.32 |
Pages manuscript | 1453 - 1455 |
ISBN | 3-936338-33-7 |
DOI | 10.4229/28thEUPVSEC2013-2BV.3.32 |
An electric molten capillary in a silicon ribbon was for the first time created and maintained using laser scanning as a localized thermal stimulation to promote the electric current concentration in the desired place on the ribbon. Since this type of molten capillary can potentially be used to grow a silicon ribbon, a Computational Fluid Dynamics (CFD) model was also developed in order to explore passive cooling methods that can be used to minimize possible thermal-stresses associated to crystalline defects creation in the growing ribbon by an electric molten zone based ribbon growth technology. The experimental setup was optimized based on the CFD model results showing as result a smooth cooling gradient characterized by a low magnitude and linear thermal second derivative profile. The result validates the setup arrangement for a potential high quality crystalline silicon ribbons growth method.