Ebook: Presentation of the Electrical Molten Zone (EMZ) Technique

This article presents a new zone melting crystallization technique for photovoltaic silicon ribbon
production. It starts by showing some background research on related methods concerning, in
particular, to ways of achieving and moving electrical molten zones (EMZ). It presents the
fundamental mechanism responsible for the electric current concentration, which allows zone
formation. Demonstrates the possibility of zone melting recrystallization (ZMR) through this
technique and shows growth rates and energy consumptions that can be expected of it. It exposes
ideas and results of the first attempts to obtain silicon ribbons using commercial (granular)
feedstock. The electrical characteristics and control methods of the system are shown as well as the
related temperature distributions in the ribbons. It reveals the existence of interfacial instability
phenomena, which is thought to be of magnetohydrodynamic (MHD) origin, thus (tentative)
explanations for those are illustrated by analogy with typical occurrences observed (in other
contexts) in tubes of electrically conducting fluids.