Title :

Formation mechanism and properties of twinned structures in (111) seeded directionally solidified solar grade silicon

Author(s) :

Oliveira, V.A. [Auteur]
Université Grenoble Alpes [2016-2019] [UGA [2016-2019]]
Marie, B. [Auteur]
Université Grenoble Alpes [2016-2019] [UGA [2016-2019]]
Cayron, C. [Auteur]
Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
Marinova, Maya [Auteur]
Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
Tsoutsouva, M.G. [Auteur]
European Synchrotron Radiation Facility [ESRF]
Sio, H.C. [Auteur]
Australian National University [ANU]
Lafford, T.A. [Auteur]
European Synchrotron Radiation Facility [ESRF]
Baruchel, J. [Auteur]
European Synchrotron Radiation Facility [ESRF]
Audoit, G. [Auteur]
Université Grenoble Alpes [2016-2019] [UGA [2016-2019]]
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]
Grenier, A. [Auteur]
Université Grenoble Alpes [2016-2019] [UGA [2016-2019]]
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]
Tran Thi, T.N. [Auteur]
European Synchrotron Radiation Facility [ESRF]
Camel, D. [Auteur]
Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]

Journal title :

Acta Materialia

Volume number :

121

Pages :

24-36

Publication date :

2016

HAL domain(s) :

Chimie/Matériaux

English abstract : [en]

The growth structure of photovoltaic multicrystalline silicon formed by directional solidification presents a high fraction of Σ3 and higher order twins. Previous studies proposed that these complex structures are formed ...
Show more >The growth structure of photovoltaic multicrystalline silicon formed by directional solidification presents a high fraction of Σ3 and higher order twins. Previous studies proposed that these complex structures are formed by a succession of 2D nucleation events of Σ3 twins on {111} growth facets at the triple line formed by their intersection with the crucible wall, another crystal, or the surface. In this work, we report the reproducible formation of multiple twinned domains inside solar grade Si single crystals grown by directional solidification above a (111) seed. These domains start on a Σ3 twin nucleated inside the crystal bulk, and systematically develop into similar twinned structures characterized by a ternary arrangement of grains in Σ3, Σ9, and Σ27 relationship. The mechanism of formation of the initial twin nucleus is discussed, and a scenario is proposed for the processes of subsequent multiple twinning. The growth competition between twin grains is shown to promote the appearance of incoherent twin boundaries, and dislocations near grain boundaries and in the twin grains themselves. The electrical activity of Σ-boundaries is measured, and the correlation between the structure of the defects and the resulting detrimental electrical activity is then discussed.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Autres travaux scientifiques

Submission date :

2019-06-17T08:43:21Z
2020-03-16T16:08:21Z