Abou-Ras, Daniel

Albe, Karsten

Barragan-Yani, Daniel

Greiner, Dieter

Heinemann, Marc-Daniel

Li, Chen

Mainz, Roland

Sanli, Ekin Simsek

Sigle, Wilfried

Stange, Helena

van Aken, Peter A.

Abstract: Significant structural evolution occurs during the deposition of CuInSe2 solar materials when the Cu content increases. We use in situ heating in a scanning transmission electron microscope to directly observe how grain boundaries migrate during heating, causing nondefected grains to consume highly defected grains. Cu substitutes for In in the near grain boundary regions, turning them into a Cu-Se phase topotactic with the CuInSe2 grain interiors. Together with density functional theory and molecular dynamics calculations, we reveal how this Cu-Se phase makes the grain boundaries highly mobile

Institutional Repository Universiteit Antwerpen

Secondary-phase-assisted grain boundary migration in CuInSe\u2082

Secondary-phase-assisted grain boundary migration in CuInSe\u2082

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Institutional Repository Universiteit Antwerpen