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Updated: Aug 15, 2026

Atom Probe Tomography Studies on the Cu(In,Ga)Se2 Grain Boundaries
Published on: April 22, 2013
Dipole Orientation Shift of Ga2Se2 by Quantum Confinement
Ke Xiao1, Tengfei Yan1, Xiaodong Cui1
1Department of Physics , University of Hong Kong , Hong Kong , China.
Abstract:
In the family of III-VI monochalcogenides M2X2 (M = gallium, indium; X = sulfur, selenide, etc.), the interlayer interaction and the electronic band edges share the contribution of the same chalcogenide atomic orbits. This makes quantum confinement and interlayer interaction play a subtle role in two-dimensional (2D) monochalcogenides crystals. In this report, we study the direction-resolved photoluminescence of 2D Ga2Se2 at various thicknesses. We observe that the in-plane dipole radiation survives, but out-of-plane dipole radiation fades at 2D limits.
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