Direct measurement of the exciton binding energy and effective masses for charge carriers in organic–inorganic tri-halide perovskites
Nature Physics Springer Science and Business Media LLC 11:7 (2015) 582-587
Direct measurement of the exciton binding energy and effective masses for charge carriers in organic–inorganic tri-halide perovskites
Nature Physics Springer Nature 11:7 (2015) 582-587
Surface-Effect-Induced Optical Bandgap Shrinkage in GaN Nanotubes.
Nano letters 15:7 (2015) 4472-4476
Abstract:
We investigate nontrivial surface effects on the optical properties of self-assembled crystalline GaN nanotubes grown on Si substrates. The excitonic emission is observed to redshift by ∼100 meV with respect to that of bulk GaN. We find that the conduction band edge is mainly dominated by surface atoms, and that a larger number of surface atoms for the tube is likely to increase the bandwidth, thus reducing the optical bandgap. The experimental findings can have important impacts in the understanding of the role of surfaces in nanostructured semiconductors with an enhanced surface/volume ratio.Reduced Stark shift in three-dimensionally confined GaN/AlGaN asymmetric multi-quantum disks
Optical Materials Express Optica Publishing Group 5:4 (2015) 849-857
Hot carrier relaxation of Dirac fermions in bilayer epitaxial graphene.
Journal of physics. Condensed matter : an Institute of Physics journal 27:16 (2015) 164202