Fig. 4
From: Strained GaAs/InGaAs Core-Shell Nanowires for Photovoltaic Applications
(color online) (a) PL spectrum at 12 K from a core-shell NW sample with ≈50-nm shell thickness. b Temperature-dependent PL measurements from the same core-shell NW sample with ≈50-nm shell thickness. c Comparison of low-temperature PL spectra at the GaAs band edge between the core-shell NW sample with ≈50-nm shell thickness, an undoped GaAs bulk sample, and reference GaAs NWs. d GaAs core free exciton energy position at 12 K as a function of InGaAs shell thickness. e Comparison of low-temperature PL spectra for core-shell NW samples with varying shell thicknesses