Pseudodirect to Direct Compositional Crossover in Wurtzite GaP/InxGa1-xP Core-Shell Nanowires
L Gagliano (Eindhoven University of Technology)
A. Belabbes (King Abdullah University of Science and Technology, Friedrich Schiller University Jena)
M Albani (University of Milano-Bicocca)
S. Assali (Eindhoven University of Technology)
M. A. Verheijen (Philips Innovation Services, Eindhoven University of Technology)
L Miglio (University of Milano-Bicocca)
F. Bechstedt (Friedrich Schiller University Jena)
J. E.M. Haverkort (Eindhoven University of Technology)
E. P.A.M. Bakkers (Eindhoven University of Technology, TU Delft - QN/Bakkers Lab)
More Info
expand_more
Abstract
Thanks to their uniqueness, nanowires allow the realization of novel semiconductor crystal structures with yet unexplored properties, which can be key to overcome current technological limits. Here we develop the growth of wurtzite GaP/InxGa1-xP core-shell nanowires with tunable indium concentration and optical emission in the visible region from 590 nm (2.1 eV) to 760 nm (1.6 eV). We demonstrate a pseudodirect (δ8c-δ9v) to direct (δ7c-δ9v) transition crossover through experimental and theoretical approach. Time resolved and temperature dependent photoluminescence measurements were used, which led to the observation of a steep change in carrier lifetime and temperature dependence by respectively one and 3 orders of magnitude in the range 0.28 ± 0.04 ≤ x ≤ 0.41 ± 0.04. Our work reveals the electronic properties of wurtzite InxGa1-xP.
No files available
Metadata only record. There are no files for this record.