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The influence of the growth parameters on the photoluminescence (PL) spectra has been investigated for samples with columnar morphology, either with InN columns on original substrates or as free-standing nanowires. Valuable information about band gap and electron concentration was obtained by line shape analysis. Optical band gaps between 730 and 750 meV and electron concentrations of 8 × 1017 to 6 × 1018 cm-3 were derived from the fit of the PL spectra of different samples. The crystalline quality of the wires was investigated by high-resolution transmission electron microscopy.
American Chemical Society
Publication date: 
12 Jul 2006

Toma Stoica, Ralph J Meijers, Raffaella Calarco, Thomas Richter, Eli Sutter, Hans Lüth

Biblio References: 
Volume: 6 Issue: 7 Pages: 1541-1547
Nano letters