Abstract
The tapered CdS nanobelts and CdSe nanowires were prepared by hydrogen-assisted thermal evaporation method. Different supersaturation leads to two different kinds of 1D nanostructures. The PL measurements recorded from the as-prepared tapered CdS nanobelts and CdSe nanowires show only a bandgap emission with relatively narrow full-width half maximum, which means that they possess good optical property. The as-synthesized high-quality tapered CdS nanobelts and CdSe nanowires may be excellent building blocks for photonic devices.
Highlights
One-dimensional (1D) nanostructures such as nanowires, nanorods, nanobelts, and nanotubes have become the focusM
In order to achieve their full potential in optical applications, it is essential to prepare 1D II-VI semiconductors, which possess predominantly bandgap emission without defect-related emission, namely good optical property [4]
Defect-related emission (750 nm) appeared in the PL spectra of CdS nanobelts and nanowires prepared by direct reaction of Cd and S and thermal evaporation of CdS, respectively [7, 8]
Summary
One-dimensional (1D) nanostructures such as nanowires, nanorods, nanobelts, and nanotubes have become the focusM. Barrellet et al [6] reported that CdS nanowires, synthesized by thermal decomposition of the single-source molecular precursors via the vapor–liquid–solid (VLS), possessed only a bandgap emission. Defect-related emission (750 nm) appeared in the PL spectra of CdS nanobelts and nanowires prepared by direct reaction of Cd and S and thermal evaporation of CdS, respectively [7, 8].
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