A path to high ZnSe quantum wires

USTC has found a way to high -performance ZnSe quantum wires

(a) Growth-dependent fixed-growth. (b) Two growth catalyzed stages for the independent radial and large axial power of ZnSe QWs. Published: Science China Press

Single semiconductor nanowires with a strong quantum confinement effect – quantum wires (QWs) – are of great interest for applications in high -end optoelectronics and image processing. In addition to Cd’s innovations, ZnSe QWs, as a heavy-metal-free semiconductor, have demonstrated great potential for next-generation environmental applications.

Unfortunately, ZnSe nanowires produced so far have been limited to a strong quantum confinement state with near-violet-light absorption or a large state with unscernible exciton features. At the same time, on demand, and high -precision manipulations of their radial and axial magnitude – to allow strong quantum confinement in the blue -light field – it is very difficult, the which greatly hindered their further application.

In a recent article published on National Science Review, a research group led by professor YU Shuhong at the University of Science and Technology of China (USTC) demonstrated the combination of high, red-red-active ZnSe QWs in the development of a simple synthetic pathway – two steps. The catalytic development system achieves independent, high precision, and wide -range controls over the diameter and length of ZnSe QWs. In this way, they bridge the gap between the original ZnSe QWs and ZnSe nanowires as a whole.

The researchers found a new epitaxial pattern between the cubic-phase catalyst instructions and the wurtzite ZnSe QWs kinetically preferred to form ultrathin QWs, stacking fault-free QWs. The capture of the quantum energy, the power of high volume, and the absence of the combined particles lead to their melting, ultranarrow excitonic absorption in the red -blue part with a full width in half height (FWHM) of sub-13 nm. After thiol surface passivation, they re-eliminated the surface electron traps in these ZnSe QWs, resulting in longer carriers and high solar-to-H performance.2 conversion.

The two -step growth phase is expected due to the large number of colloidal nanowires. The availability of such high-end nanowires will provide a valuable resource for heavy-metal free applications in solar fuels and optoelectronics in the future.


Two-photon absorption and stimulation of poly-crystalline zinc selenide with femtosecond laser excitation


More information:
Yi Li et al, On demand describing high ZnSe, light-active quantum colloidal wires, National Science Review (2022). DOI: 10.1093 / nsr / nwac025

Presented by Science China Press

Directions: Pathway to ZnSe quantum high quality wire (2022, April 8) retrieved April 9, 2022 from https://phys.org/news/2022-04-pathway-high-quality-znse-quantum-wires .html

This document is subject to copyright. Except for appropriate work for the purpose of personal inquiry or research, no piece may be reproduced without permission. Information is provided for informational purposes only.

Related Posts

Leave a Reply

Your email address will not be published.