Enhancing GaN Nanowires Performance Through Partial Coverage with Oxide Shells.

Autor: Szymon R; Department of Experimental Physics, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, Wroclaw, 50-370, Poland., Zielony E; Department of Experimental Physics, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, Wroclaw, 50-370, Poland., Sobanska M; Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, Warsaw, 02-668, Poland., Stachurski T; Department of Statistics, Econometrics and Mathematics, University of Economics in Katowice, 1 Maja 50, Katowice, 40-287, Poland., Reszka A; Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, Warsaw, 02-668, Poland., Wierzbicka A; Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, Warsaw, 02-668, Poland., Gieraltowska S; Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, Warsaw, 02-668, Poland., Zytkiewicz ZR; Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, Warsaw, 02-668, Poland.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Nov; Vol. 20 (44), pp. e2401139. Date of Electronic Publication: 2024 Jul 22.
DOI: 10.1002/smll.202401139
Abstrakt: Core-shell gallium nitride (GaN)-based nanowires offer noteworthy opportunities for innovation in high-frequency opto- and microelectronics. This work delves deeply into the physical properties of crystalline GaN nanowires with aluminum and hafnium oxide shells. Particular attention is paid to partial coverage of nanowires, resulting with exceptional properties. First, the crystal lattice relaxation is observed by X-ray diffraction, photoluminescence, and Raman spectroscopy measurements. A high potential of partial coverage for optoelectronic applications is revealed with photo- and cathodoluminescence spectra along with an exploration of their temperature dependency. Next, the study focuses on understanding the mechanisms behind the observed enhancement of the luminescence efficiency. It is confirmed that nanowires are effectively protected against photoadsorption using partial coatings. This research advances the frontiers of nanotechnology, investigating the benefits of partial coverage, and shedding light on its complex interaction with cores.
(© 2024 The Author(s). Small published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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