Characterization of Radial ZnO-Core/ZnS-Shell Nanowire Heterostructures ALD-Deposited at Atmospheric Pressure Using DEZn, N2O and DTBS. (8th November 2016)

• Record Type: Journal Article
• Authors: Wen, Sheng-Wen; Huang, Bo-Hao; Kang, Jun-Jie; Lin, Tai-Yuan; Hsu, Hsun-Feng; Ni, Ho-Ching; Hou, Ching-Hsiang; Lai, Hui Ting; Gong, Jyh-Rong
• Is Part Of: ECS journal of solid state science and technology. Volume 5:Number 12(2016)
• Page Start: P663
• Page End: P666
• Publication Date: 2016-11-08
• Subjects: Atomic layer deposition -- Crystal structure -- Photoluminescence -- Semiconducting II-VI materials -- X-ray diffraction -- Zinc oxides; Solid state chemistry -- Periodicals; Electronics -- Materials -- Periodicals; Electrochemistry -- Periodicals; 541.0421
• DOI: 10.1149/2.0181612jss
• Languages: English
• ISSNs: 2162-8777

Abstract

Abstract : In this study, radial ZnO-core/ZnS-shell nanowire heterostructures were deposited at atmospheric pressure by atomic layer deposition (ALD) using diethylzinc (DEZn), nitrous oxide (N2 O) and ditert-butylsulfide (DTBS) precursors. The structural and optical properties of radial ZnO-core/ZnS-shell nanowire heterostructures were characterized using θ-2θX-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and photoluminescence spectroscopy (PL). It was found that both ZnO-core and ZnS-shell of the ALD-deposited radial ZnO-core/ZnS-shell nanowire heterostructure were wurtzite in nature based upon the results of HRTEM investigations. Moiré fringes were identified in the radial ZnO-core/ZnS-shell nanowire structure with an observed period being in good agreement with the lattice mismatch between ZnO-core and ZnS-shell of the pseudomorphic ZnO-core/ZnS-shell nanowire heterostructure. Neutral donor excitonic emissions (D°X) along with related longitudinal optical phonon (LO) replicas of ZnO cores were observed in the 10 K PL of the ALD-deposited radial ZnO-core/ZnS-shell nanowire heterostructures.