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García Tecedor, Miguel and Bartolomé Vílchez, Javier and Maestre Varea, David and Cremades Rodríguez, Ana Isabel and Trampert, A. (2019) Li_2SnO_3 branched nano- and microstructures with intense and broadband white-light emission. Nano research, 12 (2). pp. 441-448. ISSN 1998-0124
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Official URL: http://dx.doi.org/10.1007/s12274-018-2236-0
Abstract
Exploiting the synergy between microstructure, morphology and dimensions by suitable nanomaterial engineering, can effectively upgrade the physical properties and material performances. Li_2SnO_3 elongated nano-and microstructures in form of belts, wires, rods and branched structures have been fabricated by a vapor-solid method at temperatures ranging from 700 to 900 degrees C using metallic Sn and Li_2CO_3 as precursors. The achievement of these new morphologies can face challenging applications for Li_2SnO_3, not only in the field of energy storage, but also as building blocks in optoelectronic devices. The micro-and nanostructures grown at 700 and 800 degrees C correspond to monoclinic Li2SnO3, while at 900 degrees C complex Li_2SnO_3/SnO_2 core-shell microstructures are grown, as confirmed by X-ray diffraction and Raman spectroscopy. Transmission electron microscopy reveals structural disorder related to stacking faults in some of the branched structures, which is associated with the presence of the low-temperature phase of Li_2SnO_3. The luminescent response of these structures is dominated by intense emissions at 2, 2.5 and 3 eV, almost completely covering the whole range of the visible light spectrum. As a result, white-light emission is obtained without the need of phosphors or complex quantum well heterostructures. Enhanced functionality in applications such as in light-emitting devices could be exploited based on the high luminescence intensity observed in some of the analysed Li_2SnO_3 structures.
Item Type: | Article |
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Additional Information: | © 2019 Tsinghua University Press and Springer-Verlag Berlin Heidelberg |
Uncontrolled Keywords: | Microwave dielectric-properties; Luminescence properties; Emitting-diodes; Anode material; Tin oxide; Lithium; Electrode; Ceramics; Phosphor; Alloy |
Subjects: | Sciences > Physics > Materials Sciences > Physics > Solid state physics |
ID Code: | 51710 |
Deposited On: | 07 Mar 2019 16:19 |
Last Modified: | 01 Mar 2020 00:01 |
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