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The role of surface properties in the cathodoluminescence of Zn2GeO4/SnO2 nanowire heterostructures
- Publication Year :
- 2020
-
Abstract
- ©2020 Elsevier B.V. All rights reserved. This work was supported by MICIN (Grant RTI2018-09195-B-I00).<br />Herein, we report the influence of the surface conditions on the cathodoluminescence (CL) emissions from Zn_2GeO_4 nanowires and Zn_2GeO_4/SnO_2 heterostructures obtained by thermal evaporation technique. A Zn_2GeO_4 nanowire surrounded by a discontinuous shell of SnO_2 crystals composed the Zn_2GeO_4/SnO_2 heterostructures. Local CL measurements at different acceleration voltages allow monitoring the emission bands originated at the interface region, showing an additional deep-ultraviolet (UV) emission at 4.40 eV, which has not been previously reported. CL spectra from SnO_2 coated Zn_2GeO_4 nanowires also show this deep-UV emission. The results would confirm the presence of a shallow energy level close to the conduction band, which becomes active by passivation of Zn_2GeO_4 nanowires surface by the SnO_2 coating.<br />Ministerio de Ciencia e Innovación (MICINN)<br />Depto. de Física de Materiales<br />Fac. de Ciencias Físicas<br />TRUE<br />pub
Details
- Database :
- OAIster
- Notes :
- application/pdf, 0167-577X, English
- Publication Type :
- Electronic Resource
- Accession number :
- edsoai.on1450546913
- Document Type :
- Electronic Resource