Investigation on the optical and electrical properties of undoped and Sb-doped SnO2 nanowires obtained by the VLS method

Author(s)

Costa, I. M. ^{[1, 2]} ; Cunha, T. R. ^[1] ; Cichetto Jr, L. ; Zaghete, M. A. ^[2] ; Chiquito, A. J. ^[3]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Estadual Paulista UNESP, Inst Quim, LIEC, BR-14800060 Araraquara, SP - Brazil

^[3] Cichetto Jr, Jr., L., Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES; v. 134, OCT 2021.
• Web of Science Citations: 0

Abstract

In this work, we report the effects of Sb doping on the optical and electrical properties of the SnO2 nanowires obtained by the vapor-liquid-solid (VLS) method. The absorption edges were found to be 3.30 eV and 3.66 eV for undoped SnO2 and Sb-doped SnO2 (ATO) nanowires, respectively. The energy shift was related to the BursteinMoss effect taking place in the doped nanowires. We studied the ATO optical bandgap (Delta E = 0.36 eV) shift as a function of carrier concentration. The incorporation of Sb caused the resistivity to decrease three orders of magnitude for single-nanowire ATO devices. In addition, it was found that undoped SnO2 nanowires exhibit semiconductor characteristics while a metal-insulator transition (MIT), around 170 K, was observed in the ATO nanowires. (AU)

• FAPESP's process: 19/12383-8 - Study of structural and vibrational properties of glass and glass-ceramic materials via Raman scattering as a function of temperature and high hydrostatic pressures.
• Grantee: Thiago Rodrigues da Cunha
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 17/23663-6 - Irradiation by femtosecond laser in thin films of LaNiO3 deposited by PLD for study of structural and physical properties for application in ferroelectric memories
• Grantee: Leonélio Cichetto Junior
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 14/01371-5 - Obtention of memories with LaNiO3 and LaNiO3/BaTiO3 using PLD
• Grantee: Leonélio Cichetto Junior
• Support Opportunities: Scholarships in Brazil - Post-Doctoral