Articles producció científica> Enginyeria Electrònica, Elèctrica i Automàtica

Structural, morphological, optical and sensing properties of SnSe and SnSe2 thin films as a gas sensing material

  • Datos identificativos

    Identificador: imarina:5133247
    Autores:
    Assili, KawtherGonzalez, OriolAlouani, KhaledVilanova, Xavier
    Resumen:
    In this work, orthorhombic tin selenide thin films were grown onto three different substrates using an organophosphorus precursor (Ph3PSe) via chemical vapor deposition. Structural, microstructural and morphological properties of the as-grown films were systematically investigated using XRD, ESEM and AFM respectively. Grain size, microstrain and dislocation were calculated and correlated with different factors. The effects of selenization temperature and substrate type on different film properties and gas sensing response of films deposited onto alumina substrates were investigated. XRD analysis reveals the appearance of a mixed phase as a function of temperature. Furthermore, substrate type plays a key role in the rate of appearance of each phase. EDAX analysis confirms the existence of the desired elements and detect the evaporation of selenium and the appearance of oxygen at higher temperatures. Atomic force microscopy (AFM) was used to investigate the surface topography of the grown thin films. Optical properties of the films grown onto glass and silicon substrates were studied. From the recorded optical data, a direct optical band gap in the range of 0.9-1.3 eV was obtained with an absorption coefficient α >104 cm-1 throughout large spectral regions. Optical studies were remarkably affected by the obtained phase as well as the selenization temperature. Gas sensing properties of the samples deposited onto alumina substrates were examined as a new sensing material for detection of methane gas at different concentrations. SnSe sensors show high sensitivity, are reversible and exhibit fast response and recovery times compared to SnSe2 sensors.
  • Otros:

    Autor según el artículo: Assili, Kawther; Gonzalez, Oriol; Alouani, Khaled; Vilanova, Xavier
    Departamento: Enginyeria Electrònica, Elèctrica i Automàtica
    Autor/es de la URV: Vilanova Salas, Javier
    Palabras clave: Xrd Triphenylphosphine selenide Tin selenide Thermoelectric performance Thermal-properties Substrate-temperature Snse thin film Single-source precursors Sensing properties Power-factor Physical-properties Optical properties Indium selenide Electrical-properties Cvd Chemical-vapor-deposition
    Resumen: In this work, orthorhombic tin selenide thin films were grown onto three different substrates using an organophosphorus precursor (Ph3PSe) via chemical vapor deposition. Structural, microstructural and morphological properties of the as-grown films were systematically investigated using XRD, ESEM and AFM respectively. Grain size, microstrain and dislocation were calculated and correlated with different factors. The effects of selenization temperature and substrate type on different film properties and gas sensing response of films deposited onto alumina substrates were investigated. XRD analysis reveals the appearance of a mixed phase as a function of temperature. Furthermore, substrate type plays a key role in the rate of appearance of each phase. EDAX analysis confirms the existence of the desired elements and detect the evaporation of selenium and the appearance of oxygen at higher temperatures. Atomic force microscopy (AFM) was used to investigate the surface topography of the grown thin films. Optical properties of the films grown onto glass and silicon substrates were studied. From the recorded optical data, a direct optical band gap in the range of 0.9-1.3 eV was obtained with an absorption coefficient α >104 cm-1 throughout large spectral regions. Optical studies were remarkably affected by the obtained phase as well as the selenization temperature. Gas sensing properties of the samples deposited onto alumina substrates were examined as a new sensing material for detection of methane gas at different concentrations. SnSe sensors show high sensitivity, are reversible and exhibit fast response and recovery times compared to SnSe2 sensors.
    Áreas temáticas: Química Odontología Medicina ii Medicina i Materiais General chemistry General chemical engineering Farmacia Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Chemistry, multidisciplinary Chemistry (miscellaneous) Chemistry (all) Chemical engineering (miscellaneous) Chemical engineering (all) Biotecnología Biodiversidade Astronomia / física
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 1878-5352
    Direcció de correo del autor: xavier.vilanova@urv.cat
    Identificador del autor: 0000-0002-6245-7933
    Fecha de alta del registro: 2023-02-18
    Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
    Enlace a la fuente original: https://www.sciencedirect.com/science/article/pii/S1878535217301909?via%3Dihub
    Referencia al articulo segun fuente origial: Arabian Journal Of Chemistry. 13 (1): 1229-1246
    Referencia de l'ítem segons les normes APA: Assili, Kawther; Gonzalez, Oriol; Alouani, Khaled; Vilanova, Xavier (2020). Structural, morphological, optical and sensing properties of SnSe and SnSe2 thin films as a gas sensing material. Arabian Journal Of Chemistry, 13(1), 1229-1246. DOI: 10.1016/j.arabjc.2017.10.004
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI del artículo: 10.1016/j.arabjc.2017.10.004
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2020
    Tipo de publicación: Journal Publications
  • Palabras clave:

    Chemical Engineering (Miscellaneous),Chemistry (Miscellaneous),Chemistry, Multidisciplinary
    Xrd
    Triphenylphosphine selenide
    Tin selenide
    Thermoelectric performance
    Thermal-properties
    Substrate-temperature
    Snse thin film
    Single-source precursors
    Sensing properties
    Power-factor
    Physical-properties
    Optical properties
    Indium selenide
    Electrical-properties
    Cvd
    Chemical-vapor-deposition
    Química
    Odontología
    Medicina ii
    Medicina i
    Materiais
    General chemistry
    General chemical engineering
    Farmacia
    Ciências biológicas ii
    Ciências biológicas i
    Ciências ambientais
    Ciências agrárias i
    Ciência de alimentos
    Chemistry, multidisciplinary
    Chemistry (miscellaneous)
    Chemistry (all)
    Chemical engineering (miscellaneous)
    Chemical engineering (all)
    Biotecnología
    Biodiversidade
    Astronomia / física
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