Título:
Insights on the structural and electrical transport of sodium titanate nanotubes decorated with CuInS2 quantum dots heterostructure
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Autor:
Esteves, Martín
Mombrú, Dominique
Romero, Mariano
Fernández Werner, Luciana
Faccio, Ricardo
Mombrú, Alvaro W.
Mombrú, Dominique
Romero, Mariano
Fernández Werner, Luciana
Faccio, Ricardo
Mombrú, Alvaro W.
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Tipo de documento:
Preprint
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Palabras clave:
NANOTECNOLOGIA
CELULAS SOLARES
MICROSCOPIA
TITANIO
HETEROESTRUCTURAS
PUNTOS CUANTICOS
CELULAS SOLARES
MICROSCOPIA
TITANIO
HETEROESTRUCTURAS
PUNTOS CUANTICOS
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Año de publicación:
2021
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Resumen:
In this work we present the synthesis of nanoscale heterostructures comprising sodium titanate nanotubes
Na2Ti2O5·H2O (NaNT) decorated with CuInS2 (CIS) quantum dots with different sizes and weight fractions. Our
study focused on the structural, microstructural, electrical and optical characterization of the nanoscale het erostructure by means of high-resolution transmission electron microscopy, atomic force microscopy, grazing
incidence small angle X-ray scattering, confocal Raman microscopy, UV–Vis and impedance spectroscopy ana lyses. In most cases, these nanoscale heterostructures exhibited considerable enhancement on the electrical
conductivity explained in terms of efficient interconnections between the titanate nanotubes and CIS quantum
dots. UV–Vis spectroscopy characterization showed a decrease in the optical band gap in comparison to the pure
NaNT from 3.68 to 3.45 eV. Impedance spectroscopy analysis confirmed the efficient electrical interconnections
between titanate nanotubes, yielding not only to a decrease in the titanate junction resistance but also to an
apparent decrease in the junction barrier voltage. All these features could postulate these nanoscale hetero structures as good candidates as photoelectrodes in solar cell applications.
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Esteves, M, Mombrú, D, Romero, M, y otros. "Insights on the structural and electrical transport of sodium titanate nanotubes decorated with CuInS2 quantum dots heterostructure". [Preprint] Publicado en: Applied Surface Science [en línea] 2021, 535:147733. doi 10.1016/j.apsusc.2020.147733
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Licencia Creative Commons Atribución - No Comercial - Sin Derivadas (CC - By-NC-ND 4.0)
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| Ficheros | Descripción | Tamaño | Formato | ||
|---|---|---|---|---|---|
| PrePrint_Esteves.pdf | Preprint | 3.08 MB | Adobe PDF |