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16.07.2020 | Original Research

Influence of nanocellulose concentration on the tunability of energy bandgap of cadmium telluride thin films

verfasst von: Sunday Samuel Oluyamo, Lawrence Olakunle Akinboyewa, Ibiyinka Agboola Fuwape, Olajide Ibukun-Olu Olusola, Mathew Adefusika Adekoya

Erschienen in: Cellulose | Ausgabe 14/2020

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Abstract

Cadmium telluride (CdTe) doped nanocellulose thin films were successfully deposited on glass/fluorine-doped tin oxide substrates from an aqueous electrolyte bath containing hydrated cadmium sulfate (3CdSO₄·8H₂O) and tellurium dioxide using electrodeposition technique. Six samples of CdTe thin films were grown with nanocellulose concentrations of (0, 1, 3, 5, 7, and 9) ppm. The results obtained from electronic data of the deposited layers using UV–Vis spectrophotometer agree favourably with the theoretical formulation. The bandgap of the films ranges from 1.32 to 1.67 eV. The lowest bandgap of CdTe (1.32 eV) was achieved at a concentration of 9 ppm. This relatively low energy bandgap is remarkable in recent formation of CdTe. Photoelectrochemical cell measurement shows that the electrical conductivity type of undoped CdTe is n-type while the nanocellulose doped CdTe is p-type in electrical conduction. Hence, it is possible to effectively tune the conductive properties of CdTe by careful addition of nanocellulose concentration.

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Titel: Influence of nanocellulose concentration on the tunability of energy bandgap of cadmium telluride thin films
verfasst von: Sunday Samuel Oluyamo
Lawrence Olakunle Akinboyewa
Ibiyinka Agboola Fuwape
Olajide Ibukun-Olu Olusola
Mathew Adefusika Adekoya
Publikationsdatum: 16.07.2020
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 14/2020
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-020-03345-w

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