Thermoelectric power-factor of Ag-doped TiO2 thin film

Usop, Rohaida and Hasnan, Megat Muhammad Ikhsan Megat and Mohamad, Mahazani and Ahmad, Mohd Khairul and Mohd Said, Suhana and Mohd Salleh, Mohd Faiz (2022) Thermoelectric power-factor of Ag-doped TiO2 thin film. Micromachines, 13 (12). ISSN 2072-666X, DOI

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The thermoelectric power-factor of two types of rutile-phased nanostructured-TiO2 thin films doped with Ag was investigated at room temperature, by measuring their Seebeck coefficient and electrical conductivity. The thin films, consisting of a nanorod structure (single layer) and nanorod and nanoflower structure (bilayer) of TiO2, with the addition of different wt.% of AgNO3 were synthesized on an F:SnO2-coated glass substrate. The evaluated thermoelectric power-factor was observed to increase with an increasing wt.% of AgNO3 for both structures, with the bilayer structure increasing three times more than the undoped bilayer-structure, with a value of 148 mu Wm-K-1(-2) at 0.15 wt.%. This enhancement was due to the increase in electrical conductivity, which compensated for the small changes in the Seebeck coefficient, which were likely due to the increase in carrier concentration. Consequently, an enhancement in the thermoelectric conversion-efficiency of TiO2 thin film may be observed by Ag doping, without influencing the layer structure and material phase.

Item Type: Article
Funders: Science and Technology Development Fund (STDF) Ministry of Higher Education & Scientific Research (MHESR) (Grant No: FP092-2020 & FRGS/1/2020/TK0/UM/02/25), Universiti Malaya (Grant No: GPF014A-2019)
Uncontrolled Keywords: Titanium dioxide; Silver; Rutile phase; Nanostructure; Doping; Thermoelectric power-factor; Thermoelectric
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering > Department of Electrical Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 23 Nov 2023 03:58
Last Modified: 23 Nov 2023 03:58

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