Thermoelectric power-factor of Ag-doped TiO2 thin film
Document Type
Article
Publication Date
12-1-2022
Abstract
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.
Keywords
Titanium dioxide, Silver, Rutile phase, Nanostructure, Doping, Thermoelectric power-factor, Thermoelectric
Divisions
sch_ecs
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)
Publication Title
Micromachines
Volume
13
Issue
12
Publisher
MDPI
Publisher Location
ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND