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Innovative Energy & Research | ISSN: 2576-1463 | Volume 7
Renewable Energy and Resources
Energy Materials and Fuel Cell Research
2
nd
International Conference on
&
August 27-28, 2018 | Boston, USA
Gaint Seebeck coefficient in the microwave synthesized β-Co (OH) 2 nanoplatelets for thermoelectric
power generators
Ahmed Alshahrie,
1
Numan Salah,
1
Asim Jilani,
1
Adnan Memic,
1
Abdullah Alshiki
1
and
Kunihito Koumoto
2
1
King Abdulaziz University, Saudi Arabia
2
Toyota Physical and Chemical Research Institute Nagakute, Japan
R
enewable energy is quite important for the future energy demands. It also can overcome the global warming and CO2
emissions created by fossil fuels combustion. Sunlight heat and other sources of heat are considered as a good sources for
renewable energy. Thermoelectric materials (TE) are promising as energy generators, by means converting heat into electrical
energy. In this work cobalt hydroxide (β-Co(OH)2) nanoplatelets were synthesized by the microwave chemical assisted route
and studied for their thermoelectric properties. Uniform nanoplatelets were produced with a thickness and diameter around
8 and 100 nm, respectively. The TE measurements revealed a giant positive value for Seebeck coefficient, which is around
50,000 µV/K. This positive value indicating a p-type semiconductor. It was observed to slightly increase by increasing the
temperature from room temperature to 400 K. The electrical conductivity of this nanostructure has a semiconductor behavior
with a moderate value, which has been observed to increase from 0.4 to around 3 S/m by increasing the temperature in the
above-mentioned range. The power factor value was calculated and found to strongly depend on the temperature. It drastically
increased from 500 to 9000 µW/m.K2 by increasing the temperature from room temperature to 400 K. These preliminary
results are quit promising for future TE materials and might be suitable for thermoelectric power generators.
Biography
Ahmed Salem Alshahrie is the director of the Nanotechnology center and head of the Physics department at King Abdulaziz University. He has BSc, in Physics in
2001, King Abdulaziz University; MPhil in Physics, 2007 University of Wales Swansea, Swansea UK. PhD, in Physics, Swansea University, Swansea UK. Teaching
different courses in the Physics Department. He spent a good time at a well recognized research center. His research work is mainly focused on Photonic Nanoma-
terials, Raman Spectroscopy, nanostructure, Synthesis, Characterization applications. He has a good number of articles published in revered international journals.
aalshahri@kau.edu.saAhmed Alshahrie, Innov Ener Res 2018, Volume 7
DOI: 10.4172/2576-1463-C2-006