Speaker
Sujinda Chaiyachad
(Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, THAILAND 40002)
Description
In this project, graphite encapsulated magnetite nanoparticle in carbon matrix was synthesized using a chemical vapor deposition (CVD) and used as a counter electrode of dye-sensitized solar cells (DSSCs). The CVD reaction employed iron(III)nitrate nanohydrate and glucose as precursors, NaCl as a supporting material and methane as a carbon source. The reaction temperature was varied at 700, 750, 780 and 850 ${}^{\circ}$C. The DSSC with the synthesized graphite encapsulated magnetite nanoparticle in carbon matrix counter electrode performed the highest solar cell efficiency of 4.56 %. This was higher than the DSSCs with graphite counter electrode produced by the same CVD condition and that with magnetite nanoparticle counter electrode which were 2.36 % and 1.34 %, respectively, and comparable to that of the DSSC with Pt counter electrode which was 4.72 %. The high performance of the graphite encapsulated magnetite nanoparticle in carbon matrix counter electrode was accounted for a combination of a good electrical conductivity of graphite and carbon matrix and a good catalytic property of magnetite nanoparticles.
Author
Sujinda Chaiyachad
(Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, THAILAND 40002)
Co-author
Dr
Viyada Harnchana
(Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, THAILAND 40002)
