# Siam Physics Congress 2015

20-22 May 2015
Asia/Bangkok timezone
The Centennial Celebration of General Relativity Theory and 80 Years of Thai Physics Graduate

## Chemical Vapor Deposition (CVD) Synthesis of Graphite Encapsulated Magnetite Nanoparticles for Counter Electrode of Dye-sensitized Solar Cells

21 May 2015, 09:30
15m
Phokeethra Grand Ballroom ()

### Phokeethra Grand Ballroom

Oral presentation Material Physics, Nanoscale Physics and Nanotechnology

### 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.

### Primary 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)

### Presentation Materials

There are no materials yet.
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