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Erschienen in:
19.09.2017
Hydrothermal synthesis of the composited WS2–W5O14–MWCNTs for high performance dye-sensitized solar cell counter electrodes
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 24/2017
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Abstract
WS2 and W18O49/W5O14 (WS
2–W
18O
49/W
5O
14) powders were synthesized using a hydrothermal reaction of microsized WO3 particles in a HCl + Na2S·9·H2O solution. The resulting WS
2–W
18O
49/W
5O
14 powders were used as a catalyst in a counter electrode of a dye-sensitized solar cell with an efficiency of 3.37%. To enhance the DSSC’s performance, multi-walled carbon nanotubes (MWCNTs) was added to the aforementioned hydrothermal reaction producing WS
2–W
5O
14–MWCNTs composite, which can enhance an efficiency of up to 7.44%, comparable to that of Pt DSSCs (7.53%). This outstanding performance of the WS
2–W
5O
14–MWCNTs based DSSCs is attributed to high electrocatalytic activity and low charge-transfer resistance at the counter electrode and electrolyte interface at the WS
2–W
5O
14–MWCNTs electrode. This facile and cost-effective fabrication of the composited WS
2–W
5O
14–MWCNTs CE could lead to applications in commercial DSSC devices.