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Dye-sensitized solar cells based on WO3.

Haidong Zheng¹, Yasuhiro Tachibana, Kourosh Kalantar-Zadeh

¹School of Electrical and Computer Engineering, RMIT University, Melbourne 3001, Australia. h.zheng@student.rmit.edu.au

Langmuir : the ACS Journal of Surfaces and Colloids

|November 17, 2010

Summary

This study introduces tungsten oxide (WO(3)) as a novel photoanode material for dye-sensitized solar cells (DSCs), achieving up to 1.46% efficiency after TiCl(4) treatment. This research overcomes previous limitations of WO(3) in solar cell applications.

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Area of Science:

Materials Science
Renewable Energy
Photovoltaics

Background:

Tungsten oxide (WO(3)) is an underexplored photoanode material for dye-sensitized solar cells (DSCs).
Previous research has overlooked WO(3) due to its acidic surface and unfavorable conduction band edge position compared to TiO(2) and ZnO.

Purpose of the Study:

To investigate the potential of porous WO(3) nanoparticle films as photoanodes in DSCs.
To evaluate the performance enhancement of WO(3) DSCs after surface treatment with TiCl(4).

Main Methods:

Fabrication of dye-sensitized solar cells using porous WO(3) nanoparticle films.
Characterization of WO(3) multicrystalline structure using Raman spectroscopy and X-ray diffraction.
Performance evaluation of WO(3) DSCs before and after TiCl(4) treatment.

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Main Results:

Successfully fabricated DSCs using porous WO(3) nanoparticle films with an initial efficiency of 0.75%.
Confirmed the multicrystalline structure of WO(3) through Raman spectroscopy and XRD analysis.
Achieved a significant performance enhancement, with TiCl(4)-treated WO(3) DSCs reaching an efficiency of 1.46%.

Conclusions:

Porous WO(3) nanoparticle films are viable photoanodes for DSCs.
TiCl(4) surface treatment significantly enhances the efficiency of WO(3)-based DSCs.
This study demonstrates a promising pathway for utilizing WO(3) in next-generation solar cell technologies.