Solution-processed Antimony Sulfide Solar Cells
Ute Cappel a, Flannan O'Mahony a, Michael Brown a, Saif Haque a
a Imperial College London, United Kingdom, South Kensington, Londres, Reino Unido, United Kingdom
International Conference on Hybrid and Organic Photovoltaics
Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Ecublens, Switzerland, 2014 May 11th - 14th
Organizers: Michael Graetzel and Mohammad Nazeeruddin
Oral, Ute Cappel, presentation 213
Publication date: 1st March 2014

Antimony sulfide is a promising material for active layers of solar cells due to its high extinction coefficient and band gap of 1.7 eV. It has been used as an alternative light harvester to molecular dyes on mesoporous titanium dioxide in solid state dye-sensitized solar cells, where efficiencies of more than 6% were achieved. In our research, we have used metal xanthate precursors to form metal sulfides either in blends with a hole transporting polymeror within the pores of mesoporous TiO2.We have applied this method to make antimony sulfide, successfully fabricating solar cells where antimony sulfide acts as the electron transport material.3,4

In this presentation, I will summarise the different solar cell structures, which we have made using antimony sulfide processed from antimony xanthate. These include bulk heterojunction hybrid solar cells, semiconductor sensitized solar cells and bilayer cells. I will show that efficient solar cells can be made in all three architectures. Furthermore, I will present results from transient absorption spectroscopy ranging from femto- to millisecond timescales, giving details of the charge generation mechanism in the different types of solar cells. The charge generation mechanism varies between the different types of solar cells, demonstrating the versatility of Sb2S3 as a photo-active material for solar cells.



1. S. A. Dowland, L. X. Reynolds, A. MacLachlan, U. B. Cappel, and S. A. Haque, J. Mater. Chem. A, 2013, 1, 13896–13901. 2. T. Lutz, A. MacLachlan, A. Sudlow, J. Nelson, M. S. Hill, K. C. Molloy, and S. A. Haque, Phys. Chem. Chem. Phys., 2012, 14, 16192–6. 3. N. Bansal, F. T. F. O’Mahony, T. Lutz, and S. A. Haque, Adv. Energy Mater., 2013, 3, 986–990. 4. F. T. F. O’Mahony, U. B. Cappel, N. Tokmoldin, T. Lutz, R. Lindblad, H. Rensmo, and S. A. Haque, Angew. Chem., Int. Ed., 2013, 52, 12047–12051.
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