Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Antimony sulfide is a direct band gap semiconductor with a band gap 2.2 eV in its amorphous orange color Sb2S3 and 1.7 eV of crystalline black color Sb2S3, which holds potential applications in solar cells and optical data storage. It has been used in high performance semiconductor-sensitized solar cells (SSSCs) as a light harvester, due to its high light absorption coefficient. Sb2S3 can form stable complexes with bifunctional hole-transporting materials in SSSCs, and this is a key to obtain high-efficiency semiconductor sensitized inorganic-organic hetero-junction solar cell. No systematic studies about synthesis of amorphous and crystalline Sb2S3 NCs have been reported. Herein, Phase and shape-controlled Sb2S3 NCs is synthesized by hot inject colloidal method and cation ion exchange. The effect of different Antimony and Sulfur precursors on the shape and size of Sb2S3 NCs is examined. Foreign ion’s effect on the shape and crystallinity of as-prepared Sb2S3 NCs is studied. We found out that Chlorine ion can change of shape of Sb2S3 NCS from spherical to hyper branched NCs. In addition, Sb2S3 NCs is ligand exchanged with 1-Thioglycerol and Sb2S3 paste is prepared. It is diluted in Isopropanol before spin coating. Photovoltaic devices are fabricated as FTO/d-TiO2/meso-TiO2/Sb2S3 /Spiro-OMETED/Au, and its highest power conversion efficiency is 1.13% so far.
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