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Regular version of the site

Article

A hybrid halobismuthate light-harvesting material with an optical band gap of 1.70 eV

New Journal of Chemistry. 2016. Vol. 40. No. 12. P. 10041-10047.
Vitalii Yu. Kotov, Ilyukhin A. B., Birin K. P., Laurinavichyute V. K., Sadovnikov A. A., Dobrokhotova Z. V., Kozyukhin S. A.

A new organic inorganic hybrid material (C15H14N4)BiBr5 center dot H2O with an optical band gap of 2.24 eV, having 1-D chains of bromobismuthate anions in its composition, has been obtained from an aqueous solution and characterized. The partial replacement of Br by I resulted in the formation of a thermally stable (<155 degrees C) black compound (C15H14N4)BiBrI4 center dot H2O with an optical band gap of 1.70 eV, which can be proposed as a promising light-harvesting material for dye-sensitized solid-state solar cells. Further replacement of Br by I results in the formation of red-orange colored (C15H14N4)BiI5 with a band gap of 2.10 eV.