A benzothiazole–cyclopentadithiophene bridged D–A–π–A sensitizer with enhanced light absorption for high efficiency dye-sensitized solar cells†
Abstract
We demonstrate an efficient D–A–π–A sensitizer with a benzothiazole–cyclopentadithiophene moiety as the spacer in a triphenylamine organic dye for dye-sensitized solar cells. The dye has a broad visible light absorption range up to 800 nm. A power conversion efficiency >9% has been achieved using a [Co(bpy)3]2+/3+-based electrolyte.