The structure–property relationship of organic dyes in mesoscopic titania solar cells: only one double-bond difference

• DOI: 10.1039/c1ee01849c
• Publication Date: 2011-07-21T11:00:40Z
• Authors: Jingyuan Liu; Difei Zhou; Mingfei Xu; Xiaoyan Jing; Peng Wang
• Keywords: Triphenylamine

A photosensitizer plays a crucial role in the conversion of solar light to electricity dye-sensitized cells (DSCs). Thereby an all-sided apprehension on its structure–property relationship should large extent expedite rational material design. In this paper, we investigate some general impacts one double-bond variation upon optoelectronic features three pairs cyanoacrylic acid dyes. One insertion between triphenylamine electron donor and π-conjugated heterocycles such as thiophene, 3,4-ethylenedioxythiophene 4,4-dihexyl-4H-cyclopenta[2,1-b:3,4-b]dithiophene endows bathochromic effect terms electronic absorption dye-coated titania film, but leads relatively lower injection yield indicated by transient emission measurements. Moreover, style more incorporation brings forth open-circuit photovoltage, owing occurrences downwards shifted conduction band edge augmented rate constant charge recombination at titania/electrolyte interface revealed electrical impedance analyses.