Diketopyrrolopyrrole-based sensitizers for dye-sensitized solar cell applications: anchor engineering
作者:Thomas W. Holcombe、Jun-Ho Yum、Yongjoo Kim、Kasparas Rakstys、Michael Grätzel
DOI:10.1039/c3ta13643d
日期:——
A series of donor–chromophore–anchor (D–C–A) sensitizers comprising the diketopyrrolopyrrole (DPP) chromophore were synthesized and tested in both I3−/I− and Co[(bpy)]3+/2+ redox shuttle DSC devices. The dye series was strategically designed to elucidate structure–property relationships, concerning overall performance and compatibility with these two electrolytes. Selective fluorine incorporation improved I3−/I−-based DSC performance, while hindering performance with the positively charged cobalt-based redox shuttle. Incorporation of a pyridine heterocycle into the DPP chromophore increased spectral breadth, but decreased performance metrics for both electrolyte systems. These results are understood through detailed electrochemical, photophysical, and computational studies.
我们合成了一系列由二酮吡咯并吡咯(DPP)发色团组成的供体-发色团-锚(D-C-A)敏化剂,并在 I3-/I- 和 Co[(bpy)]3+/2+ 氧化还原穿梭 DSC 器件中进行了测试。对染料系列进行了战略性设计,以阐明与这两种电解质的整体性能和兼容性有关的结构-性能关系。选择性掺入氟提高了基于 I3-/I- 的 DSC 性能,同时阻碍了带正电荷的钴基氧化还原穿梭器的性能。在 DPP 发色团中加入吡啶杂环增加了光谱广度,但降低了两种电解质系统的性能指标。通过详细的电化学、光物理和计算研究,我们可以理解这些结果。