Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States.
J Am Chem Soc. 2016 Dec 28;138(51):16745-16753. doi: 10.1021/jacs.6b10699. Epub 2016 Dec 15.
Tandem junction photoelectrochemical water-splitting devices, whereby two light absorbing electrodes targeting separate portions of the solar spectrum generate the voltage required to convert water to oxygen and hydrogen, enable much higher possible efficiencies than single absorber systems. We report here on the development of a tandem system consisting of a dye-sensitized photoelectrochemical cell (DSPEC) wired in series with a dye-sensitized solar cell (DSC). The DSPEC photoanode incorporates a tris(bipyridine)ruthenium(II)-type chromophore and molecular ruthenium based water oxidation catalyst. The DSPEC was tested with two more-red absorbing DSC variations, one utilizing N719 dye with an I/I redox mediator solution and the other D35 dye with a tris(bipyridine)cobalt ([Co(bpy)]) based mediator. The tandem configuration consisting of the DSPEC and D35/[Co(bpy)] based DSC gave the best overall performance and demonstrated the production of H from HO with the only energy input from simulated solar illumination.
串联结光电化学水分解装置，其中两个针对太阳能光谱不同部分的光吸收电极产生将水转化为氧气和氢气所需的电压，可实现比单吸收体系统更高的效率。我们在此报告了一种由染料敏化光电化学电池 (DSPEC) 与染料敏化太阳能电池 (DSC) 串联组成的串联系统的开发。DSPEC 光阳极采用三(联吡啶)钌(II)型发色团和基于分子的 Ru 水氧化催化剂。DSPEC 与两种更红吸收的 DSC 变体进行了测试，一种使用 N719 染料和 I/I 氧化还原介体溶液，另一种使用 D35 染料和基于三(联吡啶)钴([Co(bpy)])的介体。由 DSPEC 和基于 D35/[Co(bpy)]的 DSC 组成的串联配置实现了最佳的整体性能，并证明了仅从模拟太阳光照射输入的能量就可以从 HO 中产生 H。
