A tandem redox system with a cobalt complex and 2-azaadamantane-N-oxyl for fast dye regeneration and open circuit voltages exceeding 1 V

A new tandem electrolyte composed of two redox pairs, the organic radical 2-azaadamantane-N-oxyl (AZ) and the well-known redox pair [Co(bpy)(3)](3+/2+) was investigated in dye sensitized solar cells. Importantly, an increase in V-OC was achieved using the new tandem redox system with values up to 1007 mV, compared to only 896 mV for the reference [Co(bpy)(3)](3+/2+) couple. Consequently, the tandem electrolytes presented higher device performance in conjunction with the organic dye XY1. It was determined that the V-OC improvement is mainly attributed to the combined effect of two factors: the more positive redox potential of the small donor AZ (0.81 V vs. SHE) and improved recombination resistance in the tandem electrolytes.


Published in:
Journal Of Materials Chemistry A, 7, 18, 10998-11006
Year:
May 14 2019
Publisher:
Cambridge, ROYAL SOC CHEMISTRY
ISSN:
2050-7488
2050-7496
Keywords:
Laboratories:




 Record created 2019-07-05, last modified 2019-07-08


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