Bis(1, 1-bis(2-pyridyl)ethane)copper(i/ii) as an efficient redox couple for liquid dye-sensitized solar cells. Issue 38 (15th September 2016)

• Record Type: Journal Article
• Authors: Cong, Jiayan; Kinschel, Dominik; Daniel, Quentin; Safdari, Majid; Gabrielsson, Erik; Chen, Hong; Svensson, Per H.; Sun, Licheng; Kloo, Lars
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 38(2016)
• Page Start: 14550
• Page End: 14554
• Publication Date: 2016-09-15
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta06782d
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A new redox couple, [Cu(bpye)2 ] +/2+, has been synthesized and applied in DSSCs. Overall efficiencies above 9.0% and good photostability were obtained. Excellent electrolyte charge transport, fast regeneration and low recombination are the major reasons for the high efficiencies. Abstract : A new redox couple, [Cu(bpye)2 ] +/2+, has been synthesized, and applied in dye-sensitized solar cells (DSSCs). Overall efficiencies of 9.0% at 1 sun and 9.9% at 0.5 sun were obtained, which are considerably higher than those obtained for cells containing the reference redox couple, [Co(bpy)3 ] 2+/3+ . These results represent a record for copper-based complex redox systems in liquid DSSCs. Fast dye regeneration, sluggish recombination loss processes, faster electron self-exchange reactions and suitable redox potentials are the main reasons for the observed increase in efficiency. In particular, the main disadvantage of cobalt complex-based redox couples, charge-transport problems, appears to be resolved by a change to copper complex redox couples. The results make copper complex-based redox couples very promising for further development of highly efficient DSSCs.