Abstract
A critical factor that influences the performance of heteroleptic copper(I) bis(diimine) dyes in dye-sensitized solar cells (DSSCs) is shown to be the concentration of solution of the homoleptic copper(I) bis(diimine) complex used during the stepwise assembly of the dye on the semiconductor surface. The performance of the heteroleptic dye [Cu(1)(2)]+ (1 = ((6,6′-dimethyl-[2,2′-bipyridine]-4,4′-diyl)bis(4,1-phenylene))bis(phosphonic acid); 2 = 4,4′-(6,6′-dimethyl-[2,2′-bipyridine]-4,4′-diyl)bis(N,N-bis(4-methoxyphenyl)aniline) is investigated as a function of the concentration of [Cu(2)2][PF6] which undergoes ligand exchange with TiO2-anchored 1. With 0.1 mM solutions of [Cu(2)2][PF6], optimal performance is reached on the day of fabricating the DSSC. Solar cells made using more concentrated solutions of [Cu(2)2][PF6] show a ripening effect and require increasing times (up to 4 days) to reach their optimal performance.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
