Abstract
A series of 3-aryl-4-hydroxycyclobut-3-ene-1,2-diones were synthesized and examined as sensitizers for a TiO 2 solar cell. The compounds showed strong affinity for TiO 2 and the fluorescence intensity and self-assembly of the 3-aryl-4-hydroxycyclobut-3-ene-1,2-diones on the TiO 2 surface were important factors in enhancing the solar-light-to-electricity conversion efficiency. The highest efficiency of 0.96% was observed for 3-[4-(didodecylamino)phenyl]-4-hydroxycyclobut-3-ene-1,2-dione.
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