AI Article Synopsis
- An efficient organic sensitizer called JK-306 was synthesized for use in dye-sensitized solar cells, featuring a unique structure that enhances light absorption and photocurrent generation.
- The incorporation of a bulky amino group in the sensitizer's design helps reduce charge recombination and prevents the sensitizer from aggregating, leading to better performance.
- The JK-306-sensitized solar cells achieved impressive conversion efficiencies of up to 10.02% using a cobalt-based electrolyte, marking one of the highest efficiencies for this type of solar cell with organic sensitizers.
Article Abstract
An efficient organic sensitizer (JK-306) featuring a planar indeno[1,2-b]thiophene as the π-linker of a bridging unit for dye-sensitized solar cells (DSSCs) was synthesized. The sensitizer had a strong molar absorption coefficient and a red-shifted absorption band compared with JK-305, which resulted in a significant increase in the short-circuit photocurrent density. We incorporated a highly congested bulky amino group into the 2',4'-dihexyloxybiphenyl-4-yl moiety, an electron donor, to diminish the charge recombination and to prevent aggregation of the sensitizer. Under standard AM 1.5G solar conditions, JK-306-sensitized cells in the presence of co-adsorbents chenodeoxycholic acid (CDCA) and 4-[bis(9,9-dimethyl-9H-fluoren-2-yl)amino]benzoic acid (HC-A), which afforded an overall conversion efficiency of 8.37% and 8.52%, respectively. Upon changing the I(-) /I3 (-) electrolyte to the Co(II) /Co(III) redox couple, the cell gave rise to a significantly improved conversion efficiency of 10.02% with the multifunctional HC-A, which is one of the highest values reported for DSSCs with a cobalt-based electrolyte. Furthermore, the JK-306-based solar cell with a polymer gel electrolyte revealed a high conversion efficiency of 7.61%, which is one of the highest values for cells based on organic sensitizers.
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| http://dx.doi.org/10.1002/cssc.201300281 | DOI Listing |
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