On how ancillary ligand substitution affects the charge carrier dynamics in dye-sensitized solar cells

With respect to N3, a champion sensitizer in dye-sensitized solar cells (DSSCs), S3 which contained a phenTz (1,10-phenanthroline 5-tetrazole) ancillary ligand showed outstanding improvements in molar extinction coefficient ( ) from 10 681.8 to 12 954.5 M cm as well as 0.92% and 0.9% increases in po...

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Bibliographic Details
Published in:RSC advances 2018-01, Vol.8 (35), p.19465-19469
Main Authors: Shahroosvand, Hashem, Abaspour, Saeid, Pashaei, Babak, Bideh, Babak Nemati
Format: Article
Language:English
Subjects:
Chemistry
Current carriers
Dye-sensitized solar cells
Dyes
Energy conversion efficiency
Ligands
Photovoltaic cells
Regeneration
Substitution reactions
Tetrazoles
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Summary:With respect to N3, a champion sensitizer in dye-sensitized solar cells (DSSCs), S3 which contained a phenTz (1,10-phenanthroline 5-tetrazole) ancillary ligand showed outstanding improvements in molar extinction coefficient ( ) from 10 681.8 to 12 954.5 M cm as well as 0.92% and 0.9% increases in power conversion efficiency (PCE) and incident photon-to-electron conversion efficiency (IPCE), reaching 8.46% and 76.5%, respectively. To find the origin of the high performance of the DSSC based on a phenTz ancillary ligand, transient absorption spectroscopy (TA) was carried out and indicated that the rate of the regeneration reaction is about 100 times faster than the rate of recombination with the dye which is very exciting and surely a good reason to promote the phenTz ligand as a promising ancillary ligand in DSSCs.
ISSN:2046-2069
2046-2069
DOI:10.1039/c8ra02968g