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Iron Redox Shuttles with Wide Optical Gap Dyes for High–Voltage Dye–Sensitized Solar Cells

Journal Article · · ChemSusChem

A series of iron polypyridyl redox shuttles were synthesized in the 2+ and 3+ oxidation states and paired with a series of wide optical gap organic dyes with weak aryl ether electron donating groups. High voltage dye-sensitized solar cell (HV-DSC) devices were obtained through controlling the redox shuttle energetics and dye donor structure. Here, the use of aryl ether donor groups in place of commonly used aryl amines allowed for the lowering of the dye ground-state oxidation potential which enabled challenging to oxidize redox shuttles based on Fe2+ polypyridyl structures to be used in functional devices. By carefully designing a dye series that varies the number of alkyl chains for TiO2 surface protection, the recombination of electrons in TiO2 to the oxidized redox shuttle could be controlled— leading to HV-DSC devices of up to 1.4 V.

Research Organization:
Univ. of Mississippi, Oxford, MS (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); NSF
Grant/Contract Number:
SC0019131
OSTI ID:
1872895
Alternate ID(s):
OSTI ID: 1812844
OSTI ID: 1852856
Journal Information:
ChemSusChem, Journal Name: ChemSusChem Journal Issue: 15 Vol. 14; ISSN 1864-5631
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English

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