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US 10,475,593 B2Granted
Use of halogen derivatives of histidine as electrolytic salt in a photovoltaic dye cell
AssigneesCentre National De La Recherche Scientifique, Universite De Picardie Jules Verne
InventorsIryna Sagaidak, Miguel Flasque, Frédéric Sauvage, Albert Nguyen Van Nhien
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Abstract
The invention relates to the use of halogenated histidine derivatives as electrolyte salts in the preparation of an electrolyte composition in a photoelectrochemical cell based on the sensitization to light of photoactive molecules, and also to a photoelectrochemical cell based on the sensitization to light of photoactive molecules comprising an electrolyte composition comprising at least one halogenated histidine derivative as electrolyte salt.
Claims17
An electrolyte composition comprising an electrolyte salt of following formula (I):
- in which:
- R1 represents a hydrogen atom or a linear alkyl radical having from 1 to 10 carbon atoms;
- R2 and R4, which are identical or different, each represent a linear or branched alkyl radical having from 1 to 15 carbon atoms, said alkyl radical optionally being substituted by one or more C6-C20 aryl groups which can optionally comprise one or more heteroatoms chosen from oxygen, sulfur and nitrogen atoms;
- R3 represents a hydrogen atom or a linear or branched alkyl radical having from 1 to 15 carbon atoms,
- X− represents an iodide or bromide anion,
- wherein said electrolyte salt is configured to be included in an electrolyte composition of a photoelectrochemical cell based on the sensitization to light of photoactive molecules,
- and one or more additives intended to improve the performance of the photoelectrochemical cell chosen from benzimidazole derivatives;
- pyridine derivatives;
- triazole derivatives;
- pyrazole derivatives;
- imidazole derivatives;
- guanidine thiocyanate;
- chenodeoxycholic acid;
- magnesium iodide;
- and alkali metal salts of formula LiY or NaY in which Y is an I−, Br−, trifluorosulfonate, ClO4−, NO3− or TFSI− anion.
12 more elements
A photoelectrochemical cell based on the sensitization to light of photoactive molecules comprising:
- an assembly forming a photoelectrode comprising:
- i) a transparent substrate coated with a layer of a transparent and conducting electrode material,
- ii) a photoactive layer formed on said electrode material, said photoactive layer comprising a transparent carrier material and at least one photoactive molecule;
- an assembly forming a counterelectrode;
- and
- an electrolyte composition interposed between said photoactive layer and said counterelectrode, said electrolyte composition comprises, in an electrolyte solvent, a reversible redox pair (I3−/I−) based on molecular iodine and on at least one compound of formula (I)
- in which:
- R1 represents a hydrogen atom or a linear alkyl radical having from 1 to 10 carbon atoms;
- R2 and R4, which are identical or different, each represent a linear or branched alkyl radical having from 1 to 15 carbon atoms, said alkyl radical optionally being substituted by one or more C6-C20 aryl groups which can optionally comprise one or more heteroatoms chosen from oxygen, sulfur and nitrogen atoms;
- R3 represents a hydrogen atom or a linear or branched alkyl radical having from 1 to 15 carbon atoms, and
- X− represents an iodide or bromide anion.
8 more elements
A compound of the following formula (I′):
- in which:
- R1 represents a hydrogen atom or a linear alkyl radical having from 1 to 10 carbon atoms,
- R2 and R4, which are identical or different, each represent a linear or branched alkyl radical having from 1 to 15 carbon atoms, said alkyl radical optionally being substituted by one or more C6-C20 aryl groups which can optionally comprise one or more heteroatoms chosen from oxygen, sulfur and nitrogen atoms,
- R3 represents a hydrogen atom or a linear or branched alkyl radical having from 1 to 15 carbon atoms,
- X− represents an iodide or bromide anion,
- wherein:
- when X− represents an iodide anion, when R1 represents a methyl radical and when R3 is a hydrogen atom, then the R2 and R4 radicals cannot simultaneously represent a methyl radical or an ethyl radical,
- when X− represents a bromide anion, when R1 represents a methyl radical and when R3 is a hydrogen atom, then the R2 and R4 radicals cannot simultaneously represent a benzyl radical,
- when X− represents a bromide anion, when R1 represents a methyl radical, when R2 is a butyl radical and when R3 is a hydrogen atom, then the R4 radical is other than a methyl, ethyl or benzyl radical,
- when X− represents an iodide anion, when R1 and R2 represent a methyl radical and when R3 is a hydrogen atom, then the R4 radical is other than a trityl radical, and
- when X− represents a bromide anion, when R1 represents a methyl radical, when R2 is a butyl radical and when R3 is an isopropyl radical, then the R4 radical is other than a methyl radical.
8 more elements
Dependencies are inferred from the claim text.