Organic dye for dye-sensitized solar cell

Patent metadata

Field	Value
Publication number	US-10465073-B2
Application number	US-201415036277-A
Country	US
Kind code	B2
Filing date	Nov 14, 2014
Priority date	Nov 15, 2013
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

An organic dye for a dye-sensitized solar cell (DSSC) comprising at least one electron-acceptor unit and at least one π-conjugated unit is described. Said organic dye is particularly useful in a dye-sensitized photoelectric transformation element which, in its turn, can be used in a dye-sensitized solar cell (DSSC).

First claim

The invention claimed is:

1. An organic dye having formula (I):

wherein:
T 1 is a thiophenyl group of formula (II):

wherein R 4 and R 5 equal to or different from each other, represent a hydrogen atom; or are selected from C 1 -C 20 alkyl, linear or branched, saturated or unsaturated;
T 2 is a 2,2′:5′,2″-terthiophenyl group of formula (IV):

wherein R 11 , R 13 , R 14 and R 16 , equal to or different from each other, represent a hydrogen atom; or are selected from C 1 -C 20 alkyl, linear or branched, saturated or unsaturated; R 12 and R 15 , equal to or different from each other, are selected from C 1 -C 20 alkyl, linear or branched, saturated or unsaturated;

R 1 is a hydrogen atom; or is selected from C 1 -C 20 alkyl groups, linear or branched, saturated or unsaturated;
R 2 and R 3 are bound to each other to form, together with the other atoms to which they are bound, a saturated cycle containing 4 carbon atoms and two heteroatoms;
A is a carboxycyanovinylene group having formula (V):

wherein R 17 represents a hydrogen atom;
X and Y, equal to or different from each other, represent oxygen or sulphur;
n is 1;
m is 0 or 1;
p is 0 or 1; and
m+p is 1 or 2.

2. The organic dye according to claim 1 , wherein R 4 and R 5 represent a hydrogen atom.

3. The organic dye according to claim 1 , wherein R 11 , R 13 , R 14 , and R 16 represent a hydrogen atom.

4. The organic dye according to claim 1 , wherein R 12 and R 15 are a n-hexyl group.

5. The organic dye according to claim 1 , wherein R 1 is a hydrogen atom or a n-hexyl group.

6. The organic dye according to claim 1 , wherein R 2 and R 3 are bound to each other to form, together with the other atoms to which they are bound, a saturated cycle containing 4 carbon atoms and two heteroatoms, said heteroatoms being oxygen or sulphur.

7. The organic dye according to claim 1 , wherein the dye is free of metal.

8. A dye-sensitized photoelectric transformation element comprising at least one organic dye having formula (I) according to claim 1 , said dye-sensitized photoelectric transformation element being supported on oxide semiconductor particles.

9. A dye-sensitized solar cell comprising the dye-sensitized photoelectric transformation element according to claim 8 .

10. The dye-sensitized solar cell according to claim 9 , wherein a photoelectric transformation efficiency (η) of the dye-sensitized solar cell is greater than or equal to 7.5%.

Assignees

• Eni Spa
• Centre Nat Rech Scient

Inventors

• Biagini Paolo
• Po' Riccardo
• Roncali Jean
• Demeter Dora

Classifications

• C09B23/102 Primary

  two heterocyclic rings linked carbon-to-carbon (C09B7/00 takes precedence) · CPC title

• H01G9/2027

  comprising an oxide semiconductor electrode · CPC title

• Y02E10/542

  Dye sensitized solar cells · CPC title

• H01G9/2059

  comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution · CPC title

• Y02E10/549

  Organic PV cells · CPC title