HETEROLEPTIC, DUAL TRIDENTATE RU(II) COMPLEXES AS SENSITIZERS FOR DYE-SENSITIZED SOLAR CELLS

• US 20120073660A1
• Filed: 12/13/2010
• Published: 03/29/2012
• Est. Priority Date: 09/28/2010
• Status: Active Grant

• Current Assignee: National Tsing Hua University
• Original Assignee: National Tsing Hua University
• Inventors: CHI, Yun, WU, Kuan-Lin, CHOU, Chun-Cheng
• Granted Patent: US 8,507,679 B2
• Time in Patent Office: Days
• US Class Current: 136/263
• CPC Class Codes: C07F 15/0046 Ruthenium compounds
• CPC Class Codes: C07F 15/0053 without a metal-carbon linkage
• CPC Class Codes: H01G 9/2031 comprising titanium oxide, e.g. TiO2 H01G9/2036 takes precedence
• CPC Class Codes: H01G 9/2059 comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution
• CPC Class Codes: H10K 85/344 comprising ruthenium
• CPC Class Codes: H10K 85/636 comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/655 comprising only sulfur as heteroatom
• CPC Class Codes: Y02E 10/542 Dye sensitized solar cells
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

Photosensitizers having a formula of RuL₁L₂ (1) are provided, wherein Ru is ruthenium; L₁ and L₂ are heterocyclic tridentate ligands. L₁ has a formula of (2), and L₂ has a formula of G₁G₂G₃ (3), wherein G₁ and G₃ are selected from the group consisting of formulae (4) to (7), and G₂ is selected from the group consisting of formulae (7) and (8). The above-mentioned photosensitizers are suitable to be used as sensitizers for fabrication of high efficiency dye-sensitized solar cells.

Claims

1. A heteroleptic, dual tridentate Ru(II) complex having a formula of (1):

RuL₁L₂ 

 

(1)

, wherein Ru is ruthenium, L₁ and L₂ are heterocyclic tridentate ligands;

L₁ has a formula of (2);

2. The heteroleptic, dual tridentate Ru(II) complex as claimed in claim 1, wherein L₁ is 4,4′

,4″

-tricarboxy-2,2′

;

6′

,2″

-terpyridine.

3. The heteroleptic, dual tridentate Ru(II) complex as claimed in claim 1, wherein L₂ is selected from the group consisting of formulae (9) to (14):

4. The heteroleptic, dual tridentate Ru(II) complex as claimed in claim 1, wherein L₂ is selected from the group consisting of formulae (15) and (16):

5. The heteroleptic, dual tridentate Ru(II) complex as claimed in claim 4, wherein R₄ is heteroaryl or aryl.

6. The heteroleptic, dual tridentate Ru(II) complex as claimed in claim 5, wherein R₄ is selected from the group consisting of following formulae:

7. A dye-sensitized solar cell comprising:

a first electrode comprising;

a transparent conductive substrate; and

a porous membrane comprising a semiconductor material, disposed on a surface of said transparent conductive substrate, and loaded with photosensitizers;

a second electrode; and

an electrolyte, disposed between said porous membrane and said second electrode, wherein said photosensitizers comprising a chemical formula represented by formula of (1);

RuL₁L₂ 

 

(1)

wherein Ru is ruthenium, L₁ and L₂ are heterocyclic tridentate ligands;

L₁ has a formula of (2)

8. The dye-sensitized solar cell as claimed in claim 7, wherein L₁ is 4,4′

,4″

-tricarboxy-2,2′

;

6′

,2″

-terpyridine.

9. The dye-sensitized solar cell as claimed in claim 7, wherein L₂ is selected from the group consisting of formulae (9) to (14):

10. The dye-sensitized solar cell as claimed in claim 7, wherein L₂ is selected from the group consisting of formulae (15) and (16):

11. The dye-sensitized solar cell as claimed in claim 10, wherein R₄ is heteroaryl or aryl.

12. The dye-sensitized solar cell as claimed in claim 11, wherein R₄ is selected from the group consisting of following formulae:

13. The dye-sensitized solar cell as claimed in claim 7, wherein the material of said semiconductor comprises TiO₂.

14. The dye-sensitized solar cell as claimed in claim 7, wherein said transparent conductive substrate comprises FTO glass.