Near-infrared wide-spectrum metal complex dye and preparation method thereof

A metal complex and wide-spectrum technology, applied in the field of dye-sensitized solar cells, can solve the problems of less dyes and low absorption capacity, and achieve the effect of increasing the spectral response range and improving the photoelectric conversion efficiency

Inactive Publication Date: 2014-07-30
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the performance of complex dyes in the visible light range is superior, there are few dyes with absorption capacity in the near infrared band, and there is a problem of low absorption capacity

Method used

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  • Near-infrared wide-spectrum metal complex dye and preparation method thereof
  • Near-infrared wide-spectrum metal complex dye and preparation method thereof
  • Near-infrared wide-spectrum metal complex dye and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] dye-1: Ru(bpy) 2 (Bibz)(tcpy)(SCN)Ru

[0042] The structure of dye-1 is The metal ion is Ru, and the ligand structure around the metal ion is and Two types, where the ligand structure There are no R, R' substituents, R 1 , R 2 , R 3 is a carboxyl substituent; the bridging ligand is Type, the bridging ligand does not have R, R' substituents.

[0043] Although the ligand structure in this example There are no R, R' substituents, however, in similar structures, the R, R' substituents of the dye can be carboxyl (-COOH), and other structures, where R 1 , R 2 , R 3 , R 4 , R 4’ Can be -X, Me-, MeO-, -COOH, -SO 3 H. At least one of them, X can be any one of F, Cl, Br, I; or the R, R' substituent of the dye has no R 1 , R 2 , R 3 , R 4 , R 4’ substituent group.

[0044] metal ligand structure The substituent R 1 , R 2 , R 3 Can also be -X, Me-, MeO-, -COOH, -SO 3 H. At least one of, X is any one of F, Cl, Br, I; R 1 , R 2 , R 3 It ...

Embodiment 2

[0051] dye-2: [Os(bpy) 2 (Bi)(dcbpy) 2 Os]Cl 4

[0052] The structure of dye-2 is The metal ion is Os, and the ligands around the metal ion are type, and some ligands contain carboxyl substituents, and some have no substituents; the bridging ligands are type, and the bridging ligand has no substituents. Although the bridging ligand has no substituents in this example, in a similar structure, R and R' of this type of bridging ligand can be Any one of them, and the bridging ligand can have one, two, three or four R or R' substituents, wherein R 1 , R 2 , R 3 , R 4 , R 4’ The substituents are the same as in Example 1.

[0053] Dye [Os(bpy) 2 (Bi)(dcbpy) 2 Os]Cl 4 The synthetic route of Figure 4 Shown, its preparation method is as follows:

[0054] ⑴.[Os(bpy) 2 (BiH 2 )] 2+ The synthesis of: under Ar gas conditions, add Os(bpy) in the flask 2 Cl 2 2H 2 O (0.19mmol) and BiH 2 (0.19mmol), then add 30ml of ethanol and water mixture (volume ratio = 1:1), an...

Embodiment 3

[0058] Dye-3: Ru(tcpy)(dpdpz)(bpy) 2 Ru

[0059] The structure of dye-3 is Its metal ion ligand is the same as dye-1, and its bridging ligand is type, and the bridging ligand has no substituents.

[0060] Bridging ligands with similar structures can also be

[0061] Dye Ru(tcpy)(dpdpz)(bpy) 2 The synthetic route of Ru is as follows Figure 5 Shown:

[0062] ⑴. Synthesis of Ru(tm-tcpy)(dpdpz)Cl: Add Ru(tm-tcpy)Cl to the flask under Ar gas condition 3(0.19mmol) and dpdpz (0.19mmol), then add 30ml of a mixture of ethanol and water (volume ratio = 3:1), add 1ml of triethylamine under stirring, and reflux for more than 12 hours. After the reaction, the solution is brown-black , spin-dried, and can be directly used in the next step without purification.

[0063] ⑵Ru(tm-tcpy)(dpdpz)(bpy) 2 Synthesis of Ru: Dissolve an appropriate amount of Ru(bpy)2Cl2 in 30ml of acetone, add an appropriate amount of AgClO4 under Ar gas, then reflux for 2 hours, filter after cooling, and ...

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Abstract

The invention discloses a near-infrared wide-spectrum metal complex dye. The structural formula of dye molecules is [M<m+>-BL-M<n+>], wherein a metal ion M forms a metal building block with surrounding ligands; BL is a bridging ligand; a delocalized pai orbit is formed between the metal building block and the bridging ligand; the bridging ligand has good conjugation performance and electronic conductivity; the charge distribution of the dye molecules is completely delocalized; when the metal building block receives energy stimulation, a strong valence state transition effect is generated in the dye molecules, and can be used for broadening the absorption range of a dye spectrum and ensuring that an absorption spectrum is red-shifted to a near-infrared area. The near-infrared wide-spectrum metal complex dye disclosed by the invention can be applied to dye-sensitized solar cells, and can be used for increasing the spectral response range of the sensitized solar cells, thus improving the photoelectric conversion efficiency of cells.

Description

technical field [0001] Embodiments of the present invention relate to the field of dye-sensitized solar cells, and more specifically, embodiments of the present invention relate to a near-infrared broad-spectrum metal complex dye and a preparation method thereof. Background technique [0002] Dye-Sensitized Solar Cells (DSSCs) is a new type of solar cell developed by imitating the principle of photosynthesis. Its main advantages are: abundant raw materials, low cost, and relatively simple process technology. At the same time, all raw materials and production processes They are all non-toxic and non-polluting. In 1991, M. The research team led by the professor made nanocrystalline TiO 2 The use of porous thin films in dye-sensitized solar cells has substantially improved the photoelectric conversion efficiency of such cells. In the past two decades, countries around the world have invested a lot of money in the research and development of dye-sensitized solar cells. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B57/00H01G9/20
CPCY02B10/10Y02E10/542C09B15/00C09B17/06C09B57/10C09B1/00H01G9/2059Y02E10/549H10K85/348H10K85/344H10K85/361
Inventor 徐海兵焦鹏冲张衍邓建国
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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