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Thiocyanate-free photosensitizer and dye-sensitized solar cell

A technology for solar cells and sensitizing dyes, which is applied in the field of photosensitizers and sensitizing dyes to solar cells, can solve problems such as poor matching, poor spectral response, and weak coordination bond strength, and achieve the best overall performance of battery components , the effect of high photoelectric conversion efficiency

Inactive Publication Date: 2013-09-11
NATIONAL TSING HUA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the absorption spectrum range of N719 dye does not match well with the solar spectrum, and its spectral response to wavelengths beyond 600nm is poor, so it cannot effectively utilize the solar light energy in this band
In addition, in the existing N719 dye, due to the thiocyanate anion (NCS - , thiocyanate) ligands have weak coordination bond strength

Method used

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  • Thiocyanate-free photosensitizer and dye-sensitized solar cell
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  • Thiocyanate-free photosensitizer and dye-sensitized solar cell

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In a preferred embodiment, the photosensitizer of the present invention has chemical formula (t), wherein, R in the photosensitizer TFRS-1 is a hydrogen atom; R in the photosensitizer TFRS-2 ​​is 5-hexylthiophene (5-hexylthiophene ); R in the photosensitizer TFRS-3 is 5-hexyl[2,2']bithiophene (5-hexyl[2,2']bithiophene).

[0052]

[0053] formula (t)

[0054] Photosensitizers TFRS-1, TFRS-2 ​​and TFRS-3 can be prepared by the following equation:

[0055]

[0056] Specifically, in the synthesis of TFRS-1, 2-(3-(trifluoromethyl)-1H-pyrazol-5-yl)pyridine (45mg, 0.21mmol) and Ru(diethyl2,2'-bipyridine-4,4' -dicarboxylate)(p-cymene)Cl (60mg, 0.10mmol) was dissolved in 2-methoxyethanol (20mL) solvent and refluxed at 130°C for 12 hours. Then use a vacuum system to dry the solvent, dissolve the solid with dichloromethane, wash it three times with deionized water, take the organic layer, dry it, and then use a rotary concentrator to dry the organic solvent, and wash it wi...

Embodiment 2

[0063]

[0064] formula (m)

[0065] Specifically, in the synthesis of compound (m), Dichloro(p-cymene)ruthenium(II) (75mg, 0.117mmol) and 4,4'-bis(ethoxycarbonyl)-2,2'-bipyridine (146mg, 0.487 mmol) was dissolved in DMF and heated at 140°C for 3 hours, then 2-(3-(trifluoromethyl)-1H-pyrazol-5-yl)pyridine (49mg, 0.230mmol) was added to continue the reaction and heated at 140°C for 12 hours. After the reaction, use a vacuum system to dry the solvent, dissolve the solid with dichloromethane, wash it three times with deionized water, take the organic layer, dry it and then use a rotary concentrator to dry the organic solvent, and then use CH 2 Cl 2 :ACN=4:1 to carry out column separation to obtain the product. Finally, the solid was dissolved in acetone and 1M NaOH solution (1 mL) was added. Hydrolysis was carried out by heating at 100° C. for 3 hours under nitrogen. After the reaction, remove the organic solvent, add 10 mL of deionized water, use 0.1M HNO 3 The pH of the...

Embodiment 3

[0068]

[0069] Formula (n)-1

[0070]Specifically, in the synthesis of compound (n)-1, Dichloro-4, 4'-bis(ethoxycarbonyl)-2,2'-bipyridine-ruthenium (II) compound (100mg, 0.129mmol) and 3,5- bis(trifluoromethl)-2-(2'-pyridyl)pyrrol (42mg, 0.150mmol) was dissolved in Ethanol (20mL) solvent and refluxed at 100°C for 14 hours. After the reaction, the solid was filtered off, and then the solvent was drained with a vacuum system, the solid was dissolved in dichloromethane, washed three times with deionized water, the organic layer was taken, dried, and then the organic solvent was drained with a rotary concentrator. 2 Cl 2 : MeOH = 9: 1 for column separation to obtain the product. Finally, the solid was dissolved in acetone and 1M NaOH solution (1 mL) was added. Hydrolysis was carried out by heating at 100° C. for 3 hours under nitrogen. After the reaction, remove the organic solvent, add 10 mL of deionized water, use 0.1M HNO 3 The pH of the solution was adjusted to 3, at ...

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Abstract

The invention relates to a thiocyanate-free photosensitizer and a dye-sensitized solar cell. The thiocyanate-free photosensitizer comprises a chemical formula represented by a formula (a): RuL1L2L3. In the formula (a), Ru is ruthenium, L1, L2 and L3 are bidentate heterocyclic ligands, wherein the L1 has a structure represented by a formula (b), the L2 has a structure represented by the formula (b), a formula (c), a formula (d) or a formula (e), the L3 has a structure represented by the formula (c), the formula (d) or the formula (e). In the formula (b), the formula (c), the formula (d) and the formula (e), R1 to R18 are selected from hydrogen atom, halogen, aryl, alkenyl, alkyl containing 1-20 carbon atoms, naphthenic base, alkynyl, cyano, fluoromethane base, alkylamino, amide, alkoxy, heteroaryl, halogen substituted aryl, halogen substituted aralkyl, alkyl halide substituted aryl, alkyl halide substituted aralkyl, and alkyl with aryl and 1-20 carbon atoms, and one of the groups comprising the compositions. The photosensitizer can be adopted as the dye sensitizer for preparing the dye-sensitized solar cell.

Description

technical field [0001] The invention relates to a photosensitizer and its sensitized dye solar cell, in particular to a photosensitizer with better photoelectric conversion efficiency and its sensitized dye solar cell. Background technique [0002] Since fossil fuels are disposable energy sources, not only are they likely to be exhausted, but the waste gas emitted from the use of fossil fuels also causes air pollution, and is even one of the culprits of global warming. Therefore, seeking alternative energy sources to reduce dependence on fossil fuels is an urgent issue at present. In the development of green energy, the source of solar energy is the cleanest and most abundant, and does not need to be mined or refined. Therefore, solar energy has become the most active field in the development and utilization of new energy. [0003] The process of sensitized dye solar cell (dye-sensitized solar cell, DSSC) is simple, and the manufacturing cost is lower than the existing sili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B57/10H01G9/20H01M14/00H01L51/42
CPCY02E10/542Y02E10/549
Inventor 季昀陈凯伦许惠筑吴冠霖
Owner NATIONAL TSING HUA UNIVERSITY