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Phenothiazine dyes and application thereof in dye-sensitized solar cells

A phenothiazine and dye technology is applied to organic photoelectric functional materials and their application in solar cells to achieve the effects of improving morphology, enhancing light absorption capacity and high photoelectric conversion efficiency

Inactive Publication Date: 2020-01-10
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult for existing dyes to meet all or as many of the above requirements as possible. In view of this technical difficulty, we have developed the dye molecule described in the present invention

Method used

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  • Phenothiazine dyes and application thereof in dye-sensitized solar cells
  • Phenothiazine dyes and application thereof in dye-sensitized solar cells
  • Phenothiazine dyes and application thereof in dye-sensitized solar cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: the synthesis of CzPTZ-2 dyestuff

[0030] The phenothiazine dye in this example is CzPTZ-2, and the specific preparation process is as follows:

[0031] 1. Preparation of phenothiazine π bridge:

[0032] Dissolve phenothiazine, hexyl bromide, potassium hydroxide and tetrabutylammonium bromide (TBAB) in dimethyl sulfoxide (DMSO) at a molar ratio of 1:2:3:0.5, and react at room temperature under nitrogen protection After 10 hours, the reaction was quenched and the organic phase was extracted, separated and purified by column chromatography to obtain the intermediate product 1, namely N-hexylphenothiazine; the intermediate product 1 was dissolved in chloroform solvent, and bromosuccinyl was added in three batches Amine (NBS) with a molar ratio of 1:3 was reacted in an ice bath under the protection of nitrogen for 6 hours, the reaction was quenched and the organic phase was extracted, separated and purified by column chromatography to obtain the intermediate...

Embodiment 2

[0040] Embodiment 2: the synthesis of CzPTZ-3 dyestuff

[0041] The phenothiazine dye in this example is CzPTZ-3, and the specific preparation process is as follows:

[0042] 1. Preparation of phenothiazine π bridge:

[0043] Dissolve phenothiazine, hexyl bromide, potassium hydroxide and tetrabutylammonium bromide (TBAB) in dimethyl sulfoxide (DMSO) at a molar ratio of 1:2:3:0.5, and react at room temperature under nitrogen protection After 10 hours, the reaction was quenched and the organic phase was extracted, separated and purified by column chromatography to obtain the intermediate product 1, namely N-hexylphenothiazine; the intermediate product 1 was dissolved in chloroform solvent, and bromosuccinyl was added in three batches Amine (NBS) with a molar ratio of 1:3 was reacted in an ice bath under the protection of nitrogen for 6 hours, the reaction was quenched and the organic phase was extracted, separated and purified by column chromatography to obtain the intermediate...

Embodiment 3

[0051] Embodiment 3: Study the light absorption characteristics of dyes CzPTZ-2 and CzPTZ-3

[0052] Configure 100mL concentration as 10 -5 The DCM solution of CzPTZ-2 and CzPTZ-3 of mol / L, test its ultraviolet-visible light absorption spectrum, see appendix Figure 5 . It can be seen from the figure that the intramolecular charge transfer absorption peaks of the two dyes are both at 479nm, and the cut-off wavelength is about 600nm, which proves that they have good absorption of sunlight.

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Abstract

The invention belongs to the field of organic photoelectric functional materials and application thereof in solar cells, and relates to phenothiazine dyes and application thereof in dye-sensitized solar cells. The phenothiazine dyes disclosed by the invention have a structural general formula shown in the specification of the invention. The dyes provided by the invention have relatively strong light absorption capability; exciton dissociation and dye regeneration can be effectively carried out; a relatively good intermolecular aggregation form and a relatively good adsorption form can be formed; a dye synthesis method provided by the invention is simple, controllable and low in cost, and higher photoelectric conversion efficiency is obtained when the phenothiazine dyes are applied to dye-sensitized solar cell devices.

Description

technical field [0001] The invention belongs to the field of organic photoelectric functional materials and their application in solar cells, and relates to a class of phenothiazine dyes and their application in dye-sensitized solar cells. Background technique [0002] Dye-sensitized solar cells (DSSCs) are representative of the third generation of solar cells, and have been widely studied because of their simple preparation process, low cost and environmental friendliness. [0003] The traditional DSSC structure mainly consists of a TiO photoanode, a dye sensitizer, a redox electrolyte, and a counter electrode. Among the above components, the dye sensitizer plays the role of light harvesting and plays a crucial role in the final efficiency of DSSC devices. Dyes fall into two broad categories, namely metallic dyes and purely organic dyes. In the former, ruthenium dye is taken as an example. Although DSSC devices based on it have achieved high efficiency, its commercial app...

Claims

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Application Information

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IPC IPC(8): C09B21/00H01G9/20H01G9/042
CPCC09B21/00H01G9/2059Y02E10/542
Inventor 焦云飞刘帅帅丁永杰密保秀高志强黄维
Owner NANJING UNIV OF POSTS & TELECOMM
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