Triphenyl amine dyes for dye-sensitized solar cells

A technology for solar cells and dye sensitization, applied in the field of dye-sensitized solar cells, can solve the problems of inability to popularize and expensive sensitizers, etc., and achieve the effects of excellent optoelectronic performance, low cost, and rich research content.

Inactive Publication Date: 2009-02-11
NANKAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing noble metal-containing complex sensitizers are expensive and cannot be popularized, and to provide a novel triphenylamine-based dye containing electron-rich groups and its application in dye-sensitized solar cells

Method used

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  • Triphenyl amine dyes for dye-sensitized solar cells
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  • Triphenyl amine dyes for dye-sensitized solar cells

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: the synthesis of triphenylamine-based dyes

[0026] The synthetic route is as follows:

[0027]

[0028] In a three-necked flask equipped with a drying tube, add 5.11 g (21.5 mmol) of triphenylamine and 25 mL of dry N,N-dimethylformamide (DMF), and cool in an ice-salt bath. Slowly add POCl dropwise at 0°C 3 21 mL (35.16 g, 269.4 mmol). After the dropwise addition was completed, the temperature was raised to 90-105° C., and the reaction was stirred for 8 hours. Cool to room temperature after the reaction, pour the crude product into 60 mL of ice water, add dropwise 20% NaOH aqueous solution to adjust the pH value to 6-8, stir, and filter to obtain a khaki solid. use CH 2 Cl 2 Dissolve the solid crude product, add anhydrous NaSO 4 Let dry overnight. The solvent was evaporated by rotary evaporation and purified by column chromatography (petroleum ether::dichloromethane:ethyl acetate=7:3:1 as eluent, R f =0.4), to get earthy yellow substance triphe...

Embodiment 2

[0031] Embodiment 2: to the test of the ultraviolet-visible absorption spectrum / fluorescence spectrum of dyestuff in embodiment 1

[0032] The triphenylamine dye that embodiment 1 prepares is mixed with 5 * 10 -5 The methanol solution of mol / L adopts Japan Jasco V-550 ultraviolet-visible spectrophotometer to carry out the test of absorption spectrum (see Figure 1a ). Carry out the fluorescence test by adopting American Cary Eclipse fluorescence spectrophotometer (see Figure 1b ). The ultraviolet absorption spectrum of the triphenylamine-based dye-sensitized titanium dioxide film electrode (see figure 2 ) test using the same instrument. The test of the adsorption amount of triphenylamine-based organic dyes adsorbed on the titanium dioxide film is that the dye-sensitized TiO 2 The nanocrystalline film was soaked in 10mL 0.01mol / L sodium hydroxide methanol solution overnight, and the absorbance of the solution was measured after the dye was completely desorbed; the adsorpt...

Embodiment 3

[0036] Embodiment 3: to the estimation of electrochemical test and HOMO and LUMO energy level of the dyestuff in embodiment 1

[0037] Differential pulse voltammetry (DPV) was used to test the redox potential of the dye in the ground state, and the instrument used was the PARSTAT 2273 electrochemical workstation in the United States. The electrolyte used in the test is acetonitrile solvent, with 0.1mol / L tetrabutylammonium perchlorate as the supporting electrolyte. The test uses a three-electrode system: glassy carbon electrode as the working electrode; platinum wire electrode as the counter electrode; Ag / AgNO 3 (acetonitrile) as a reference electrode, the calibration of which is carried out by measuring the redox potential of ferrocene in acetonitrile. The measured redox potential was converted to a value relative to a standard hydrogen electrode (vs. NHE), which determined the HOMO level of the dye. The LUMO energy level of the dye is given by the formula LUMO=HOMO—E 0-0 ...

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Abstract

The invention belongs to the technical field of solar batteries, which more particularly relates to a preparation of a novel triphenylamine group organic dye and the application thereof as a photosensitizer in a dye-sensitized solar cell. The triphenylamine group organic dye provided by the invention has excellent light-capturing capacity; the D-Pi-A molecular structure thereof causes the effective transferring of the electrons in the molecule. The titanium dioxide electrode sensitized by the dye is applied to the dye-sensitized solar cell and obtains a higher photoelectric conversion property. The novel triphenylamine group organic dye provided by the invention is novel in structure, is easy to be composed, is low in cost, and has excellent photoelectric properties, can be modified by molecule designing and shows a potential application prospect to replace a heavy metal organic photosensitizer.

Description

【Technical field】: [0001] The invention relates to the application field of photoelectric conversion materials, in particular to a triphenylamine dye used in a dye-sensitized solar cell and a dye-sensitized solar cell prepared from the dye. 【Background technique】: [0002] Low-cost dye-sensitized solar cells (Dye-sensitized Solar Cells, DSCs) developed based on nanocrystalline semiconductors were developed by Swiss M.Gr. Professor tzel first proposed (O'Regan, B.; Gratzel, M. Nature1991, 353, 737.). The structure of DSCs is simple, it is mainly composed of working electrode, electrolyte and counter electrode. A layer of nanoporous titanium dioxide film is sintered on a conductive glass substrate, and a photosensitive dye is adsorbed on it as a working electrode; the electrolyte can be liquid, quasi-solid or solid; the counter electrode is generally a conductive material coated with a layer of Pt. Glass. Among them, photosensitizing dyes, which are important components of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B23/14H01G9/20H01G9/022H01G9/04
CPCY02E10/542
Inventor 陈军裴娟梁衍亮陶占良梁静高峰
Owner NANKAI UNIV
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