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D-A-pi-A three-dimensional phenothiazine dye sensitizer, preparation method and application thereof

A technology of dye sensitizers and phenothiazines, which is applied in the field of solar cells, can solve problems such as energy shortage and environmental pollution, achieve the effects of inhibiting dye aggregation, high photoelectric conversion efficiency, and improving photon capture ability

Inactive Publication Date: 2018-11-16
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Especially since entering the 21st century, the demand for energy is increasing day by day. However, the two problems of energy shortage and environmental pollution have not been well resolved.

Method used

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  • D-A-pi-A three-dimensional phenothiazine dye sensitizer, preparation method and application thereof
  • D-A-pi-A three-dimensional phenothiazine dye sensitizer, preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] What this embodiment prepares is a kind of D-A-π-A stereoscopic phenothiazine dye sensitizer, and the synthetic route is as attached figure 1 Shown, the reaction steps are as follows:

[0037] (1) Synthesis of compound 1:

[0038] At room temperature, the phenothiazine (6.00g, 30.11mmol) in the above synthesis route was added to a three-necked flask, followed by N,N-dimethylformamide (70mL), and the temperature of the mixture was lowered to 0 with an ice bath. °C, sodium hydrogen (1.45 g, 60.22 mmol) was added in portions, and stirred at room temperature for 1 hour. Then slowly add n-bromooctane (8.72g, 45.16mmol) dropwise, react at room temperature for 6 hours, quench with ice water and extract with ethyl acetate (200mL), dry the organic phase with anhydrous sodium sulfate, filter and rotary evaporate under reduced pressure , the residue was purified by 200-300 mesh silica gel column chromatography (petroleum ether / ethyl acetate=100 / 1) to obtain 9.20 g of oily compou...

Embodiment 2

[0066] A D-A-π-A stereoscopic phenothiazine dye sensitizer prepared in Example 1 was assembled into a solar cell device. Printing of TiO on cleaned conductive substrates by screen printing 2 slurry, and then after drying, high temperature sintering and other procedures, TiO can be obtained 2 nanocrystalline film. A small hole with a diameter of about 0.8 mm is punched on the conductive glass substrate of the counter electrode to inject the electrolyte, and then the H 2 PtCl 6 (0.02M isopropanol solution) solution was spin-coated on a cleaned conductive glass substrate, and sintered at high temperature to obtain a Pt counter electrode. Sensitized TiO 2 The electrode and the Pt counter electrode are packaged with a heat-sealing film, and the electrolyte is injected by vacuum backfilling. The photoelectric conversion efficiency properties of the assembled battery devices were tested, and the test results are shown in Table 1.

[0067] Table 1 Photovoltaic performance parame...

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Abstract

Belonging to the technical field of solar cells, the invention specifically relates to a D-A-pi-A three-dimensional phenothiazine dye sensitizer, a preparation method and application thereof. The molecular structure of the dye sensitizer is shown as formula A. The dye sensitizer adopts cheap and easily available phenothiazine as the starting material, and is synthesized by substitution, bromination, suzuki coupling, boric acid esterification, Knoevenagel condensation and other simple reactions. The dye sensitizer adopt phenothiazine as the electron donor end, and uses spirobifluorene for three-dimensional modification, is conducive to inhibiting dye aggregation and reducing charge recombination, also introduces benzothiadiazole with electrical absorption as the charge trap, greatly improves the photon capture ability of dyes, shows good photoelectric conversion performance, and shows very good photoelectric performance in solar cells.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a D-A-π-A three-dimensional phenothiazine dye sensitizer and its preparation method and application. Background technique [0002] Energy is an important material basis for the survival of human society and the development of national economy. Especially since the beginning of the 21st century, the demand for energy is increasing day by day. However, the two problems of energy shortage and environmental pollution have not been well resolved. How to fully develop and utilize new energy to achieve green emission reduction has become one of the important issues that countries around the world urgently need to solve. Among renewable energy sources, solar energy, which is extremely rich in resources, has great potential for development, so the research and development of solar cells has always been widely concerned by scientists from all over the world. [0003] Dye-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D417/14C09B21/00H01G9/20
CPCC07D417/14C09B21/00H01G9/2059Y02E10/542
Inventor 贾海浪彭智杰林丽霞关明云
Owner JIANGSU UNIV OF TECH
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