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Preparation method of dye-sensitized solar cell photoanode based on azo manganese complex modified TiO<2>

A technology of solar cells and complexes, applied in photosensitive devices, circuits, capacitors, etc., can solve the problems of improved photoelectric conversion efficiency, weak absorption intensity, and low conduction band efficiency

Inactive Publication Date: 2017-08-22
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention is to solve TiO 2 Based dye-sensitized solar cells have weak absorption in the visible region, TiO 2 There are a large number of defect states that cause serious interfacial photo-generated carrier recombination, and the photo-generated electrons caused by the wide band gap are injected into TiO by dyes. 2 The conduction band efficiency is low, which limits the improvement of battery photoelectric conversion efficiency, and provides a co-sensitization modification based on 4-[(8-hydroxy-5-quinoline)azo]-benzenesulfonic acid manganese complex and N719 TiO 2 Preparation method of dye-sensitized solar cell photoanode

Method used

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  • Preparation method of dye-sensitized solar cell photoanode based on azo manganese complex modified TiO&lt;2&gt;
  • Preparation method of dye-sensitized solar cell photoanode based on azo manganese complex modified TiO&lt;2&gt;
  • Preparation method of dye-sensitized solar cell photoanode based on azo manganese complex modified TiO&lt;2&gt;

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Embodiment approach 1

[0011] Embodiment 1: Assembly of co-sensitized solar cells: the blue light material [Mn(azobenzene-4,4'-dicarboxylic acid) 0.5 (H 2 O)] n The complex was dissolved in ethanol solvent to obtain 5 × 10 –4 mol / L complex solution. 0.25cm 2 TiO 2 The anode piece was immersed in the complex solution for 3 h and dried at room temperature; it was dissolved in N719 in a solution of acetonitrile and ethanol at a ratio of 1:1 to obtain a concentration of 5 × 10 –4 mol / L N719 solution. TiO soaked in step 1 2 The anode piece was then soaked in N719 solution for 20 hours, and dried at room temperature to obtain a co-sensitized anode film; the counter electrode was a platinum conductive glass prepared by pyrolysis: 5 mM H 2 PtCl 6 Mix it with dry isopropanol and heat it at 400 °C for 10 minutes; the composition of the electrolyte: 0.5 mol / L LiI as the solute, 0.05 mol / L I 2 and 0.1 mol / L tert-butylpyridine, the solvent is a mixed solution of propylene carbonate and anhydrous acet...

specific Embodiment approach 2

[0012] Specific embodiment two: on the basis of [Mn (azobenzene-4,4'-dicarboxylic acid) 0.5 (H 2 O)] n Co-sensitization of modified TiO by complexes and N719 2 Co-sensitized solar cells composed of photoanode and N719 modified TiO 2 The solar cell composed of photoanode is tested by linear sweep voltammetry for J-V test, and the test system consists of a simulated light source, a solar cell and an electrochemical workstation. The xenon light source is a simulated light source, and the incident light intensity is 100 mW / cm 2 . The AC impedance frequency range of the battery is 0.05 ~ 10 5 Hz, AC signal 10 mV, impedance data simulated by ZSimpWin. Based on [Mn(azobenzene-4,4'-dicarboxylic acid) 0.5 (H 2 O)] n Co-sensitization of modified TiO by complexes and N719 2 The photoanode will be N719 modified TiO 2 The photocurrent density of solar cells composed of photoanodes is from 8.09 mA / cm 2 Increased to 17.71 mA / cm 2 . The increase in photocurrent indicates that t...

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Abstract

The preparation of the dye-sensitized solar cell photoanode and the test of the photoelectric conversion efficiency of the co-sensitized solar cell assembled therefrom relate to the preparation method of azo organic luminescent material and N719 co-sensitized solar photoanode. The product of the present invention is based on the co-sensitization of TiO2 photoanode and platinum conductive glass based on blue-light material [Mn(azobenzene-4,4'-dicarboxylic acid) 0.5(H2O)]n complex and N719 co-sensitization modification Solar cells, compared with solar cells composed of N719-modified TiO2 photoanodes, based on [Mn(azobenzene-4,4'-dicarboxylic acid) 0.5(H2O)]n complexes and N719 co-sensitization modified The TiO2 photoanode increases the photocurrent density of the solar cell composed of N719-modified TiO2 photoanode from 8.09 mA / cm2 to 17.71 mA / cm2, and the photoelectric conversion efficiency of the battery increases from 4.0% to 7.1%, so the description is based on [Mn(azo Benzene-4,4'-dicarboxylic acid)0.5(H2O)]n complexes and N719 co-sensitize the modified TiO2 photoanode to enhance the absorption intensity of sensitized solar cells in the visible region.

Description

technical field [0001] The invention relates to a photoanode material for a dye-sensitized solar cell and a preparation method thereof, in particular to a co-sensitized modified TiO with azobenzene-4,4'-dicarboxylate manganese complex and N719 2 Fabrication method of dye-sensitized solar cell photoanode. Background technique [0002] Photosensitizer, as an important part of dye-sensitized solar cells (abbreviated as DSSC in English), plays a vital role in photoelectric conversion efficiency. So far, the photosensitizers mainly use vidapine compounds, but their absorption in the visible region is narrow, which limits the photon capture in the visible region, making the absorption spectrum of the cell not match the solar spectrum, and hindering the improvement of the photoelectric conversion efficiency of DSSC. . Therefore, it is very important to study full-spectrum sensitizers or co-sensitizers. Azo-type metal-organic coordination polymers mainly have strong absorption in...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542H01G9/2022H01G9/20
Inventor 罗亚楠姜慧莹刘芷晨于晓洋张俭
Owner JILIN INST OF CHEM TECH
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