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Zinc oxide/titanium dioxide hybrid electrode and preparation method thereof

A technology of titanium dioxide and zinc oxide, which is applied in the field of dye-sensitized nano-thin film solar cell hybrid electrodes and its preparation, can solve problems such as the gap in conversion efficiency, and achieve the effects of reducing transmission, reducing transmission resistance, and reducing internal resistance

Inactive Publication Date: 2010-05-05
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the photoelectric conversion efficiency of dye-sensitized solar cells can reach up to 12%, which is still far behind that of silicon-based solar cells.

Method used

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  • Zinc oxide/titanium dioxide hybrid electrode and preparation method thereof
  • Zinc oxide/titanium dioxide hybrid electrode and preparation method thereof
  • Zinc oxide/titanium dioxide hybrid electrode and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Preparation of ZnO seed crystal: Line-420 magnetron sputtering apparatus, pure zinc target above 99.99%, sputtering power is 270W, O 2 The flow rate is 10 sccm, the protective gas Ar flow rate is 30 sccm, the vacuum degree during sputtering is 2.0 Pa, and the sputtering time is 1.5 h. Anneal at 500°C for 30min in air. formed as figure 1 The ZnO seeded film shown;

[0025] (2) Growth of ZnO nanorod arrays: Use deionized water to prepare an aqueous solution of 0.02 mol / L zinc nitrate hexahydrate, 0.02 mol / L hexamethylenetetramine and 0.01 mol / L polyethyleneimine as nanorod hydrolysis precursors Solution, vertically immerse the ZnO nano-crystal seeds prepared in step 1) into the hydrolysis precursor solution, grow in a 90°C water bath for 1.5h, take out, rinse with deionized water and ethanol, and anneal at 400°C for 30min to form figure 2 Nanorod arrays shown;

[0026] (3) Composite TiO 2 Membrane: Stir tetrabutyl titanate and absolute ethanol evenly at a volume...

Embodiment 2

[0028] (1) Preparation of ZnO seed crystals: Dissolve zinc acetate dihydrate in ethylene glycol methyl ether, mix and stir for 30min to form ZnO 2+ Sol with a concentration of 0.8mol / L. The sol was spin-coated on the cleaned FTO glass substrate at 2500r / min and calcined in air at 400°C for 20min. To form Zn by dissolving zinc acetate in ethylene glycol methyl ether 2+ The colloid with a concentration of 0.8mol / L is a sol, which is spin-coated at 2500r / min and calcined in air at 400°C for 20min to form image 3 The ZnO seeded film shown;

[0029] (2) Growth of ZnO nanorod arrays: Use deionized water to configure an aqueous solution of 0.03 mol / L of zinc nitrate hexahydrate and 0.03 mol / L of hexamethylenetetramine as the nanorod hydrolysis precursor solution, and the ZnO prepared in step 1) The nanocrystal seeds were vertically immersed in the hydrolyzed precursor solution, grown in a 95°C water bath for 1h, taken out, rinsed with deionized water and ethanol, and annealed at ...

Embodiment 3

[0032]Adjust the concentration of zinc nitrate hexahydrate and hexamethylenetetramine in Step 2 of Example 2 to 0.025mol / L, add 0.005mol / L of surfactant polyethyleneimine, change the calcination temperature to 400°C, and other conditions and steps constant.

[0033] In order to test the application of the zinc oxide / titanium dioxide hybrid electrode of the present invention in dye-sensitized solar cells, the zinc oxide / titanium dioxide hybrid electrode prepared in Example 2 was used as a photoanode, and a dye-sensitized solar cell was assembled using a general sandwich structure And carried out the photoelectric performance test. Structure: conductive substrate / hybrid electrode-dye-electrolyte / Pt electrode / conductive substrate. Wherein the Pt electrode is a Pt black electrode prepared by pyrolysis of chloroplatinic acid, the dye is N719 of 0.4mmol / L, and the redox electrolyte ratio is: 0.05mol / L I 2 , 0.1mol / L LiI, 0.4mol / L TBP, 0.3mol / L DMP II, the conductive substrate is F...

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Abstract

The invention discloses a highly ordered zinc oxide nanometer rod electrode compound titanium dioxide electrode belonging to the technology of a dye-sensitized solar cell and a preparation method thereof. The method is as follows: depositing a layer of ZnO nano-crystal particles on a transparent electric conduction glass as a seed crystal surface, using a nonionic surface modifier and a zinc nitrate solution as a precursor, growing a ZnO nano rod array on the seed crystal surface and then calcining the ZnO nano rod array for a period of time in a certain temperature to prepare the highly ordered ZnO nano rod electrode, and finally forming a TiO2 membrane on the ZnO nano rod array electrode by a dip-coating method; the TiO2 membrane is sintered again to form the Zinc oxide / titanium dioxide hybrid electrode.

Description

Technical field: [0001] The invention belongs to the field of oxide semiconductor and solar cell production, and in particular relates to a dye-sensitized nano-film solar cell hybrid electrode and a preparation method thereof. Background technique: [0002] How to utilize solar energy resources that are clean, pollution-free, and less restricted by the geographical environment is a worldwide research hotspot in the field of energy and the environment. Among various new solar cells, dye-sensitized solar cells are characterized by their simple process and energy-consuming preparation process. It is considered to be one of the most powerful substitutes for silicon solar cells due to its many advantages such as low cost and low cost. At present, the photoelectric conversion efficiency of dye-sensitized solar cells can reach up to 12%, which is still far behind that of silicon-based solar cells. Nano-semiconductor electrodes are the core components of dye-sensitized solar cells,...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G9/20H01M14/00H01L51/44H01L51/48
CPCY02E10/542Y02E10/549
Inventor 李少彦
Owner IRICO
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