ZnO electrode material for hierarchical micro-acceptance structure of dye sensitization solar cell and electrode preparation method

A hierarchical micro-nano structure, solar cell technology, applied in photosensitive devices, electrolytic capacitors, circuits, etc., can solve the problems of restricting the photoelectric conversion efficiency of solar cells, reducing the amount of adsorbed dyes, etc., to increase photon scattering, improve photoelectric conversion efficiency, The effect of improving utilization

Inactive Publication Date: 2009-04-15
NANJING UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

For example, when large-sized particles replace a part of nanocrystalline particles, since the specific surface area of ​​large particles is much smaller than that of nanocrystalline particles, this will greatly reduce the amount of dye adsorbed, thereby affecting the number of electrons generated, and ultimately restricting the photoelectricity of solar cells. conversion efficiency

Method used

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  • ZnO electrode material for hierarchical micro-acceptance structure of dye sensitization solar cell and electrode preparation method
  • ZnO electrode material for hierarchical micro-acceptance structure of dye sensitization solar cell and electrode preparation method
  • ZnO electrode material for hierarchical micro-acceptance structure of dye sensitization solar cell and electrode preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put zinc acetate and diethylene glycol into the autoclave at a ratio of 0.3mol / L, the filling volume is 70%, heat up to 160°C at a speed of 5°C / min, and stir at a stirring speed of 200r / min for 8 Hours, after naturally cooling to room temperature, centrifuge, wash with ethanol three times, and dry at 60°C to obtain ZnO powder with hierarchical micro-nano structure. It is mainly composed of 25nm nanoparticles and small balls with a size of 2-3um.

[0026] Take 0.8g of the ZnO powder in 5ml of ethanol, ultrasonically disperse to prepare slurry, and then coat a layer of film on the conductive substrate (FTO) by coating method, after drying, put 0.5mmol / Soak in an ethanol solution of L N719 dye for 4 hours, take out and rinse the excess photosensitizer with ethanol to obtain a dye-sensitized solar cell working electrode.

[0027] The above-mentioned working electrode, platinum electrode, and electrolyte were assembled into a sandwich dye-sensitized solar cell, and its per...

Embodiment 2

[0030] Except that the post-treatment was carried out before soaking the dye (directly put into a horse boiling furnace and baked at 350° C. for 30 min), the rest of the preparation process was the same as in Example 1, and the performance parameter of the obtained dye-sensitized solar cell was J sc (Short-circuit current density) = 3.34mA / cm 2 , V oc (open circuit voltage) = 0.48V, FF (fill factor) = 69%, η (photoelectric conversion efficiency) = 1.08%.

Embodiment 3

[0032] Put zinc acetate and diethylene glycol into the autoclave at a ratio of 0.2mol / L, the filling volume is 70%, heat up to 180°C at a speed of 10°C / min, and stir at a stirring speed of 150r / min for 8 Hours, after naturally cooling to room temperature, centrifuge, wash with ethanol three times, and dry at 60°C to obtain ZnO powder with hierarchical micro-nano structure. It is mainly composed of 20nm nanoparticles and small balls with a size of 500 ~ 1um.

[0033] Take 0.8g of the ZnO powder in 5ml of ethanol, ultrasonically disperse to prepare a slurry, and then coat a thin film on the conductive substrate by coating method, after drying, put 0.3mmol / L N3 while hot at 80°C Soak in the ethanol solution of the dye for 4 hours, take out and rinse the excess photosensitizer with ethanol to obtain the working electrode of the dye-sensitized solar cell.

[0034] The above-mentioned working electrode, platinum electrode, and electrolyte were assembled into a sandwich dye-sensitiz...

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Abstract

The invention relates to a preparation method of a hierarchical micro-nano structure ZnO electrode material of a dye-sensitized solar cell; the ZnO electrode material with a hierarchical micro-nano structure is prepared by thermal reaction of a solvent. Zinc acetate and diols are poured into an autoclave according to the proportion of 0.01-1mol/L, the heating is carried out to 120-250 DEG C, the stirring reaction is carried out for 1-24 hours, and the centrifugal separation, the washing and the drying are carried out after the natural cooling to the room temperature, thereby obtaining hierarchical micro-nano structure ZnO powder. The obtained micro-nano structure ZnO electrode material is arranged in ethanol, slurry is prepared by ultrasonic dispersion, then a thin film with the thickness of 1-20um is coated on a conductive substrate by the coating method, the ZnO electrode material is arranged in 0.1-1mol/L photosensitizer solution at 80 DEG C for soaking for 0.5-8 hours after the drying, the ZnO electrode material is taken out, and the ethanol is used for completely removing the excess photosensitizer by washing, thereby obtaining a working electrode of the dye-sensitized solar cell.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, relates to a dye-sensitized solar cell graded micro-nano structure ZnO electrode material and a preparation method of the electrode, and also belongs to the technical field of new energy sources. Background technique [0002] As the focus of solving the energy crisis and environmental pollution, solar photovoltaic conversion has attracted more and more attention from governments in recent years. At present, silicon-based solar cells are mature and widely used in the market, but their production process is complex and the materials are expensive. Dye Sensitized Solar Cells (DSSC for short) has completely abandoned the traditional silicon solar cell process, and has found another way to become the new favorite of cheap solar cells. [0003] The heart of a DSSC cell is the semiconductor electrode. A good semiconductor electrode should meet the following four conditions: (a) it must hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042H01M14/00H01L31/0224
CPCY02E10/542Y02P70/50
Inventor 邹志刚王湘艳田汉民于涛张晓波元世魁田志鹏张继远薛国刚
Owner NANJING UNIV
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