Hybrid electrode, its preparation method and solar cell using the hybrid electrode

A hybrid and electrode technology, applied in the field of solar cells, can solve the problems of low energy conversion efficiency, low electron mobility, and large resistance of photovoltaic cells, and achieve the effects of improving photoelectric conversion efficiency, improving separation efficiency, and avoiding hole recombination.

Active Publication Date: 2015-10-28
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] TiO 2 There are many grain interfaces in the porous structure of the film, which leads to a large resistance of charge transmission between nanocrystalline particles and low electron mobility, which also leads to the phenomenon of recombination of electrons and holes in the electrolyte (dark current Phenomenon), making the energy conversion efficiency of photovoltaic cells low

Method used

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  • Hybrid electrode, its preparation method and solar cell using the hybrid electrode
  • Hybrid electrode, its preparation method and solar cell using the hybrid electrode
  • Hybrid electrode, its preparation method and solar cell using the hybrid electrode

Examples

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preparation example Construction

[0025] see figure 1 , the preparation method of the hybrid electrode of an embodiment, comprises the following steps:

[0026] Step S21, adding titanium dioxide nanocrystalline particles into a solvent to form a colloid with a mass concentration of titanium dioxide of 15% to 40%, then adding a surfactant and a chelating agent to the colloid, and stirring evenly to obtain a titanium dioxide colloid.

[0027] In this embodiment, the particle size of the titanium dioxide particles is 20 nm to 100 nm. The solvent is at least one selected from distilled water, ethanol, n-butanol or isopropanol.

[0028] In this embodiment, the surfactant is OP emulsifier or polyethylene glycol p-isooctyl phenyl ether (triton). The mass concentration of the surfactant in the titanium dioxide colloid is 1% to 5%.

[0029] In this embodiment, the chelating agent is acetylacetone. The mass concentration of the chelating agent in the titanium dioxide colloid is 1% to 10%.

[0030] In this embodimen...

Embodiment 1

[0048] Nano TiO 2 Added to distilled water, configured as TiO 2 The mass concentration is 25% TiO 2 For the colloid, add triton and acetylacetone in sequence so that the mass concentration of triton is 3%, and the mass concentration of acetylacetone is 6%, and grind for 30 minutes.

[0049] After the conductive substrate is cleaned and pretreated, the above-prepared colloid is scraped on the surface of the conductive film by scraping. After drying, the temperature is raised to 450°C at a rate of 20°C / min, and then This temperature was kept for 30 minutes, and then naturally cooled to 80°C.

[0050] Dissolve magnesium acetate in distilled water to make Mg 2+ The concentration is 0.05mol / L, and then the above prepared TiO 2 The porous film is immersed in 500ml of magnesium acetate solution, soaked for 3h, and then taken out and dried. Once again, the temperature was raised to 450°C at a rate of 20°C / min, and then kept at this temperature for 30 minutes, and then naturally c...

Embodiment 2

[0053] Nano TiO 2 Added to distilled water, configured as TiO 2 The mass concentration is 15% TiO 2 For the colloid, add triton and acetylacetone in turn, so that the mass concentration of triton is 1%, and the mass concentration of acetylacetone is 1%, and it is scraped by the method of Example 1, and calcined at high temperature.

[0054] Dissolve magnesium sulfate in distilled water to make Mg 2+ The concentration is 0.01mol / L, and then the above-prepared TiO 2 The porous film is immersed in 500ml of magnesium sulfate solution, soaked for 10h, then taken out, dried and calcined at high temperature to obtain MgO:TiO 2 The thickness of the porous semiconductor hybrid film is 12 μm.

[0055] Referring to Example 1, a dye-sensitized solar cell was assembled.

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Abstract

A hybridization electrode comprises a conductive substrate and a magnesium oxide: titanium dioxide porous semiconductor hybridization film which is coated on the conductive substrate. The magnesium oxide: titanium dioxide porous semiconductor hybridization film is formed by the hybridization electrode. Electrons which are performed optical excitation on the magnesium oxide is easy to inject into a titanium dioxide conductive band when the magnesium oxide is mixed into titanium dioxide nano particles due to the fact that the magnesium oxide is a wide bandgap semiconductor, simultaneously holes generated from the optical excitation process is transmitted to an electric pole or a fluid interface, so that the hybridization electrode has the advantages of improving the separation efficiency of the photon-generated carrier, effectively avoiding the hole composition between the electrons and electrolyte, being beneficial to photocurrent response of a cell and improving the photoelectric efficiency. The invention also provides a preparation method of the hybridization electrode and a solar cell using the hybridization electrode.

Description

【Technical field】 [0001] The invention relates to a hybrid electrode, its preparation method and a solar cell using the hybrid electrode. 【Background technique】 [0002] Photovoltaic cells are usually made of nanocrystalline TiO adsorbed with dyes 2 Photoanode (working electrode), containing I - / I 3 - The electrolyte and the counter electrode of the redox pair consist of three parts. The role of the counter electrode is to collect electrons from the external circuit of the battery and transfer them to the electrolyte quickly and with low consumption, while catalytically reducing the I in the electrolyte. 3 - . In addition, the counter electrode can also reflect the light not absorbed by the working electrode back to the working electrode for secondary absorption, thereby improving the absorption efficiency of sunlight. Therefore, as the counter electrode of DSSCs, it must have high catalytic activity, high carrier transport ability and good stability. [0003] The n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542Y02P70/521Y02P70/50
Inventor 周明杰王平冯小明梁禄生
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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