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NaYF4:Ln<3+>/C/TiO2 composite photoanode and preparation method thereof

A composite light and anode technology, applied in photosensitive equipment, photovoltaic power generation, final product manufacturing, etc., can solve the problem of low photoelectric conversion efficiency of sensitized solar cells, achieve the effect of improving electron transmission capacity and improving conductivity

Inactive Publication Date: 2013-10-02
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low photoelectric conversion efficiency of dye-sensitized solar cells assembled into existing composite photoanodes, and to provide NaYF 4 :Ln 3+ / C / TiO 2 Composite photoanode and preparation method thereof

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  • NaYF4:Ln&lt;3+&gt;/C/TiO2 composite photoanode and preparation method thereof

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specific Embodiment approach 1

[0020] Specific implementation mode 1: this implementation mode NaYF 4 :Ln 3+ / C / TiO 2 Composite photoanode made of rare earth NaYF 4 :Ln 3+ Nanocrystalline, C quantum dots, TiO 2 and FTO conductive glass; the rare earth NaYF 4 :Ln 3+ Nanocrystalline, C and TiO 2 The mass ratio is 1:1:(10-1000); the FTO conductive glass is F-doped conductive glass, and the rare earth NaYF 4 :Ln 3+ The nano crystal is prepared from a rare earth nitrate solution, a surfactant and a fluorine source solution, wherein the solute in the rare earth nitrate solution is a mixture of yttrium nitrate, erbium nitrate and ytterbium nitrate.

[0021] The rare earth NaYF described in this embodiment 4 :Ln 3+ Nanocrystals are in the cubic crystal phase.

specific Embodiment approach 2

[0022] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the surface load of the FTO conductive glass is 0.5-3.0 mg / cm 2 , The thickness of the load layer is 1-5mm.

specific Embodiment approach 3

[0023] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that TiO 2 For commercial P25 type TiO 2 . Other ingredients are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses an NaYF4:Ln<3+> / C / TiO2 composite photoanode and a preparation method thereof, and relates to a composite photoanode and a preparation method thereof. The photoanode and the method aim at solving the problem that a dye-sensitized solar cell assembled by the existing composite photoanode is low in photoelectric conversion efficiency. The composite photoanode is prepared by rare earth nanocrystallines, C quantum dots, TiO2 and FTO (Fluorine doped Tin Oxide) conductive glass. The preparation method comprises the steps that 1, a rare earth nitrate solution, a surfactant and a fluorine source solution are mixed and subjected to solvent heat treatment; 2, NaYF4:Ln<3+> nanocrystallines are obtained after washing and drying; 3, the nanocrystallines, the C quantum dots and PVP (Poly Vinyl Pyrrolidone) are mixed; 4, a mixed material is mixed with tetrabutyl titanate, and subjected to electrostatic spinning; 5, a composite micro fiber is prepared by roasting; 6, mixed sol is prepared; and 7, the surface of the FTO glass is coated with the mixed sol by a knife coating method, and the composite photoanode is prepared. The composite photoanodes are assembled to form the dye-sensitized solar cell, and the photoelectric conversion efficiency of the cell reaches 7%.

Description

technical field [0001] The invention relates to a composite photoanode and a preparation method thereof. Background technique [0002] Dye-sensitized Solar Cells (DSSCs for short) have attracted widespread attention at home and abroad due to their low cost, simple process and easy repeatability. The dye-sensitized semiconductor photoanode is a key part of DSSCs, which largely determines the photoelectric conversion efficiency of DSSCs. At present, the commonly used dyes are bipyridyl ruthenium series compounds, and their absorption range is mainly between 400-600nm. The absorption of long-wave visible light and infrared light, which accounts for 43% of the total energy of sunlight, is weak, which limits DSSCs to a certain extent. Further improvement of photoelectric conversion efficiency. By broadening the spectral response range of the dye, optimizing the semiconductor surface structure and composition, and strengthening the combination between the dye and the semiconduct...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G9/20H01M14/00
CPCY02E10/542Y02P70/50
Inventor 王国凤李莹潘凯潘清江付宏刚
Owner HEILONGJIANG UNIV
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