Fluorescence resonance energy transfer photoanode and preparation method thereof

A fluorescence resonance energy, photoanode technology, applied in the field of photoanode, can solve the problems of complex reaction, difficult spacing control, limited FRET energy transfer efficiency, etc., to achieve the effect of wide spectral response range and high light absorption efficiency

Active Publication Date: 2018-11-09
中山市智玻新能源科技有限公司
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Problems solved by technology

in the prior art The main problems of this kind of battery are as follows: first, the absorption spectrum of squarylium dye is in the range of 600-700nm, and the effective utilization rate of sunlight energy is low; second, the recombination of excited electrons from the dye to the quantum dots weakens the FRET efficiency between the two. and battery efficiency; Kamat synthesized squarylium dyes with propylthiol bridges and connected them to quantum dots through four-step chemical reactions. Provide the spacing conditions required for FRET action, and the flexibility of the bridge chain and the curling phenomenon of molecular chains make it difficult to control the spacing
The above factors limit the FRET energy transfer efficiency between quantum dots and sensitizing dyes, resulting in low light absorption efficiency and low photoelectric efficiency of solar cells.

Method used

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  • Fluorescence resonance energy transfer photoanode and preparation method thereof
  • Fluorescence resonance energy transfer photoanode and preparation method thereof
  • Fluorescence resonance energy transfer photoanode and preparation method thereof

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preparation example Construction

[0031] A method for preparing a fluorescent resonance energy transfer photoanode, comprising sensitizing an n-type semiconductor film deposited on a conductive substrate in an alcohol solution of squarylium dye, and refluxing the halogenated film in a toluene solution of a halogenated thioacetate. After hydrolysis, a semiconductor photoanode connected with functional bridge chain molecules is obtained; the type I core-shell structure quantum dot containing ZnS shell is bonded with the semiconductor photoanode connected with functional bridge chain molecules.

[0032] The n-type semiconductor film is soaked in the alcohol solution of squarylium dye, the carboxyl group of the squarylium dye is bonded to the n-type semiconductor film, and the squarylium dye is adsorbed on the n-type semiconductor film to obtain the semiconductor photoanode sensitized by the squarylium dye.

[0033]The alcohol solution of the squaraine dye is an alcohol solution containing SQ1, SQ2, SQ3, SQ4 or SQ5...

Embodiment 1

[0052] a. Heat the porous n-type TiO2 film deposited on a transparent conductive substrate at 80°C for 2h, and place it in SQ1 with a concentration of 3×10 -4 mol / L ethanol solution for 12 hours. Take it out, rinse it with absolute ethanol, and dry it to get the SQ1-sensitized semiconductor photoanode.

[0053] b. Dissolving ethyl 2-iodothioacetate in toluene to prepare a toluene solution with a concentration of ethyl 2-iodothioacetate of 0.02 mol / L. Immerse the semiconductor photoanode sensitized by SQ1, under the protection of nitrogen, and react under constant temperature reflux at 20°C for 8h. Take it out, wash it with toluene, and dry it to get a precursor semiconductor photoanode connected with functional bridge chain molecules.

[0054] c. Immerse the precursor semiconductor photoanode connected with functional bridge chain molecules in ethanol, adjust the pH to 8 with KOH, and react at room temperature for 0.5 h. Take it out, rinse it with ethanol, and dry it to get...

Embodiment 2

[0058] a. Heat the porous n-type TiO2 film deposited on the transparent conductive substrate at 100°C for 0.5h, and place it in SQ1 with a concentration of 6×10 -4 mol / L ethanol solution for 24 hours. Take it out, rinse it with absolute ethanol, and dry it to get the SQ1-sensitized semiconductor photoanode.

[0059] b. Dissolving 3-iodopropyl thioacetate in toluene to prepare 3-iodopropyl thioacetate concentration in toluene solution of 0.02mol / L. Immerse the semiconductor photoanode sensitized by SQ1, under the protection of nitrogen, and react under constant temperature reflux at 20°C for 8h. Take it out, wash it with toluene, and blow it dry to obtain a semiconductor photoanode connected with a functional bridge chain molecular precursor.

[0060] c. Immerse the semiconductor photoanode connected with the functional bridge molecular precursor in ethanol, adjust the pH to 8 with NaOH, and react at room temperature for 0.5 h. Take it out, rinse it with ethanol, and dry it ...

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Abstract

The invention discloses a fluorescence resonance energy transfer photo anode and a preparation method therefor, and belongs to the technical field of the photo anode. The photo anode comprises a conductive substrate, an n type semiconductor film attached to the substrate and a photoelectric transmission layer attached to the semiconductor film; the photoelectric transmission layer comprises squaric acid dye connected to the semiconductor film, halogenated mercaptan connected to the squaric acid dye and I type core-shell structure quantum dots connected to the halogenated mercaptan; and the position of a shell layer conductive band of the quantum dots is higher than the LUMO energy level of the squaric acid dye. The fluorescence resonance energy transfer photo anode has the advantages of wide spectral response range, high light absorption efficiency, high fluorescence resonance energy transfer efficiency and high photoelectric conversion efficiency. The method comprises the steps of performing sensitization on the n type semiconductor film deposited in the conductive substrate in a squaric acid dye alcoholic solution, performing backflow halogenation and then hydrolysis in a methylbenzene solution of halogenated thioacetate to obtain a semiconductor photo anode connected with functional bridge chain molecules; and dispersing the I type core-shell structure quantum dots with a ZnS shell layer into methylbenzene to soak the semiconductor photo anode for 2-12h. Simple operation, high controllability and low cost are achieved.

Description

technical field [0001] The invention relates to the technical field of photoanodes, in particular to a fluorescence resonance energy transfer photoanode and a preparation method thereof. Background technique [0002] The energy crisis is becoming increasingly severe, and sensitized solar cells have become a research hotspot in the field of new energy due to their advantages such as simple process and low cost. However, the limited spectral response range of photosensitizers in sensitized solar cells restricts the light absorption efficiency of the cells, which greatly affects the photoelectric efficiency of the cells. Therefore, it is of great significance to effectively expand the spectral response range of solar cells and build a wide-spectrum responsive cell with stronger light absorption efficiency for improving the photoelectric conversion efficiency of the cell and promoting its practical application. [0003] At present, the research on the bonding system of quantum ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20
CPCH01G9/2059Y02E10/542
Inventor 梁桂杰李望南陈美华汪竞阳钟志成程晓红王松
Owner 中山市智玻新能源科技有限公司
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