Preparation method of quantum dot sensitized solar cell processed by full-water-solubility solvent

A water-soluble solvent, quantum dot sensitization technology, applied in the direction of photosensitive equipment, etc., can solve the problems of affecting the photoelectric conversion efficiency of the battery, volatile, unfavorable transmission, etc., to achieve the effect of improving the photoelectric conversion efficiency, easy regulation, and easy perfusion

Inactive Publication Date: 2014-10-29
YANGTZE UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The currently commonly used electrolyte is an inorganic semiconductor electrolyte material, which has the disadvantages of being volatile and highly toxic. Solid-state dye-sensitized solar cells using polymers as electrolytes can avoid some problems caused by the use of inorganic semiconductor electrolytes, and It has the advantages of simple preparation, low price, flexibility, and easy handling, and has always been a research hotspot
However, the solvents currently used are generally organic solvents, such as toluene, xylene, chlorobenzene, chloroform, tetrahydrofuran, etc. The use of these organic solvents will cause corresponding environmental pollution, thus violating the original idea of ​​developing solar cells as a "clean energy". original intention
[0005] Generally, conjugated polymers are hydrophobic materials, which are used as electrolytes for solid-state quantum dot-sensitized solar cells and infiltrated into hydrophilic quantum-dot-sensitized porous TiO 2 When the thin film is used, the interface with the thin film does not match, which is not conducive to the transmission of electrons, thus affecting the improvement of the photoelectric conversion efficiency of the battery

Method used

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  • Preparation method of quantum dot sensitized solar cell processed by full-water-solubility solvent

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1. With 30μl of Ti(OPr) 4 Disperse in 10ml of ethanol, prepare the precursor solution of titanium, and spin-coat on the surface of the conductive substrate FTO conductive glass 1 cleaned by ultrasonic, and then P25TiO 2 The powder was prepared into TiO with 100 μl of Triton X-100, 200 μl of acetylacetone, and 10 g of deionized water 2 Colloidal solution, after mixing uniformly by magnetic stirring and ultrasonic oscillation, the TiO 2 The colloidal solution is spin-coated on the surface of the conductive substrate FTO conductive glass 1, and then dried in an oven at 50°C; after drying, spin-coat TiO 2 Colloidal solution, prepared into oxide TiO after many repetitions 2 Porous membrane 2, and then put it into a muffle furnace to 450 ° C for 30 minutes to make oxide TiO 2 Porous membrane anode.

[0028] 2, the oxide TiO obtained through step 1 2 Porous membrane anode immersed in 0.1M CdSO 4 solution for 1 minute, take it out and rinse its surface with ethanol; then ...

Embodiment 2

[0034] 1. Mix the 350nm monodisperse polystyrene bead solution diluted to 0.1wt% with 0.003wt% surfactant Igepal CO-520 and ultrasonicate for 30 minutes, then place the conductive substrate FTO conductive glass cleaned by ultrasonic 1 Put the solution vertically, and then place it in a thermostat at 55°C until the solution evaporates completely. Add 0.12% (w / v) nitric acid to a 1.2% (w / v) ethanol solution of isopropyl titanate, put the conductive substrate FTO conductive glass 1 vertically into the solution and place it at room temperature for 5 minutes to grow on the surface A layer of titanium dioxide. Take out the FTO conductive glass 1 and dry it in air for 20 minutes. Mix 0.20mol / L ammonium hexafluorotitanate and 0.25mol / L boric acid aqueous solution at 51°C, adjust the pH to 2.9 with 1mol / L hydrochloric acid, immerse the FTO conductive glass 1 vertically in the solution for 30 minutes, then take it out and use deionized Wash with water, dry in the air at room temperatu...

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Abstract

The invention relates to a preparation method of a quantum dot sensitized solar cell processed by a full-water-solubility solvent. The method is characterized by including the following steps: 1.preparing a water-soluble oxide porous membrane (2) on a conductive substrate (1); 2.using an aqueous solution in situ deposition method to prepare a quantum dot sensitizer (3) on the oxide porous membrane (2); 3. preparing a hydrophilic conjugated polymer solid electrolyte (4) on the surface of the water-soluble oxide porous membrane (2) and then pouring the hydrophilic conjugated polymer solid electrolyte (4) into the oxide porous membrane (2); 4. preparing a metal cathode (5) on the surface of the solid electrolyte (4); 5. using a thermal packaging adhesive to bond an oxide anode and the metal cathode (5) so that a counter electrode is formed and connected through an external loop (6). The method uses the water-soluble conjugated polymer as the solid electrolyte and both of the oxide porous membrane and the nano-particle quantum dot sensitizer are hydrophilic so that negative effects brought by an organic solvent are prevented and the method has the characteristics of improving the photoelectric conversion efficiency of the solar cell and being environment friendly.

Description

Technical field: [0001] The invention relates to a preparation method of a quantum dot sensitized solar cell treated with a fully water-soluble solvent, and belongs to the technical field of solar cell structure design and application. Background technique: [0002] Quantum dot-sensitized solar cells (QDSSCs) have attracted close attention from the scientific community due to their low cost and facile fabrication process. The size effect of quantum dots allows people to adjust the spectral response range of solar cells by controlling their grain size. The impact ionization effect of quantum dots can make a high-energy photon excite two or more hot electrons, resulting in Higher than 100% quantum yield. [0003] Electrolyte is one of the important factors affecting the photoelectric conversion efficiency and stability of quantum dot-sensitized solar cells. The currently commonly used electrolyte is an inorganic semiconductor electrolyte material. Its disadvantage is that it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20
Inventor 熊艳邓飞
Owner YANGTZE UNIVERSITY
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