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Nano-titanium dioxide composite film material embedded with gold nanoparticles and preparation method thereof

A nano-titanium dioxide, gold nanoparticle technology, applied in the direction of photosensitive equipment, final product manufacturing, sustainable manufacturing/processing, etc., to achieve the effect of enhancing dye absorption, strong application prospects, and compensating for low photovoltage

Inactive Publication Date: 2015-12-02
江苏有则创投集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The nanocrystalline titanium dioxide composite structure inlaid with gold nanoparticles can modulate the conduction band energy level and shift it negatively. It can effectively suppress the charge return and increase the light absorption efficiency of the dye by using the surface plasmon effect, thereby realizing the photoelectric conversion of the battery. A substantial increase in efficiency, which has not yet been reported in related studies

Method used

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  • Nano-titanium dioxide composite film material embedded with gold nanoparticles and preparation method thereof
  • Nano-titanium dioxide composite film material embedded with gold nanoparticles and preparation method thereof
  • Nano-titanium dioxide composite film material embedded with gold nanoparticles and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: Preparation of gold nanoparticle colloid

[0021] Add 50mL of acetone to 8.4g of 4-chloromethylstyrene and 14.9g of triphenylphosphine, stir at 45°C for about 50h under nitrogen protection, filter and wash with acetone, and dry under vacuum for 12h to obtain white solid Quaternary phosphonium salt ionic liquid monomer, and then dissolve the ionic liquid monomer together with 1g ethylene glycol dimethacrylate and 0.002g azobisisobutyronitrile in 100mL methanol, stir at 70°C for 48h, and then use acetone Precipitate, then wash and filter with tetrahydrofuran and deionized water respectively, and dry under vacuum for 12 hours to obtain a cross-linked polymer stabilizer (abbreviated as CLP). Finally, sodium borohydride is quickly added CLP is stirred in the deionized aqueous solution (the concentration of chloroauric acid is 1mM) that is mixed by mass ratio 1:1~1:50 until the solution color changes from orange to brownish red, and the average particle size is ...

Embodiment 2

[0022] Embodiment 2: the preparation of nanocrystalline titanium dioxide colloid

[0023] Add 14g of titanium isopropoxide dropwise to 50mL of deionized water, stir the reaction for 2 hours at room temperature to fully form a white precipitate, filter the formed white precipitate and transfer it to a round bottom reaction bottle, and slowly add an equivalent amount of tetramethyl Aqueous ammonium hydroxide solution was stirred vigorously in an oil bath at 120°C for 3 hours. After cooling down to room temperature naturally, the white colloid obtained from the reaction was transferred to an autoclave and the volume was set at 100 mL. Hydrothermal treatment was carried out at 220°C for 10 hours and cooled naturally. , taken out and subjected to ultrasonic treatment for 20 minutes to obtain milky white nano-titanium dioxide sol. Titanium dioxide nanoparticles prepared under these conditions are in the anatase crystal form ( figure 1 Shown in curve 2), the particle size is about 2...

Embodiment 3

[0024] Example 3: Preparation of nano-TiO thin film and performance characterization of dye-sensitized solar cell

[0025] Using the nano-titanium dioxide sol prepared in Example 2, a sol film is formed on the cleaned conductive glass by spin coating or screen printing, and the dried film is placed in a muffle furnace, and the temperature is slowly raised to 480°C and kept warm 2h, after natural cooling, the nano-titanium dioxide film can be obtained.

[0026] According to the conventional battery assembly method, the nano-titanium dioxide film was used as a photoanode to assemble DSSCs, and the battery area was 0.25 cm 2 , the current density-voltage (J-V) curve of the dye-sensitized solar cell was measured under AM1.5 simulated sunlight ( image 3 As shown in curve 1), the open circuit photovoltage is 766mV, and the short circuit photocurrent is 9.66mA / cm 2 , the fill factor is 0.744, and the energy conversion efficiency is 5.5%.

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Abstract

The invention discloses a nanometer titanium dioxide composite thin film material with gold nano particles inlaid and a preparation method thereof. Firstly, gold nano particle colloid is compounded with a cross-linked polymer serving as a stabilizer and then the gold nano particle colloid is inlaid on surfaces of titanium dioxide nano particles through chemical bonding and sintering effect so that a gold / titanium dioxide composite structure material is formed. Inlaying of the nano particles is capable of regulating conduction band positions of titanium dioxide so that the regulation conduction band positions of the titanium dioxide are shifted in a negative mode, back-passing of separated electric charges can be effectively restricted and dye absorption can be enhanced through plasma effect of the gold nano particles. The titanium dioxide composite thin film with the gold nano particles inlaid serves as a photo-anode to manufacture a dye-sensitized solar cell, photovoltage of an open circuit reaches up to 865 mV and energy exchange efficiency reaches up to 10.1%. The nanometer titanium dioxide composite thin film material with the gold nano particles inlaid is simple in process and beneficial for preparing the efficient ultra thin dye-sensitized solar cell.

Description

technical field [0001] The invention belongs to the field of inorganic photoelectric materials, in particular to a nano-titanium dioxide composite thin film material embedded with gold nanoparticles for dye-sensitized solar cells and a preparation method thereof. Background technique [0002] since 1991 The professor introduced the concept of nanoporosity into dye-sensitized wide bandgap TiO 2 In semiconductor research, since the dye-sensitized solar cell (Dye-Sensitized Solar Cell, DSSC) with an energy conversion efficiency of 7.1% was obtained, the DSSC cell has won people with its potential low cost, relatively simple manufacturing process and technology, and stable performance. widespread attention. [0003] After 20 years of unremitting efforts, at present, although the highest efficiency of DSSCs has reached 12.3%, it is still far below the theoretical maximum efficiency of DSSCs of 30%. As an important part of the battery, the preferred semiconductor material for ...

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 王忠胜李燕王鸿冯全友靳君付世创吴伟忠常清
Owner 江苏有则创投集团有限公司