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Titanium/strontium covered nanocrystalline titanium dioxide film for dye-sensitized solar cell and preparation method thereof

A titanium dioxide and nanocrystalline technology, which is applied in the field of preparation of titanium/strontium-coated nanocrystalline titanium dioxide film, can solve the problems of reducing the photoelectric conversion efficiency of solar cells and increasing the charge recombination on the electrode surface, so as to improve the energy conversion efficiency and improve the energy conversion Efficiency, open-circuit photovoltage improvement effect

Inactive Publication Date: 2012-12-19
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

[0003] Nanostructured semiconductors in solar cells absorb a large number of monolayer dye molecules through their huge surface area, which improves the collection efficiency of sunlight; at the same time, nanosemiconductors transport electrons injected from dye molecules to the collecting electrodes, but the huge size of semiconductor electrodes The surface area also increases the charge recombination on the electrode surface, thereby reducing the photoelectric conversion efficiency of the solar cell. In order to improve the photovoltaic performance of the cell, a variety of physical and chemical modification techniques have been developed to improve the nano-TiO 2 electrode characteristics, these technologies include TiCl 4 Surface treatment, surface coating, doping, etc., among which surface coating is a promising method, and surface coating relies on a semiconductor or insulating layer with a higher conduction band position to form a so-called core-shell structure barrier layer to reduce Combination can significantly improve the implantation, transfer efficiency and transport performance of nanocrystalline titanium dioxide films. At present, there is no report on the application of titanium / strontium double-layer coated nanocrystalline titanium dioxide films in dye-sensitized solar cells.

Method used

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  • Titanium/strontium covered nanocrystalline titanium dioxide film for dye-sensitized solar cell and preparation method thereof
  • Titanium/strontium covered nanocrystalline titanium dioxide film for dye-sensitized solar cell and preparation method thereof
  • Titanium/strontium covered nanocrystalline titanium dioxide film for dye-sensitized solar cell and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] Example 1: Preparation of nanocrystalline titanium dioxide film (Ti) without any treatment

[0022] Under vigorous stirring, 14 g of tetraisopropyl titanate was slowly added dropwise to 50 mL of deionized water, and the stirring was continued for 2 h, and a white precipitate was formed. The resulting white precipitate was filtered and washed to obtain 24 g of titanium dioxide wet precipitate, which was transferred to a three-necked flask, and 3.65 g of tetramethylammonium hydroxide aqueous solution was slowly added dropwise, and deionized water was added to adjust the total mass to 40 g. g. The reaction was vigorously stirred in an oil bath at 120 °C for 3 h, cooled naturally to room temperature, and the reaction was completed

[0023] The resulting white colloid was adjusted to 50 mL and transferred to a 100 mL autoclave for hydrothermal treatment at 220 °C for 8 h. After natural cooling, it was taken out and subjected to ultrasonic treatment for 20 min to obtain a m...

Embodiment 2

[0024] Embodiment 2: the preparation of the titanium tetrachloride solution of 2 mol / L

[0025] Weigh 38 g of titanium tetrachloride and add it to the dropping funnel, connect the nitrogen with a glass dropper, insert the top of the dropping funnel, blow with nitrogen for 5 min, and dissolve titanium tetrachloride drop by drop in a container filled with 50 mL of deionized water. In a beaker (in an ice bath), stir vigorously on a magnetic stirrer for 30 min, the mixed solution becomes a colorless transparent solution, then gradually transfer the solution to a volumetric flask, add deionized water to make the total volume reach 100 mL, and obtain Titanium tetrachloride solution with a concentration of 2 mol / L.

Embodiment 3

[0026] Embodiment 3: the preparation of the strontium acetate solution of 1 mol / L

[0027] Weigh 21.47 g of strontium acetate, add 70 mL of water, stir at room temperature for 30 min, then transfer to a 100 mL volumetric flask, and dilute to 100 mL with deionized water to obtain a strontium acetate solution with a concentration of 1 mol / L .

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Abstract

The invention relates to a titanium / strontium covered nanocrystalline titanium dioxide film for a dye-sensitized solar cell and a preparation method thereof. The titanium / strontium dual-layer covered nanocrystalline titanium dioxide film is prepared by adding strontium acetate and titanium tetrachloride solution to untreated nanocrystalline titanium dioxide film by way of impregnating. The titanium dioxide film and the preparation method have the following beneficial effects: the semiconductor film effectively prolongs the lives of charges and reduces the probability of charge recombination so that the interfacial charge transfer efficiency is improved; the film is adopted to package the dye-sensitized solar cell and test the performances of the dye-sensitized solar cell; the short-circuit photocurrent, open-circuit photovoltage and energy conversion efficiency of the cell are substantially improved; and the preparation method has obvious advantages compared with the conventional TiCl4 treatment methods.

Description

technical field [0001] The invention belongs to the field of inorganic photoelectric materials, and in particular relates to a preparation method of a titanium / strontium-coated nanocrystalline titanium dioxide thin film used for a dye-sensitized solar cell. Background technique [0002] Since Professor Grate1 introduced the concept of nanoporosity into dye-sensitized wide bandgap TiO in 1991 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, DSSC cells have won due to their potential low cost, relatively simple manufacturing process and technology, and relatively stable performance. received widespread attention from the people. This battery is achieved by adsorption of polypyridine complex dyes to nanoporous TiO with the aid of Ru(II) 2 On the surface of the thin film semiconductor electrode, the spectral response of the semiconductor can be broadened to the visible...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/20H01M14/00H01L51/44H01L51/48
CPCY02E10/542Y02E10/50Y02E10/549
Inventor 王忠胜王书涛周刚吴静林玉往刘国心
Owner 江苏有则创投集团有限公司