Iodine-doped titanium-based film material and preparation method thereof

A thin-film material, iodine-doped technology, applied in photosensitive devices, semiconductor/solid-state device manufacturing, electrolytic capacitors, etc., can solve the problem of not being reasonably and effectively introduced into visible light responsive thin films, and achieve high photoelectric absorption efficiency and controllable The effect of strong reproducibility and repeatability, strong adsorption capacity

Inactive Publication Date: 2010-02-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, currently for non-metal element doped TiO 2 Most of the research focuses on the field of photocatalysis; at the same time, by consulting relevant domestic and foreign journals and patent materials, it is found that the current method of applying non-metal element doping to prepare visible light-responsive TiO 2 Thin films, mostly concentrated in N, C doping, I doping TiO 2 Although the material has been proven to exhibit superior optical properties under both ultraviolet light and visible light, it has not been reasonably and effectively introduced into the field of preparation and application of visible light-responsive thin film materials. vacancy

Method used

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  • Iodine-doped titanium-based film material and preparation method thereof
  • Iodine-doped titanium-based film material and preparation method thereof
  • Iodine-doped titanium-based film material and preparation method thereof

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Embodiment 1

[0031] 1) Iodine doped TiO 2 Preparation of nanocrystals: at a stirring speed of 500 rev / min, drop 4ml of acetic acid into 20ml of tetraisopropoxytitanium, keep stirring for 20 minutes, then add 100ml of iodic acid in water, and in the resulting mixed solution, iodine and titanium The molar ratio is 0.1:1, heated to 80°C in a water bath, and after stirring for 30 minutes, adjust the pH value to 3, and then heat in an oil bath at 200°C for 12 hours to obtain iodine-doped TiO 2 Nanocrystalline milky liquid, in which TiO 2 The solid content is 20%, and a 200W ultrasonic titanium probe is used to ultrasonically disperse at a frequency of 15 times / second.

[0032] from figure 1 It can be seen that iodine doped TiO 2 The size of the nanocrystal is 10-20nm.

[0033] 2) Preparation of I-TNC film: add 0.005g polyethylene glycol 20000 (PEG20000) to 3ml iodine-doped TiO 2 In the milky liquid of nanocrystals, after fully grinding, add deionized water to adjust the concentration to ob...

Embodiment 2

[0035] 1) Iodine doped TiO 2 The preparation of nanocrystal: with embodiment 1 step 1);

[0036] 2) Sulfur-doped TiO 2 Preparation of large particles: At room temperature, the iodine element is ultrasonically dissolved in titanium tetraisopropoxide at a molar ratio of iodine to titanium of 0.1:1, stirred at a stirring rate of 500 rpm for 24 hours, and then placed in an oven at 100°C placed in the middle for 12 hours, and finally calcined at 500°C for 5 hours to obtain iodine-doped TiO 2 Large particles;

[0037] like figure 2 , it can be seen that the iodine-doped TiO prepared by this method 2 Large particles include irregular lumps and spheroids, and the diameter of spherical particles is 1-2 μm.

[0038] 3) Preparation of I-TBP film: 0.005g PEG20000 and 0.1g iodine doped TiO 2 Add 3ml iodine-doped TiO to large particles 2 After mixing and grinding in the milky liquid of nanocrystals and dispersing evenly, add deionized water to adjust the concentration to obtain TiO ...

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Abstract

The invention belongs to the technical field of preparing titanium dioxide film materials, in particular provides an iodine-doped titanium-based film comprising an iodine-doped TiO2 nanocrystalline film and an iodine-doped TiO2 nanocrystalline / bulky grain film, wherein the iodine-doped TiO2 nanocrystalline film is obtained by filming sizing agent which contains TiO2 nanocrystalline with grain diameter ranging from 5 to 35 nm and has the molar ratio of iodine to titanium ranging from 0.01 to 0.5:1, and the iodine-doped TiO2 nanocrystalline / bulky grain film is obtained by filming sizing agent which contains iodine-doped TiO2 nanocrystalline with grain diameter ranging from 5 to 35 nm and iodine-doped TiO2 bulky grain with grain diameter ranging from 400nm to 5 micrometers and has the weightratio of iodine-doped TiO2 bulky grain to iodine-doped TiO2 nanocrystalline ranging from 0.01 to 0.3:1 as well as the molar ratio of iodine to titanium ranging from 0.01 to 0.5 :1. The invention is easy to be implemented, and the obtained film has strong adsorption capacity, visible light response and high photoelectric absorption efficiency.

Description

technical field [0001] The invention belongs to the technical field of preparation of titanium dioxide thin film materials, and in particular relates to an iodine-doped titanium dioxide thin film used as a photoanode of a dye-sensitized solar cell and a preparation method thereof. Background technique [0002] With the rapid growth of human demand for energy, energy crisis and environmental pollution have become serious problems to be solved urgently. Compared with other energy sources, solar energy has the advantages of high efficiency, environmental protection, cheap and renewable. As an important way to develop and utilize solar energy, solar cells have attracted much attention. [0003] In recent years, the research on dye-sensitized solar cells (DSSCs) has made significant progress, and how to improve the photoelectric conversion efficiency of dye-sensitized solar cells is one of the focuses of current research. Dye-sensitized solar cells mainly realize photoelectric ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/20H01M14/00H01L51/44H01L51/46H01L51/48
CPCY02E10/50Y02E10/549
Inventor 陶霞侯茜郑言贞许辉陈建峰
Owner BEIJING UNIV OF CHEM TECH
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