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Preparing method of non-metal doped dye sensitization TiO2 nano-crystal thin film photoelectrode

A technology of dye sensitization and thin film electrodes, which is applied in the field of preparation of TiO2 nanocrystalline thin film photoelectrodes to achieve the effects of easy operation, increased photovoltage and improved light absorption efficiency

Inactive Publication Date: 2009-11-25
BEIJING UNIV OF CHEM TECH +1
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Problems solved by technology

The non-metallic doping reported in the current literature is widely used in the field of photocatalysis, but no one has applied it to the field of solar cells

Method used

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  • Preparing method of non-metal doped dye sensitization TiO2 nano-crystal thin film photoelectrode

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preparation example Construction

[0020] The preparation method of titanium dioxide powder:

[0021] Method 1: Dissolve 20ml of 4M titanium tetrachloride hydrochloric acid solution in 200ml of water, add 20 drops of polyoxyethylene lauryl ether (3), stir for 10 minutes, and then titrate with 3M ammonia water at a rate of 1 drop per 3 seconds. The end point of the titration was pH=9, and then aged for 20 hours. Wash with water 5 times in a centrifuge bucket, then exchange alcohol twice, and dry in an oven at 50°C to obtain a powder;

[0022] Method 2: Take 20ml of 4M nitric acid solution of tetrabutyl titanate and dissolve it in 200ml of water, add 18 drops of polyoxyethylene lauryl alcohol (3) ether, stir for 10 minutes, and then use 0.6M sodium carbonate solution for 2 seconds 1 The titration was carried out at the speed of the drop, and the end point of the titration was pH=5-6, and then aged for 24 hours. Wash with water 8 times in a centrifuge bucket, then exchange alcohol twice, and dry in an oven at 40...

Embodiment 1

[0027] (1) Weigh 0.7612g of thiourea and add it to a 50ml beaker, dissolve it in 10ml of ethanol aqueous solution with a volume ratio of 1:1, add 5ml of 4M titanium tetrachloride hydrochloric acid solution dropwise into the thiourea solution, and stir for 1 hour , aged for 24 hours, obtained TiO doped with S and N elements 2 Sol;

[0028] (2) Weigh 1.0299 g of the titanium dioxide powder obtained in Method 1 of preparation of titanium dioxide powder, mix it with 6.4 ml of 1M thiourea solution, dry it at 50° C. and then heat-treat it at 500° C. for 1 hour. Obtain TiO doped with S and N elements 2 Powder;

[0029] (3) Weigh 0.5 g of the non-metal doped powder prepared in step (2), and add 5 ml of the non-metal doped sol prepared in step (1). Non-metal doped TiO obtained after full grinding 2 Milky white slurry;

[0030] (4) Utilize the non-metallic doped sol obtained in step (1) to throw off the film 4 times on the conductive substrate cleaned up by a homogenizer, and then ...

Embodiment 2

[0033] (1) Weigh 0.8g of urea into a 50ml beaker, dissolve it in 10ml of ethanol aqueous solution with a volume ratio of 1:1, add 5ml of 4M tetrabutyl titanate isopropanol solution dropwise into the urea solution, and stir 1 hour, aging for 20 hours to obtain N-doped TiO 2 Sol;

[0034] (2) Weigh 1.0199 g of the titanium dioxide powder obtained in the second preparation method, mix it with 4.25 ml of 1M urea solution, dry it at 60° C. and then heat-treat it at 450° C. for 1 hour. Obtain N-doped TiO 2 Powder;

[0035] (3) Weigh 0.5 g of the non-metal doped powder prepared in step (2), and add 5 ml of the non-metal doped sol prepared in step (1). Non-metal doped TiO obtained after full grinding 2 Milky white slurry;

[0036] (4) Utilize the non-metallic doped sol obtained in step (1) to throw off the film 3 times on the conductive substrate cleaned up by a homogenizer, and then use the TiO obtained in step (3) 2 The slurry was casted 5 times on the conductive substrate coa...

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Abstract

The invention belongs to the preparing field of TiO2 nano-crystal thin film photoelectrode of dye sensitization solar cell, especially relates to a preparing method of non-metal doped dye sensitization TiO2 nano-crystal thin film photoelectrode which is prepared by colloids containing non-metal doped large granule TiO2 nano-crystal and non-metal doped TiO2 nano-crystal granule. The photoelectrode prepared by the invention is prepared by rotary coating the non-metal doped TiO2 colloidal sols and non-metal doped TiO2 power body slurry in order on a conductive substrate; after naturally drying, performing heat-treatment to obtain a nano-crystal thin film photoelectrode with porous structure. On one hand, the non-metal doped TiO2 nano-crystal granule changes the performance of the semiconductor, and is used as almsgiver to provide more carriers to improve the electric conductivity; on the other hand, the non-metal doped TiO2 nano-crystal granule changes the position of TiO2 energy band to improve the photovoltage and the photo absorption efficiencies. The preparing method of the invention is simple and is easy to operate, is suitable for the industrial production preparation of the dye sensitization TiO2 nano-crystal thin film photoelectrode, and also is suitable for the fields of photochemical catalysis electrode and self-cleaning glass and so on.

Description

technical field [0001] The invention belongs to TiO of dye-sensitized solar cells 2 The technical field of preparation of nanocrystalline thin film photoelectrode, especially related to the large particle TiO containing doped non-metal 2 Nanocrystalline and nonmetal-doped TiO 2 Colloidal Preparation of Metalloid-doped Dye-Sensitized TiO by Nanocrystalline Particles 2 Nanocrystalline Thin Film Photoelectrodes. Background technique [0002] The utilization technology of solar cells as the most ideal energy source has been valued and utilized by more and more countries in recent years. However, they have not been widely used. Comparable; silicon solar cell manufacturing itself is a huge energy-consuming industry. In recent years, a dye-sensitized solar cell has attracted the attention of researchers due to its simple manufacturing process, extremely low cost control, and many advantages such as conversion efficiency not limited by theory. In 1991, Graetzel (Switzerland) an...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01M14/00H01L51/48
CPCY02E10/50Y02E10/549Y02P70/50
Inventor 张敬畅李启云杨秀英曹维良李海平
Owner BEIJING UNIV OF CHEM TECH
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