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A kind of tio2 slurry for preparing large-area dye-sensitized solar cells by screen printing process and its preparation method

A solar cell and screen printing technology, applied in the field of dye-sensitized solar cells, can solve problems such as cracking and peeling, and achieve the effects of improving photoelectric transmission efficiency, increasing light capturing ability, and improving transmission performance.

Active Publication Date: 2015-11-04
KUSN INNOVATION INST OF NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to overcome existing TiO 2 The slurry is prone to cracking and peeling when the large-area dye-sensitized solar cell is prepared by the screen printing process, and a TiO2 specially used for the preparation of the large-area dye-sensitized solar cell by the screen printing process is provided. 2 Slurry and its preparation method

Method used

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  • A kind of tio2 slurry for preparing large-area dye-sensitized solar cells by screen printing process and its preparation method
  • A kind of tio2 slurry for preparing large-area dye-sensitized solar cells by screen printing process and its preparation method
  • A kind of tio2 slurry for preparing large-area dye-sensitized solar cells by screen printing process and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of TiO with a particle size of 20nm 2 :

[0031] (1) Weigh 29g of titanium tetraisopropoxide, 6g of glacial acetic acid, add glacial acetic acid dropwise in titanium tetraisopropoxide, stir for 10 ～ After 15 minutes, add the solution dropwise to 143g of deionized water within 3-5 minutes to produce a white flocculent precipitate, and stir vigorously for 1 hour;

[0032] Add 2.6ml of concentrated nitric acid (commercially available 65wt%, 1.4g / ml) dropwise to the above-mentioned flocculent solution, and preheat the solution: within 40min from room temperature to 80°C, and keep it warm for 50min to obtain a transparent Light blue colloidal solution, cooled to room temperature;

[0033] Dilute the above colloidal solution to 185mL with deionized water, pour it into a 250ml autoclave, and react under high pressure at 240°C for 12h;

[0034] After the reaction, add 1.2ml of concentrated nitric acid dropwise to the reaction solution, ultrasonically disperse, ce...

Embodiment 2

[0041] Preparation of TiO with a particle size of 20nm 2 :

[0042] (1) Weigh 36.6g of titanium tetraisopropoxide, 7.7g of glacial acetic acid, add glacial acetic acid dropwise in titanium tetraisopropoxide, stir for 10 ～ After 15 minutes, add the solution dropwise to 181g of deionized water within 3-5 minutes to produce a white flocculent precipitate, and stir vigorously for 1 hour;

[0043]Add 3.5ml of concentrated nitric acid (commercially available 65wt%, 1.4g / ml) dropwise to the above-mentioned flocculent solution, and preheat the solution: within 45min from room temperature to 80°C, and keep it warm for 50min to obtain a transparent Light blue colloidal solution, cooled to room temperature;

[0044] Dilute the above colloidal solution to 239mL with deionized water, pour it into a 300ml autoclave, and react under high pressure at 230°C for 12h;

[0045] After the reaction, add 1.52ml of concentrated nitric acid dropwise to the reaction solution, ultrasonically disperse...

Embodiment 3

[0052] Preparation of TiO with a particle size of 20nm 2 :

[0053] (1) Weigh 50g of titanium tetraisopropoxide, 10.24g of glacial acetic acid, add glacial acetic acid dropwise in titanium tetraisopropoxide, stir for 10 ～ After 15 minutes, add the solution dropwise to 247.4g of deionized water within 3-5 minutes to produce a white flocculent precipitate, and stir vigorously for 1 hour;

[0054] Add 4.75ml of concentrated nitric acid (commercially available 65wt%, 1.4g / ml) dropwise to the above-mentioned flocculent solution, and preheat the solution: within 50min from room temperature to 80°C, and keep it warm for 50min to obtain a transparent Light blue colloidal solution, cooled to room temperature;

[0055] Dilute the above colloidal solution to 320mL with deionized water, pour it into a 500ml autoclave, and react under high pressure at 240°C for 12h;

[0056] After the reaction, add 1.2ml of nitric acid dropwise to the reaction solution, ultrasonically disperse, centrifu...

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Abstract

The invention discloses TiO2 slurry used in large-area dye-sensitized solar cell preparation by a screen printing technology. The TiO2 slurry comprises TiO2, terpilenol, ethyl cellulose, a leveling agent and ethanol. The mass ratio of the TiO2, the terpilenol, the ethyl cellulose and the leveling agent is 0.5-3: 3-13: 0.3-2:0.1-3; the particle size of the TiO2 is 10-30 nm, wherein if counted by number, the TiO2 with a particle size equal to or more than 10 nm and less than 20 nm accounts for 10% to 25%, the TiO2 with a particle size of 20 nm accounts for 60% to 75%, and the TiO2 with a particle size more than 20 nm and equal to or less than 30 nm accounts for 10% to 20%; the viscosity of the slurry is 2.1*10<5> to 2.5*10<5> mPa.s. The slurry can be printed repeatedly and no cracks are generated; high-temperature sintering enables the slurry to exhibit excellent inter-particle bonding performance and not easy to exfoliate; and therefore, the provided TiO2 slurry and a method for preparing the TiO2 slurry are suitable for large-area dye-sensitized solar cell preparation by using the screen printing technology and have industrial mass production prospects.

Description

technical field [0001] The invention belongs to the field of dye-sensitized solar cells, in particular to a TiO used in the preparation of large-area dye-sensitized solar cells by a screen printing process 2 Slurry and method for its preparation. Background technique [0002] Dye-sensitized nano-TiO 2 Solar cells have gradually become a hot spot in solar cell research. The photoanode of the cell is an important part of the dye-sensitized solar cell. Nano-TiO in the photoanode 2 It plays a vital role in improving the photoelectric performance and conversion efficiency of the battery. After years of research by relevant research groups, it has been found that the pure anatase structure TiO of about 20nm 2 It can effectively improve the photoelectric performance and conversion efficiency of the battery. The screen printing process is a commonly used process for preparing large-area and large-scale dye-sensitized solar cells. [0003] CN102231304A discloses a nano-TiO 2 The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/20
CPCY02E10/542Y02P70/521Y02P70/50
Inventor 文贵华顾军邹志刚
Owner KUSN INNOVATION INST OF NANJING UNIV
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