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Patterned composite film preparation method for reinforcing photo-absorption of titanium dioxide film

A composite film and patterning technology, applied in photovoltaic power generation, final product manufacturing, sustainable manufacturing/processing, etc., to achieve the effect of complete pattern, expanded light absorption wavelength range, and high selectivity

Inactive Publication Date: 2011-06-22
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been many studies on p-Cu x S / n-TiO 2 Composite thin films have been reported, but about Cu x S-modified Cu with patterned microstructure x S / TiO 2 The preparation of nanocomposite films, the patent for improving the solar light absorption efficiency of the film has not been reported so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) TiO 2 Preparation of the film: First, immerse the glass substrate in anhydrous methanol solution of 5mM 3-aminopropyltriethoxysilane (APTS), assemble at room temperature for 3h, take it out, wash it with anhydrous methanol and secondary water successively, and blow it with nitrogen. dry; then take 0.06g Ti(SO 4 ) 2 , 0.058g H 2 o 2 and water to form a precursor solution, and adjust the pH value to about 1.6; then place the glass substrate with APTS on the surface in the precursor solution, and deposit at 80°C for 20min.

[0021] 2)-CH 3 / -NH 2 -Construction of SAMs patterned surface: firstly, the TiO produced in step (1) 2 The nanofilm was placed in a n-hexane solution of 5 mM octadecyltrichlorosilane (OTS), assembled at room temperature for 1 hour, cleaned with n-hexane after taking it out, and blown dry with nitrogen. Then TiO with OTS on the surface 2 Place a mask on the nanofilm and irradiate with ultraviolet light for 10 minutes. During the process of li...

Embodiment 2

[0024] 1) TiO 2 Preparation of the film: First, immerse the glass substrate in anhydrous methanol solution of 5mM 3-aminopropyltriethoxysilane (APTS), assemble at room temperature for 3h, take it out, wash it with anhydrous methanol and secondary water successively, and blow it with nitrogen. dry; then take 0.06g Ti(SO 4 ) 2 , 0.058g H 2 o 2 and water to form a precursor solution, and adjust the pH value to about 1.6; then place the substrate with APTS on the surface in the precursor solution, and deposit at 70°C for 1h.

[0025] 2)-CH 3 / -NH 2 - Construction of SAMs patterned surface:

[0026] The method is the same as example 1.

[0027] 3) Cu 2 Preparation of S patterned thin film: 0.25g CuSO 4 .5H 2 O, 0.558g EDTA was dissolved in 50mL of water to form a transparent and clear solution, and 1M H 2 SO 4 Adjust the pH to 2.0, then add 0.248 g of Na2 S 2 o 3 , after mixing evenly, put the patterned SAMs substrate into the solution for deposition at 70°C twice, ea...

Embodiment 3

[0029] 1) TiO 2 Film preparation:

[0030] The method is the same as example 1.

[0031] 2)-CH 3 / -NH 2 - Construction of SAMs patterned surface:

[0032] The method is the same as example 1.

[0033] 3) Cu 2 Preparation of S patterned thin film: 0.125g CuSO 4 .5H 2 O, 0.279g EDTA was dissolved in 50mL of water to form a transparent and clear solution, and 1M H 2 SO 4 Adjust the pH to 1.5, then add 0.248 g of Na 2 S 2 o 3 , after mixing evenly, put the patterned SAMs substrate into the solution to deposit twice at 70°C, each time for 40 minutes. After the substrate was taken out, it was rinsed with water twice, then ultrasonically cleaned for 5 min, and dried with nitrogen, and finally the Cu 2 The S film was sintered at 300°C under the protection of nitrogen.

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Abstract

The invention discloses a patterned composite film preparation method for reinforcing photo-absorption of a titanium dioxide film. The method comprises the following steps: preparing a TiO2 nano-film on a glass substrate by using Ti(SO4)2 and H2O2 as precursor solutions; preparing a patterned self-assembled monomolecular film on the surface of the TiO2 nano-film by utilizing an ultraviolet photoetching technology; and selectively depositing Cu2S nano-crystal, and preparing the patterned Cu2S nano-film with complete pattern, clear boundary and compact structure on the surface of the TiO2 nano-film by utilizing a chemical bath method. The patterned Cu2S nano-film is used as a light absorption layer, and the TiO2 nano-film is used as an electron injecting layer to form p-n heterojunction of a patterned micro-structure Cu2S / TiO2 composite film, so the light absorption strength of the TiO2 nano-film can be effectively improved, the wavelength range of light absorption is enlarged, and the solar energy absorption efficiency of the film is further improved, thus the patterned composite film has wide application range in the fields of solar cells, photoswitches, photoelectric conversion, optical storage and the like.

Description

technical field [0001] The invention relates to the preparation technology of semiconductor patterned film, in particular to the preparation of patterned nano-Cu on the surface of titanium dioxide nano-film 2 S thin film, a composite thin film preparation technology to enhance solar light absorption efficiency. Background technique [0002] Cu 2 As a p-type semiconductor material, S has good photoelectric properties, and its forbidden band width is about 1.2eV. Take Cu 2 S is p-Cu of p-type semiconductor 2 The photoelectric conversion efficiency of S / n-CdS heterojunction solar cells can reach more than 10%, but the further development and practical application of CdS are limited due to poor stability, toxicity, and low interface carrier transfer rate. Titanium dioxide is a typical n-type semiconductor material. Due to its unique photoelectric physics, photocatalytic performance and excellent chemical stability, it has important applications in solar cells, photoelectric ...

Claims

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Application Information

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IPC IPC(8): H01L31/18H01L31/072H01L31/032
CPCY02E10/50Y02P70/50
Inventor 贾均红卢永娟
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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