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Photoanode containing two-dimensional nano-crystal photonic crystal light-scattering layer and manufacturing method thereof

A photonic crystal and two-dimensional nanotechnology, which is applied in the field of solar cells, can solve problems such as the difficulty in preparing thick two-dimensional nanocrystalline photonic crystal films, and achieve the effects of macroscopically large-area controllable, simple process, and easy-to-operate process

Active Publication Date: 2015-12-02
SHAANXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Another object of the present invention is to provide a method for preparing the photoanode containing the two-dimensional nanocrystalline photonic crystal scattering layer, which solves the problem that the existing preparation method is difficult to prepare a thicker two-dimensional nanocrystalline photonic crystal film

Method used

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  • Photoanode containing two-dimensional nano-crystal photonic crystal light-scattering layer and manufacturing method thereof
  • Photoanode containing two-dimensional nano-crystal photonic crystal light-scattering layer and manufacturing method thereof
  • Photoanode containing two-dimensional nano-crystal photonic crystal light-scattering layer and manufacturing method thereof

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preparation example Construction

[0046] Therefore, the present invention also provides a method for preparing the photoanode containing the above-mentioned two-dimensional nanocrystalline photonic crystal scattering layer based on micro-extrusion technology, comprising the following steps:

[0047] Step 1, preparing nanocrystalline slurry

[0048] First, the nanocrystals are uniformly dispersed in ethanol by stirring and ultrasonic (1g nanocrystals correspond to about 20mL ethanol) to obtain nanocrystal colloids; Partially volatilize the ethanol under the conditions to obtain a nanocrystalline slurry with a viscosity suitable for screen printing, and set aside; take part of the slurry and dilute it with ethanol, obtain a stable nanocrystalline emulsion suspension after ultrasonication, and set aside.

[0049] The nanocrystals used in the present invention can be prepared through experiments, such as synthesized by a hydrothermal method, or can be purchased from the market. The present invention does not limit...

Embodiment 1

[0066] This example prepared a two-dimensional TiO 2 The nanocrystalline photonic crystal scattering layer used to sensitize the photoanode of the solar cell is prepared according to the following steps.

[0067] Step 1, prepare TiO 2 Nanocrystalline

[0068] Titanium tetrachloride (TiCl 4 ) was added slowly (1mL / min) into ice water at 0°C under stirring to prepare a concentration of 0.44mmol / mLTiCl 4 Aqueous solution, using KOH aqueous solution to adjust the pH to 7.1; then transfer 60mL of the raw material solution that was uniformly stirred in an ice bath to a 100mL reaction kettle, and place it in a blast drying oven at 200°C for 5 hours; then cool the reacted The product is left to stand for a period of time, the supernatant is removed, and the precipitate is TiO with a particle size of about 10nm 2 Nanocrystals were cleaned with acetic acid-ammonium acetate buffer solution, and dispersed in ethanol by ultrasonic and mechanical stirring to obtain paste-like TiO 2 Nan...

Embodiment 2

[0078] In this embodiment, a photoanode for sensitizing solar cells containing a two-dimensional ZnO nanocrystalline photonic crystal scattering layer is prepared.

[0079] Step 1, preparation of ZnO nanocrystals

[0080] First, 0.82gZn(Ac) 2 2H 2 O and 0.49gKOH were dissolved in 42mL and 23mL of methanol, after fully stirring Zn(Ac) 2 The precursor solution was transferred to a three-necked flask, heated and stirred in a 60°C water bath to fully dissolve; then the KOH precursor solution was added dropwise with a small disposable needle to obtain a transparent light blue reaction solution, and the particle size was about 20nm after reflux and stirring for 5 hours The ZnO nanocrystals are washed by methanol centrifugation for 3-4 times, and then the washed ZnO nanocrystals are dispersed in ethanol to obtain pasty ZnO nanocrystal ethanol colloids.

[0081] Step 2, prepare ZnO nanocrystalline slurry

[0082] First, weigh the pasty ZnO nanocrystal ethanol colloid containing 1g...

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Abstract

The invention discloses a photoanode containing a two-dimensional nano-crystal photonic crystal light-scattering layer, wherein a compact layer, a two-dimensional nano-crystal photonic crystal light-scattering layer and a mesoporous nanocrystalline layer are successively arranged on an FTO glass substrate from bottom to top. The invention also discloses a manufacturing method of the photoanode containing the two-dimensional nano-crystal photonic crystal light-scattering layer. According to the method, firstly, a nanocrystalline colloidal film is formed through the micro extrusion process on a PDMS soft template, and structurally integrated two-dimensional nano-crystal photonic crystals of periodic microstructures are prepared. Secondly, a nanocrystalline film is prepared on the two-dimensional nano-crystal photonic crystals through the silk-screen printing process. After the high-temperature annealing step, a mesoporous nanocrystalline photoanode provided with the two-dimensional photonic crystal light-scattering layer is obtained. Based on the above manufacturing method, structurally integrated, macroscopically large-area and thickness-controllable photonic crystals can be prepared. The method is simple and low in cost. The photoanode prepared by the method is higher in photoelectric conversion efficiency and battery efficiency.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a photoanode containing a two-dimensional nanocrystal photonic crystal scattering layer and a preparation method thereof. Background technique [0002] In recent years, with the continuous increase of people's demand for energy and the continuous reduction of fossil fuel reserves, it has become one of the important topics of current scientific research to find a new source of abundant, green and environmentally friendly alternative energy. As an inexhaustible natural energy source, solar energy has been paid more and more attention by people, especially the research on solar cells that directly convert solar energy into electrical energy has become a research hotspot. [0003] Sensitized solar cells are the third generation of solar cells that appeared in the 1990s. Before the 1990s, due to the generally low photoelectric conversion efficiency, they were not taken...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G9/048H01G9/20
Inventor 邓建平
Owner SHAANXI UNIV OF TECH
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