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A method for preparing surface-modified ceo2 nanomaterials, as well as products and applications

A nanomaterial and surface modification technology, applied in nanotechnology, semiconductor/solid-state device manufacturing, semiconductor devices, etc., can solve the problems of low carrier mobility, poor chemical stability, high cost, and achieve high carrier mobility. efficiency, simple preparation method, and simple mechanical properties

Active Publication Date: 2019-03-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems of low carrier mobility, poor chemical stability, easy degradation in water and oxygen environment, and high cost of the electron transport layer in the prior art, the present invention provides a surface-modified highly dispersed CeO 2 The preparation method, product and application of nanomaterials, the method of the present invention has simple process, and the prepared CeO 2 Nanomaterials have high conductivity, high carrier mobility, good chemical stability, and energy levels that match perovskite light-absorbing materials, which can ensure the photoelectric conversion efficiency of battery devices and greatly improve the long-term stability of devices

Method used

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  • A method for preparing surface-modified ceo2 nanomaterials, as well as products and applications
  • A method for preparing surface-modified ceo2 nanomaterials, as well as products and applications
  • A method for preparing surface-modified ceo2 nanomaterials, as well as products and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Embodiment 1, comprises the steps:

[0076] (1) Weigh cerium nitrate hexahydrate and dissolve it in distilled water to configure a concentration of 17mmol / L, and add tert-butylamine dropwise under the condition of an ice-water bath until the pH is 8;

[0077] (2) Take 150 milliliters of the solution described in step (1) and add it to a 500 milliliter reaction kettle, add oleic acid, configure the precursor solution protected by oleic acid with a molar ratio of oleic acid and cerium ion of 10:1, and protect it by oleic acid The volume ratio of precursor solution and toluene is 1:1, add toluene (you can replace toluene with benzene, n-hexane, carbon tetrachloride or dichloromethane), let stand without stirring;

[0078] (3) Move the reaction kettle filled with about 60% of the step (2) into an oven with a constant temperature of 180 degrees Celsius, react for 24 hours and cool to room temperature, take it out, take the upper layer of brown clear liquid to obtain the tolu...

Embodiment 2

[0087] Embodiment 2, comprises the steps:

[0088] (1) Steps for configuring the modified cerium oxide solution: disperse the cerium oxide slurry described in step (11) of Example 1 in an ethanol solvent to obtain a modified cerium oxide solution.

[0089] (2) Cleaning steps: select indium-doped tin oxide (ITO) glass with a square resistance of 5-25 ohms and a transmittance of 70%-90% as the substrate, and then clean it with detergent, distilled water, ethanol and acetone in sequence , treated with oxygen plasma beam for 10 minutes after nitrogen drying;

[0090] (3) Preparation of the modified cerium oxide film: get 70 microliters of the solution described in step (1) and spin-coat it on the surface of the indium-doped tin oxide (ITO) described in step (2), at a speed of 5000 revolutions per minute After the solution was spin-coated at a high speed for 30 seconds, it was placed on a hot stage at 80 degrees Celsius and heated for 10 minutes to obtain a modified cerium oxide f...

Embodiment 3

[0101] Embodiment 3 is used to prepare a battery device for a formal planar perovskite solar cell, comprising the following steps:

[0102] (1) Cleaning steps: select indium-doped tin oxide (ITO) glass with a square resistance of 5-25 ohms and a transmittance of 70%-90% as the substrate, and then clean it with detergent, distilled water, ethanol and acetone in sequence , treated with oxygen plasma beam for 10 minutes after nitrogen drying;

[0103](2) Preparation of the electron transport layer solution: take the cerium oxide slurry described in step (11) of Example 1, disperse it in a chlorobenzene solvent at a mass concentration of 5 mg per milliliter, stir at room temperature until completely dispersed, and obtain the cerium oxide slurry Chlorobenzene solution of cerium.

[0104] (3) Preparation of the electron transport layer: get the solution described in step (2) and spin-coat it on the ITO substrate described in step (1), after spinning the solution for 30 seconds at a...

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Abstract

The invention discloses a method for preparing surface-modified CeO 2 The method, product and application of nanomaterials belong to the field of perovskite solar cells. Its method comprises: S1 prepares the CeO of oleic acid wrapping 2 Nanoparticles; S2 oleic acid-coated CeO 2 Nanoparticles dispersed in toluene solution; S3 towards CeO coated with oleic acid 2 Alkaline solvent was added to the toluene solution to carry out the desorption reaction. After the desorption was completed, it was centrifuged and washed to obtain milky yellow CeO 2 Particles; S4 uses acetylacetone to milky yellow CeO 2 Particles were modified; S5 modified CeO with acetylacetone 2 The solution was distilled under reduced pressure to remove excess acetylacetone solvent. The present invention also provides CeO modified with acetylacetone 2 A method for preparing perovskite solar cells with different structures from nanomaterials. The inventive method process is simple, and the prepared modified CeO 2 Nanomaterials have excellent properties and can be used in perovskite solar cells.

Description

technical field [0001] The invention belongs to the technical field of perovskite solar cells, in particular to the preparation of surface-modified CeO 2 Nanomaterials and methods for related solar cells. Background technique [0002] Coal, oil, natural gas, etc. are non-renewable energy sources, which will always be exhausted one day. In order to maintain sustained, stable and rapid economic growth, we will face severe energy problems. As the main source of energy for the earth, solar energy is abundant, clean and renewable. Governments of all countries will study solar cells based on photoelectric conversion, especially cheap solar cell technology, as an important part of the national sustainable development strategy and an important trend in the development of new energy technologies. [0003] In recent years, perovskite solar cells have developed rapidly and have attracted extensive attention from energy workers. Its highest photoelectric conversion efficiency exceed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/48H01L51/46B82Y40/00
CPCB82Y40/00H10K71/00H10K30/00H10K2102/00Y02E10/549
Inventor 陈炜方睿
Owner HUAZHONG UNIV OF SCI & TECH
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