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Stannic dioxide/graphdiyne compound interface layer and preparation and application thereof

A technology of tin dioxide and graphdiyne, which is applied in the manufacture of tin oxide, graphite, semiconductor/solid-state devices, etc., can solve the problems of reducing the performance of perovskite solar cells, the interface layer is not dense, and the wettability is poor. Improve the effect of interface charge transfer efficiency, good conductivity, overall efficiency and stability

Pending Publication Date: 2020-02-21
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the interface layer based on tin dioxide electron transport materials is usually not dense, the surface is rough, and the wettability is poor. These shortcomings seriously affect the charge extraction and transport between the interfaces and reduce the performance of perovskite solar cells.

Method used

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  • Stannic dioxide/graphdiyne compound interface layer and preparation and application thereof
  • Stannic dioxide/graphdiyne compound interface layer and preparation and application thereof
  • Stannic dioxide/graphdiyne compound interface layer and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation of graphyne / tin dioxide composite

[0048] Weigh 3.50 grams of tin chloride pentahydrate with a balance, put it into a 200 ml beaker, then measure 30 ml of absolute ethanol and 30 ml of deionized water, mix them evenly, and slowly inject them into the beaker with tin chloride pentahydrate in, stir to dissolve tin chloride pentahydrate; draw 22 milliliters of tetramethylammonium hydroxide with a pipette gun and pour it into a 100 milliliter beaker, then measure 38 milliliters of deionized water to dilute tetramethylammonium hydroxide to 60 milliliters; finally Inject 60 milliliters of diluted tetramethylammonium hydroxide solution into a beaker filled with tin chloride pentahydrate solution, stir until the solution is clear, then pour the mixed solution into a 150 milliliter hydrothermal reaction kettle liner, and water Heat reaction for 12 hours; after the reaction, the product was centrifuged and washed three times with absolute ethanol, and then vacuum-dri...

Embodiment 2

[0056] Fabrication of graphyne / tin dioxide composite interfacial layer perovskite batteries

[0057] Step 1): The glass sheet etched with indium tin oxide (ITO) electrodes on the surface is ultrasonically cleaned with detergent, deionized water, anhydrous acetone, and anhydrous isopropanol for 30 minutes each, and then the cleaned ITO The glass slides were cleaned with ozone plasma for 15 minutes, and then the ITO glass slides were blown dry for later use.

[0058] Step 2): spin-coat the P3CT-K solution prepared in advance on the ITO glass sheet, the spin-coating speed is 3000 rpm, and the spin-coating time is 1 minute, and then the glass sheet with the P3CT-K film is spin-coated at 140 ° C Heat on a hot plate for 30 minutes, then remove and cool to room temperature for later use.

[0059] The preparation process of P3CT-K solution is as follows: Weigh 40 mg of P3CT powder in a 4 ml screw bottle, then inject 4 ml of potassium hydroxide aqueous solution with a concentration of...

Embodiment 3

[0076] Example 3 is basically the same as Example 2, except that the perovskite cell preparation step 3 and the interdoping ratio of graphyne / tin dioxide in the corresponding interface layer are 1:3.

[0077] Step 3): Add 90 microliters of methylamine lead iodine precursor solution dropwise on the surface of the P3CT-K film prepared in step 2, spin-coat at 4000 rpm for 60 seconds, and drop 300 microliters of chlorobenzene solution in 8 seconds, Afterwards, the methylamine lead-iodine film was burned to caramel color on a heating plate at 60° C., and then burned to black on a heating plate at 80° C., wherein the heating time on the heating plate at 80° C. was 5 minutes.

[0078] The photoelectric performance test results show that the highest forward-scan efficiency of the fabricated perovskite cell is 19.8%.

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Abstract

The invention belongs to the field of inorganic functional materials, and relates to a stannic oxide / graphdiyne compound interface layer and preparation and application thereof. The compound is formedby embedding monodisperse stannic dioxide particles into a graphdiyne net structure; wherein the doping mass of graphdiyne in the compound is 0.1-50%. Graphdiyne is used for doping and modifying stannic dioxide, so that a composite electron transport material with good conductivity and high stability is obtained; when the composite electron transport material is applied to perovskite solar cells,the performance of the perovskite solar cells is further improved, and meanwhile, the large-scale commercialization of the composite electron transport material can be realized.

Description

technical field [0001] The invention belongs to the field of inorganic functional materials, and relates to a tin dioxide / graphyne composite interface layer and its preparation and application. Background technique [0002] Perovskite solar cells are a new type of solar cells, which have the advantages of suitable direct bandgap, wide absorption range, excellent charge mobility, long charge diffusion length, and high defect tolerance. At present, the photoelectric conversion efficiency of perovskite solar cells has exceeded 24%, which is basically close to the level of polycrystalline silicon solar cells for large-scale commercial applications. However, the charge transport in this type of solar cell is extremely unbalanced, which tends to cause charge accumulation in the battery and produce a "hysteresis effect", which reduces the performance of the battery. Therefore, it is an effective means to effectively solve the hysteresis effect and improve the battery performance b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/21C01G19/02H01L51/42H01L51/46H01L51/48
CPCC01B32/21C01G19/02C01P2002/34C01P2004/01C01P2004/03C01P2004/04C01P2006/40H10K30/15H10K2102/00H10K2102/102Y02E10/549
Inventor 酒同钢姚权桐赵敏
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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