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Perovskite solar cell based on halogenated oxyhydroxide quantum dot interface layer and preparation method thereof

A technology of halogenated hydroxyl and solar cells, which is applied in the field of new material technology and new energy, can solve the problems of small interface energy level arrangement, increase battery internal resistance, single function, etc., and achieve large grain size and grain boundary quantity The effect of less and simple preparation technology

Active Publication Date: 2021-07-27
OCEAN UNIV OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these compounds have single functions, poor conductivity, increase the internal resistance of the battery, and have little effect on improving the alignment of interface energy levels.

Method used

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  • Perovskite solar cell based on halogenated oxyhydroxide quantum dot interface layer and preparation method thereof
  • Perovskite solar cell based on halogenated oxyhydroxide quantum dot interface layer and preparation method thereof
  • Perovskite solar cell based on halogenated oxyhydroxide quantum dot interface layer and preparation method thereof

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Embodiment 1

[0035] 1. Add 2 mmol FeCl 3 •6H 2 O and 6 mmol NH 4 HCO 3 Disperse in 50 mL of ethanol and stir at 20°C for 12 hours at a stirring speed of 1000 rpm;

[0036] 2. The resulting mixed solution was centrifuged at a speed of 10,000 rpm for 10 minutes, the product was collected, washed 3 times with deionized water, and freeze-dried (48 h) to obtain a FeOOH quantum dot sample;

[0037] 3. Disperse 30 mg FeOOH quantum dots in 10 mL, 3 mol / L NaF aqueous solution, stir at 20 degrees for 24 hours, and the stirring speed is 1500 rpm;

[0038] 4. The resulting mixed solution was centrifuged at 10,000 rpm for 10 minutes, the product was collected, washed 3 times with deionized water, and freeze-dried (48 h) to obtain FeOOH (F) quantum dot samples; take 5 mg FeOOH (F) Quantum dots were dispersed in 10 mL of ethanol to obtain FeOOH(F) quantum dot interface modification layer precursor at a concentration of 0.5 mg / mL;

[0039] 5. Prepare 0.6 mol / L concentration of isopropyl titanate etha...

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Abstract

The invention provides a perovskite solar cell based on a halogenated oxyhydroxide quantum dot interface layer and a preparation method thereof, and specifically, the preparation method comprises the following steps of preparing halogenated oxyhydroxide quantum dots by adopting a solution method, spin-coating the halogenated oxyhydroxide quantum dots on the surface of a conductive glass loaded electron transport layer as an interface modification layer, and then preparing a perovskite light absorption layer by liquid-phase spin-coating, and depositing a carbon back electrode by a coating method to prepare the perovskite solar cell. According to the present invention, the group chemical characteristics, high conductivity and energy band structure adjustability of the halogen oxyhydroxide quantum dots are utilized, on one hand, the surface defects of the electron transport layer and the perovskite layer are passivated, the quality of a perovskite thin film is improved, the electron migration rate is increased, and carrier recombination is reduced, and on the other hand, electron transfer is promoted, the interface energy level arrangement is improved, the charge extraction is enhanced, the energy loss is reduced, and the efficiency and stability of the perovskite solar cell are effectively improved. The preparation technology is simple, the raw materials are cheap and easy to obtain, the material optimization and improvement space is large, and the perovskite solar cell has great application prospect.

Description

technical field [0001] The invention belongs to the field of new material technology and new energy technology, and specifically relates to the application and preparation method of halogenated oxyhydroxide quantum dots as an interface modification layer in perovskite solar cells. Background technique [0002] In recent years, the excessive exploitation and use of traditional fossil energy has not only brought huge pollution to the environment but also triggered an energy crisis. As a renewable and clean energy, solar energy is of great significance to solve the energy crisis. In this context, the development of new high-efficiency and low-cost solar cells has attracted widespread attention of researchers from various countries. Among many solar cells, perovskite solar cells have important application prospects in the field of optoelectronics due to their good light absorption, excellent charge transfer rate, and adjustable band gap. [0003] In perovskite solar cells, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/12H10K71/15H10K30/00Y02E10/549
Inventor 贺本林崔沥方陈海燕
Owner OCEAN UNIV OF CHINA
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