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

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: 2022-07-26
OCEAN UNIV OF CHINA
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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
  • Perovskite solar cell based on halogenated oxyhydroxide quantum dot interface layer and preparation method
  • Perovskite solar cell based on halogenated oxyhydroxide quantum dot interface layer and preparation method

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Embodiment 1

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

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

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

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

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Abstract

The invention provides a perovskite solar cell based on the interface layer of halogenated oxyhydroxide quantum dots and a preparation method, in particular, the halogenated oxyhydroxide quantum dots are prepared by a solution method, and are spin-coated on an electron transport layer supported by conductive glass The surface is used as an interface modification layer, and then a perovskite light-absorbing layer is prepared by liquid-phase spin coating, and a carbon back electrode is deposited by coating method to make a perovskite solar cell. The invention utilizes the group chemical properties, high electrical conductivity and tunability of the energy band structure of the halogenated oxyhydroxide quantum dots, on the one hand, passivates the surface defects of the electron transport layer and the perovskite layer, improves the quality of the perovskite film, and increases the number of electrons. The migration rate and reduction of carrier recombination, on the other hand, promote electron transfer and improve interfacial energy level alignment, enhance charge extraction and reduce energy loss, effectively improving the efficiency and stability of perovskite solar cells. The preparation technology of the invention is simple, the raw materials are cheap and easy to obtain, the material optimization and improvement space is large, and the invention has a great application prospect.

Description

technical field [0001] The invention belongs to the fields of new material technology and new energy technology, and particularly relates to the application and preparation method of halogenated oxyhydroxide quantum dots as interface modification layers in perovskite solar cells. Background technique [0002] In recent years, the over-exploitation and use of traditional fossil energy has not only caused huge pollution to the environment but also caused 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 extensive attention from researchers all over the world. 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 tunable band gap. [0003] In perovskite solar cells, the electron transpo...

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Application Information

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Patent Type & Authority Patents(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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