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All-inorganic perovskite solar cell prepared based on continuous spin-coating, preparation method of solar cell and application of solar cell

A solar cell, inorganic calcium technology, applied in sustainable manufacturing/processing, circuits, electrical components, etc., can solve the problems of unfavorable battery commercialization, carrier recombination, poor battery stability, etc., and achieve excellent electron transport capability, The effect of accelerating the electron transport process and improving the battery performance

Inactive Publication Date: 2018-01-12
OCEAN UNIV OF CHINA
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  • Abstract
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Problems solved by technology

Although the photoelectric conversion efficiency of the current cell has reached the basic requirements of commercialization, there are still two problems: First, due to the hole transport materials (such as Spiro-OMeTAD) and the traditional perovskite materials (such as MAPbI 3 ) caused poor stability of the battery; secondly, the energy level barrier existing between the carrier transport layer / perovskite layer interface caused severe carrier recombination inside the battery
The above two problems are not conducive to the commercial application of this type of battery. Therefore, it is of great theoretical significance and practical value to develop a stable perovskite solar cell without hole transport materials with simple preparation methods.

Method used

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Embodiment 1

[0039] The preparation method of the all-inorganic perovskite solar cell prepared based on continuous spin coating of the present invention comprises the following steps:

[0040] 1. Dissolve natural graphite powder, sodium nitrate and potassium permanganate in concentrated sulfuric acid at a mass ratio of 1~2:1:5~8 under ice bath conditions, and stir for 5~10 minutes;

[0041] 2. Remove the ice bath, heat the solution to 35°C, stir for 30 minutes, add 60-100 mL of deionized water and 3% hydrogen peroxide until the bubbles disappear;

[0042] 3. Centrifuge and wash the solution until the pH of the supernatant is 3-4, disperse the mixture in water again and sonicate for 20 minutes, and remove the black residue after centrifugation for 3 minutes to obtain a uniform suspension;

[0043] 4. Freeze-dry the suspension for 48 hours to obtain fluffy solid graphene oxide;

[0044] 5. Prepare graphene oxide into 9 mg / mL dimethylformamide solution (graphene oxide is the solute and dimet...

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Abstract

The invention provides an all-inorganic perovskite solar cell prepared based on continuous spin-coating, a preparation method of the solar cell and an application of the solar cell. Particularly, electron transport materials are deposited on FTO (functional test objective) or ITO (indium tin oxide) conductive glass to form a uniform mesoporous film, continuous spin-coating of precursor solution ofperovskite materials to form a perovskite layer with excellent crystallinity, and finally, back electrode materials are deposited to assemble the all-inorganic perovskite solar cell. The interface energy level structure of the electron transport materials and the perovskite layer is optimized, and the photoelectric conversion efficiency and stability of the cell are improved. Besides, the solar cell has the advantages of simple preparation method, no hole transport layer, low cost and large improvement space.

Description

technical field [0001] The invention belongs to the field of new material technology and new energy technology, and specifically relates to an all-inorganic perovskite solar cell prepared based on continuous spin coating, a preparation method and application thereof. Background technique [0002] Perovskite solar cells are a new type of thin-film solar cells with mesoscopic structure developed based on solid-state dye-sensitized solar cells in recent years. [0003] The working principle of the battery is: the perovskite layer absorbs photons, the electrons in its valence band jump to the conduction band, and the electrons and holes flow to the conduction band of the electron transport layer and the valence band of the hole transport layer respectively, thus realizing electron-hole Separation of hole pairs. Although the photoelectric conversion efficiency of the current cell has reached the basic requirements of commercialization, there are still two problems: First, due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 唐群委段加龙赵媛媛段艳艳贺本林陈海燕
Owner OCEAN UNIV OF CHINA
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