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A method for manufacturing a high-quality perovskite thin film

A technology of perovskite and a new method, applied in the field of preparing high-quality perovskite thin films, can solve problems such as increasing the cost of perovskite and limiting the large-scale preparation of perovskite thin films

Active Publication Date: 2015-11-04
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

The perovskite film prepared by the vapor-assisted solution method combined with the evaporation method and the solution method has good crystallinity and film-forming properties, but this evaporation and high temperature process increase the cost of preparing perovskite, thus limiting Large-Scale Fabrication of Perovskite Thin Films

Method used

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  • A method for manufacturing a high-quality perovskite thin film
  • A method for manufacturing a high-quality perovskite thin film

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Embodiment 1

[0019] First, TiO was prepared by sol-gel method 2 Colloid, spin-coated on the cleaned FTO glass, then 500 o C heat treatment for 30 min to obtain dense TiO 2 film. Spin-coating TiO on dense thin films 2 Slurry, TiO 2 particle size ~20 nm, and then a further 500 o C heat treatment for 30 min to obtain TiO 2 mesoporous film. Preparation of MAPbI by Antisolvent Method 3 Perovskite crystals, and then place the crystals in an atmosphere of methylamine gas to obtain a perovskite liquid phase with excess methylamine, and then use a scraper rod to scrape this liquid phase onto the mesoporous TiO 2 film, heated to 100 o C, 10 min, to promote the volatilization of methylamine gas, and prepare a dense perovskite film with good crystallinity. Finally, the hole transport layer spiro was spin-coated on the perovskite layer, and the silver electrode was vapor-deposited to assemble a solar cell device.

[0020] Characterize the perovskite film obtained in this embodiment and the so...

Embodiment 2

[0022] First, TiO was prepared by sol-gel method 2 Colloid, spin-coated on the cleaned FTO glass, then 500 o C heat treatment for 30 min to obtain dense TiO 2 film. Spin-coating TiO on dense thin films 2 Slurry, TiO 2 particle size ~20 nm, and then a further 500 o C heat treatment for 30 min to obtain TiO 2 mesoporous film. Will NH 4 I and PbI 2 According to the molar ratio of 1:1, it is configured into a DMF solution with a solute content of 50%, and then at 80 o The solvent was dried under vacuum at C to obtain NH 4 PB 3 powder, then NH 4 PB 3 The powder was placed in an atmosphere of methylamine gas to obtain a perovskite liquid phase with excess methylamine, which was then spin-coated onto mesoporous TiO 2 On the membrane, place it for 1h to completely volatilize the methylamine gas, and prepare dense MAPbI with good crystallinity 3 perovskite thin film. Finally, the hole transport layer spiro was spin-coated on the perovskite layer, and the silver electrode...

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Abstract

The invention relates a method for manufacturing a high-quality perovskite thin film. The main steps are that organic amine treatment is carried out on powder or crystals of a precursor of perovskite, and then the powder or the crystals of the precursor of the perovskite are converted into liquids. The liquids are subjected to film forming technology to manufacture the high-quality perovskite thin film. The perovskite thin film manufactured through utilization of the technical process is controllable and uniform in thickness and good in crystallinity. The technical process is simple in operation and lower in cost, and is applicable to manufacturing highly efficient perovskite solar cells, light emitting diodes, photosensitive elements and laser devices in a large-sized mode.

Description

technical field [0001] The invention belongs to a method for preparing thin film materials, and in particular relates to a new method for preparing high-quality perovskite thin films. Background technique [0002] Organic-inorganic hybrid perovskite has attracted much attention due to its unique optical, electrical, and magnetic properties, as well as simple preparation process, less raw material consumption, and low cost, especially since it was first applied to solar energy in 2009. Since the battery, perovskite solar cells have risen rapidly from 3.8% to the current 20.1%, and perovskite has also received widespread attention in the fields of diodes and laser devices. In these devices, the perovskite active material is the core part, and the quality of the perovskite film is a key factor affecting the performance of the device. Therefore, the research on the film-forming properties of perovskite is of great significance. [0003] The film-forming property of perovskite i...

Claims

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Application Information

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IPC IPC(8): H01L51/00H01L51/42
CPCH10K71/12H10K30/151Y02E10/549
Inventor 崔光磊逄淑平王在伟周忠敏徐红霞刘志宏常悦
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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