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Novel method for improving quality of perovskite

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

Active Publication Date: 2016-11-23
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • 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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  • Novel method for improving quality of perovskite
  • Novel method for improving quality of perovskite

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Experimental program
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Effect test

Embodiment 1

[0025] 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. Secondly, according to the molar percentage 1:1 PbI 2 and CH 3 NH 3 I was dissolved in DMF solution to prepare a solution with a mass ratio of 40%, and then spin-coated on mesoporous TiO 2 film, heated to 100 o C, 10 min, the solvent was evaporated, and then the prepared CH 3 NH 3 PB 3 The film was fumigated with methylamine gas for 2-6s to obtain 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.

[0026] Characterize the perovskite film obtained in this embodiment and the solar cell pre...

Embodiment 2

[0028] 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. Secondly, according to the molar percentage 1:1 PbI 2 and CH 3 NH 3 I was dissolved in DMF solution to prepare a solution with a mass ratio of 40%, and then spin-coated on mesoporous TiO 2 film, heated to 100 o C, 10 min, evaporate the solvent, and then to the prepared CH 3 NH 3 PB 3 A chlorobenzene solution of methylamine was added dropwise on the film and dried naturally to obtain a dense perovskite film with good crystallinity. Finally, the hole transport layer spiro was spin-coated on the perovskite layer, and the gold electrode was evaporated to assemble a solar cell device. Such as Figure 4 The SEM of the perovskite film before and after the treatment with methylamine in chlorobenzene solution showed that the prepared perovskite film had good crystallinity.

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Abstract

The invention relates to a novel method for improving quality of perovskite. The invention belongs to a preparation method of film material and is characterized in that a perovskite film is treated with organic amine gas or organic amine solution for a certain period of time, so that the quality of the perovskite film is improved. Defects of the perovskite film can be made up effectively through treatment; surface roughness can be reduced and film forming performance is improved. The perovskite film prepared by adopting the technique provided by the invention is uniform in thickness, low in roughness and good in crystallinity. Besides, the technique is simple in operation and low in cost, and is suitable for being used for preparing efficient perovskite solar cells, LEDs, photosensitive elemtns and laser devices in a large scale.

Description

technical field [0001] The invention belongs to a preparation method of a thin film material, in particular to a new method for improving the quality of a perovskite thin film. 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 is close...

Claims

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Application Information

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IPC IPC(8): H01L51/48
CPCH10K71/00Y02E10/549
Inventor 逄淑平崔光磊周忠敏王在伟徐红霞刘志宏常悦
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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