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Preparation method of organic-inorganic hybrid perovskite thin film

A technology of perovskite and perovskite precursors, which is applied in semiconductor/solid-state device manufacturing, electrical components, electrical solid-state devices, etc., can solve problems such as increasing the risk of experimental failure, and achieve simple operation, low cost, and process. Simple process effect

Pending Publication Date: 2022-04-19
SHANGHAI INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This undoubtedly puts forward higher requirements for the experimenters and the experimental environment, and also increases the risk of experimental failure to a certain extent.

Method used

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  • Preparation method of organic-inorganic hybrid perovskite thin film
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  • Preparation method of organic-inorganic hybrid perovskite thin film

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preparation example Construction

[0034] A method for preparing an organic-inorganic hybrid perovskite film, the method comprising the following steps:

[0035] First, the PbI 2 The powder and the PEAI powder were added to the solvent in turn, and stirred for 10-20 minutes to fully dissolve it to obtain (PEA) 2 PB 4 Perovskite precursor solution; the solvent is a polar solvent, including N,N-dimethylformamide (DMF), γ-butyrolactone or dimethyl sulfoxide (DMSO). (PEA) 2 PB 4 PbI in perovskite precursor solution 2 and PEAI concentrations were 0.8-1.2mol / L and 1.6-2.4mol / L. PB 2 The ratio of the amount of substance to PEAI is preferably 1:2.

[0036] Then, the prepared (PEA) 2 PB 4 The perovskite precursor solution is dripped on the cleaned substrate material, and the substrate material includes ordinary glass, ITO glass, FTO glass or sapphire. (PEA) was spin-coated 2 PB 4 The perovskite precursor solution is evenly coated, and the solvent is evaporated by natural drying to obtain (PEA) 2 PB 4Organi...

Embodiment 1

[0038] A preparation method of an organic-inorganic hybrid perovskite film, specifically comprising the steps of:

[0039] (1) First according to PbI 2 : The molar ratio of PEAI=1:2 takes by weighing 0.6915g and 0.747g respectively, joins in the gamma-butyrolactone of 1mL successively to form a solution, stirs 10-20min, utilizes solution method to make PbI 2 React with PEAI to dissolve completely, forming a yellow transparent, slightly viscous precursor solution;

[0040] (2) Use a pipette gun to extract 1 μL of the perovskite precursor solution prepared in step (1), and then drop it on a common glass substrate that is cleaned with ethanol and γ-butyrolactone in sequence. Set the initial spin-coating speed to 500rpm. After 90 seconds of spin-coating, increase the spin-coating speed to 800-1000rpm, and continue to spin-coat for 120 seconds. During this process, it is gradually seen that yellow crystals start to precipitate on the film substrate, and then increase again. Spin ...

Embodiment 2

[0048] A preparation method of an organic-inorganic hybrid perovskite film, specifically comprising the steps of:

[0049] (1) First according to PbI 2 : The ratio of PEAI=1:2 takes by weighing 0.461g and 0.498g respectively, joins in the gamma-butyrolactone solvent of 1mL successively, stirs 10-20min, makes PbI 2 Dissolve PEAI and γ-butyrolactone in γ-butyrolactone completely, and generate a yellow and transparent precursor solution with a concentration of 1mol / L after fully reacting;

[0050] (2) Add a little of the perovskite precursor solution prepared in step (1) dropwise on the common glass substrate cleaned with ethanol and γ-butyrolactone in sequence. The initial spin-coating speed is 500rpm. After 90 seconds of spin-coating, increase the spin-coating speed to 800-1000rpm, continue to spin-coat for 120 seconds, then gradually increase the spin-coating speed to 2000rpm, and continue to spin-coat for 60 seconds. After the end, reduce the spin-coating speed until the sp...

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Abstract

The invention relates to a preparation method of an organic-inorganic hybrid perovskite film, which comprises the following steps of: firstly, sequentially adding a certain amount of PbI2 powder and PEAI powder into a solvent in proportion, and stirring in a beaker at room temperature to fully dissolve the PbI2 powder and the PEAI powder to prepare a (PEA) 2PbI4 perovskite precursor solution; and then dropwise adding the prepared (PEA) 2PbI4 precursor solution on a cleaned film substrate, uniformly coating the perovskite precursor solution on the substrate by using a spin-coating method, and naturally drying to obtain the (PEA) 2PbI4 perovskite film. The PEA 2PbI4 perovskite thin film prepared by the method has the characteristics of high crystal quality, large grain size and low defect density, and can be used in the fields of photoelectric display, solar cells, photoelectric detectors and the like.

Description

technical field [0001] The invention relates to the field of perovskite materials, in particular to a method for preparing an organic-inorganic hybrid perovskite film. Background technique [0002] As a new type of composite functional material, organic-inorganic hybrid perovskite combines the diversity of organic material structures with the advantages of high carrier mobility of inorganic semiconductor materials, and has strong light absorption ability and high extinction coefficient. , long carrier diffusion distance, and excellent photoluminescence characteristics have attracted widespread attention in the fields of lighting displays, photodetectors, and solar cells. [0003] The larger organic cations in organic-inorganic hybrid perovskite materials act as spacers on the one hand, isolating the octahedral layer of inorganic metal halides, forming a quantum well superlattice structure on the energy band, and the organic cations serve as insulating barriers to separate th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/00H10K99/00
CPCH10K71/12H10K71/15
Inventor 张灿云任恩亮刘亚楠王凤超陈进孔晋芳李澜张彦
Owner SHANGHAI INST OF TECH
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