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Two-dimensional organic-inorganic hybrid perovskite thin film material with vertical alignment structure

A vertically oriented, thin-film material technology, used in semiconductor devices, electrical components, circuits, etc., to solve problems such as barriers to charge transfer due to insulating properties

Active Publication Date: 2019-08-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Two-dimensional organic-inorganic hybrid perovskite materials based on lead iodide and their solar cells have been reported in the literature. However, due to the characteristic that the two-dimensional structure tends to grow along the substrate crystal, the formation of monovalent large-sized organic ammonium The molecular layer arranged parallel to the substrate, its insulating properties become an obstacle to the charge transport in the direction perpendicular to the substrate, which greatly reduces the current in the vertical direction of the optoelectronic device using this type of material as the active layer, and limits the use of this type of material in related optoelectronics. device application

Method used

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Embodiment 1

[0020] The ITO glass substrate was ultrasonically washed with detergent, acetone, isopropanol and ethanol for 5 minutes, rinsed with deionized water and dried. After UV-ozone treatment, a PEDOT:PSS layer with a thickness of about 40 nm was prepared by spin coating, baked at 140° C. for 15 minutes, and then taken out. Mix and dissolve formamidine hydriodide, n-butylamine hydriodide, lead iodide, and ammonium thiocyanate in N,N-dimethylformamide, lead iodide and N,N-dimethylformamide The proportioning ratio of amide is 100 mg: 1 milliliter, formamidine hydroiodide: n-butylamine hydroiodide: lead iodide: ammonium thiocyanate (molar ratio) is 2:2:3:10, stir overnight, Obtain the precursor solution; adopt the method of solution spin coating, take the precursor solution and spin-coat it on the PEDOT:PSS layer to form a film, the rotation speed is 2000 rpm, the rotation time is 60 seconds, and annealed at 70 ° C for 20 minutes to obtain a vertically oriented structure. Two-dimension...

Embodiment 2

[0022] The ITO glass substrate was ultrasonically washed with detergent, acetone, isopropanol and ethanol for 5 minutes, rinsed with deionized water and dried. After UV-ozone treatment, a PEDOT:PSS layer with a thickness of about 40 nm was prepared by spin coating, baked at 140° C. for 15 minutes, and then taken out. Mix and dissolve formamidine hydriodide, phenethylamine hydriodide, lead iodide, and ammonium thiocyanate in N,N-dimethylformamide, lead iodide and N,N-dimethylformamide The proportioning ratio of amide is 800 mg: 1 milliliter, formamidine hydroiodide: phenethylamine hydroiodide: lead iodide: ammonium thiocyanate (molar ratio) is 2:2:3:1, stir overnight, Obtain the precursor solution; use the method of solution spin coating, take the precursor solution and spin-coat it on the PEDOT:PSS layer to form a film, the rotation speed is 8000 rpm, the rotation time is 10 seconds, and annealed at 150 ° C for 5 minutes to obtain a vertically oriented structure. Two-dimensio...

Embodiment 3

[0024] The ITO glass substrate was ultrasonically washed with detergent, acetone, isopropanol and ethanol for 5 minutes, rinsed with deionized water and dried. After UV-ozone treatment, a PEDOT:PSS layer with a thickness of about 40 nm was prepared by spin coating, baked at 140° C. for 15 minutes, and then taken out. Mix and dissolve formamidine hydriodide, n-butylamine hydriodide, lead iodide, and ammonium chloride in N,N-dimethylformamide, lead iodide and N,N-dimethylformamide The proportioning ratio is 500 mg: 1 milliliter, formamidine hydroiodide: n-butylamine hydroiodide: lead iodide: ammonium chloride (molar ratio) is 2:2:3:0.01, stir overnight, obtain precursor body solution; adopt the method of solution spin-coating, take the precursor solution and spin-coat on the PEDOT:PSS layer to form a film, the rotation speed is 5000 rpm, the rotation time is 30 seconds, and annealed at 100 ° C for 10 minutes to obtain a bismuth with a vertical alignment structure. Dimensional o...

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Abstract

The invention discloses a two-dimensional organic-inorganic hybrid perovskite film material with a vertical orientation structure, which is characterized in that the preparation process is as follows: firstly formamidine hydroiodide, organic amine hydroiodide, lead iodide, crystal The growth regulator is mixed and dissolved in an organic solvent to obtain a precursor solution; then the precursor solution is spin-coated to form a film and annealed. The present invention adopts the method of introducing large-volume organic amine and crystal growth regulator into the three-dimensional organic-inorganic hybrid perovskite material, and through the design of the chemical structure of the active layer material and the regulation of the crystal structure, on the one hand, the crystal film has a vertical The characteristics of substrate orientation growth are obtained to obtain good carrier transport ability, and on the other hand, the stability of the material in a humid environment is improved. It is of great significance to realize high stability and high efficiency optoelectronic devices that can be processed by large area solution.

Description

technical field [0001] The invention relates to a two-dimensional organic-inorganic hybrid perovskite film material with a vertical alignment structure. [0002] technical background [0003] In recent years, three-dimensional organic-inorganic hybrid perovskite materials have developed rapidly, and they have the advantages of high optical absorption coefficient, high carrier mobility, and simple solution preparation methods, making this material widely used in the field of solar cells. The highest efficiency of solar cells made of three-dimensional organic-inorganic hybrid perovskite materials has exceeded 20%. However, the poor stability of three-dimensional organic-inorganic perovskite materials in wet environments limits the practical application of this material. [0004] Compared with three-dimensional perovskite materials, two-dimensional perovskite materials have better wet stability. Two-dimensional organic-inorganic hybrid perovskite materials are a type of perovs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/46H01L51/48
CPCH10K71/12H10K71/40H10K85/30Y02E10/549
Inventor 陈红征鄢杰林付伟飞吴刚
Owner ZHEJIANG UNIV
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