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DJ type two-dimensional double-layer hybrid perovskite material, preparation method thereof and application of perovskite material

A perovskite material and double-layer technology, applied in the field of photoelectric detection, can solve problems such as poor performance and slow response speed, and achieve the effects of high thermodynamic stability, low dark current, and high stability

Active Publication Date: 2020-05-29
SHANXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of slow response and poor performance of perovskite materials in photodetectors, the present invention provides a DJ-type two-dimensional double-layer hybrid perovskite material and its preparation method and application

Method used

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  • DJ type two-dimensional double-layer hybrid perovskite material, preparation method thereof and application of perovskite material
  • DJ type two-dimensional double-layer hybrid perovskite material, preparation method thereof and application of perovskite material
  • DJ type two-dimensional double-layer hybrid perovskite material, preparation method thereof and application of perovskite material

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Experimental program
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Effect test

Embodiment 1

[0029] Step 1, 20mL HI (47%) solution containing lead acetate (0.758g, 2mmol) and methylamine (0.031g, 1mmol) was heated and stirred for 15min, then naturally cooled to room temperature, and evaporated slowly. After 4 days, red flaky crystals were obtained .

[0030] Step 2, under the condition of heating and stirring, dissolve the red flaky crystal obtained in step (1) in HI solution, then add 2-methyl-1,5-pentanediamine (0.116g, 1mmol), heat and stir After the solution became clear, it was naturally cooled to room temperature and evaporated slowly. After 7 days, dark red blocky crystals were obtained. This crystal is the described (2-methyl-1,5-pentanediamine) (methylamine) Pb 2 I 7 Material. The crystal structure was obtained by X-ray single crystal diffractometer analysis, such as figure 1 shown.

Embodiment 2

[0032] (2-Methyl-1,5-pentanediamine)(methylamine)Pb 2 I 7 Thermogravimetric analysis of crystalline materials.

[0033] The thermogravimetric analysis of the crystal material obtained in Example 1 shows that the material has high thermal stability and can be stably used below 272°C.

Embodiment 3

[0035] (2-Methyl-1,5-pentanediamine)(methylamine)Pb 2 I 7 The light-absorbing ability of the crystal material was analyzed, and the ultraviolet-visible absorption spectrum test was carried out on the synthesized organic-inorganic hybrid material. from image 3 We can obtain that the light absorption range of the material reaches 630nm, while the ultraviolet-visible light absorption range is 200-780nm, so the crystal material meets the requirement of being a high absorption semiconductor material.

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Abstract

The invention belongs to the technical field of photoelectric detection, and relates to a DJ type two-dimensional double-layer hybrid perovskite material, a preparation method thereof and applicationof the perovskite material. According to the two-dimensional double-layer DJ type organic-inorganic hybrid perovskite semiconductor material (2-methyl-1, 5-pentanediamine) (methylamine) Pb2I7, lead iodide methylamine three-dimensional perovskite is taken as a basis, long-chain organic amine (2-methyl-1, 5-pentanediamine) ions are introduced, so that the two-dimensional double-layer DJ type organic-inorganic hybrid perovskite material is obtained. The material shows excellent light absorption performance and excellent photoelectric response performance; the stability of the material reaches 272DEG C. Therefore, as a novel semiconductor material, the perovskite material has potential application value in the fields of photoelectric detection and the like.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, and in particular relates to a DJ-type two-dimensional double-layer hybrid perovskite material, a preparation method and an application. Background technique [0002] Organic-inorganic hybrid perovskites are a new class of semiconductor materials with excellent optoelectronic properties due to their direct bandgap, high carrier mobility, large carrier diffusion length, and high light absorption coefficient. In addition, the obvious advantage of organic-inorganic hybrid perovskite lies in the diversity of synthetic components. It is possible to design and synthesize perovskite materials with different properties by selecting different halogens or organic molecules, so that the calcium Morphology control, luminescence regulation and function design of optoelectronic devices of titanite materials. Photoelectric detection is a detection method that converts light into electricity by ...

Claims

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Application Information

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IPC IPC(8): H01L51/46C09K3/00
CPCC09K3/00H10K85/00H10K30/10Y02E10/549
Inventor 符冬营张献明
Owner SHANXI UNIV
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