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Double perovskite particle detector and preparation method thereof

A double perovskite and detector technology, applied in the field of ionizing radiation detection, can solve the problems of lead-containing perovskite crystal environment and human hazards, and achieve the goal of avoiding deep energy level defects, improving crystal quality, and not easy to decompose and deteriorate Effect

Inactive Publication Date: 2020-03-27
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a particle detector of a double perovskite single crystal and its preparation method to solve the harmful effects of lead-containing perovskite crystals on the environment and human body

Method used

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  • Double perovskite particle detector and preparation method thereof
  • Double perovskite particle detector and preparation method thereof
  • Double perovskite particle detector and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, preparation Cs 2 AgBr 6 Single crystal double perovskite particle detector

[0027] 1) Preparation of Cs 2 AgBr 6 single crystal

[0028] The specific steps are: weigh 0.0851g CsBr, 0.0897g BiBr 3 Mix with 0.0376g AgBr and dissolve in 4.4mL of hydrobromic acid, heat at 150°C for 5h until the solution is clear and completely dissolved. The solution was cooled and crystallized three times. In the first stage, the temperature was lowered to 100°C at a rate of 2.5°C / h, and in the second stage, the temperature was lowered to 70°C at a rate of 1°C / h, followed by continuous heating at 70°C for 4 hours. The three stages are rapidly lowered to room temperature at a rate of 5 °C / h until Cs with a size of about 3 mm is generated 2 AgBr 6 single crystal.

[0029] 2) Cs 2 AgBr 6 Fabrication of Single Crystal Devices

[0030] The surface of the grown double perovskite single crystal was cleaned with isopropanol, and then the double perovskite single crystal w...

Embodiment 2

[0031] Embodiment 2, prepare MA 2 AgBr 6 Single crystal double perovskite particle detector

[0032] 1) Preparation of MA 2 AgBr 6 single crystal

[0033] The specific steps are: weigh 0.0448g MABr, 0.0897g BiBr 3 Mix and dissolve 0.0376g AgBr in 4mL of hydrobromic acid, heat at 150°C for 5h until the solution is clear and completely dissolved. The solution was cooled and crystallized three times. In the first stage, the temperature was lowered to 100°C at a rate of 2.5°C / h, and in the second stage, the temperature was lowered to 70°C at a rate of 1°C / h, followed by continuous heating at 70°C for 4 hours. The three-stage rapid cooling down to room temperature at a rate of 5 °C / h until the formation of MA with a size of about 3 mm 2 AgBr 6 single crystal.

[0034] 2)MA 2 AgBr 6 Fabrication of Single Crystal Devices

[0035] The surface of the grown double perovskite single crystal was cleaned with isopropanol, and then the double perovskite single crystal was anneale...

Embodiment 3

[0036] Embodiment 3, preparation Cs 2 KInCl 6 Single crystal double perovskite particle detector

[0037] 1) Preparation of Cs 2 KInCl 6 single crystal

[0038] The specific steps are: weigh 0.0674g CsCl, 0.0443g InCl 3 Mix with 0.0149g KCl and dissolve in 3mL of hydrochloric acid, heat at 150°C for 5h until the solution is clear and completely dissolved. The solution was cooled and crystallized three times. In the first stage, the temperature was lowered to 100°C at a rate of 2.5°C / h, and in the second stage, the temperature was lowered to 70°C at a rate of 1°C / h, and then heated at 70°C for 4 hours. The three stages are rapidly lowered to room temperature at a rate of 5 °C / h until Cs with a size of about 3 mm is generated 2 KInCl 6 single crystal.

[0039] 2) Cs 2 KInCl 6 Fabrication of Single Crystal Devices

[0040] The surface of the grown double perovskite single crystal was cleaned with isopropanol, and then the double perovskite single crystal was annealed at ...

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Abstract

The invention discloses a double perovskite particle detector and a preparation method thereof. The double perovskite particle detector comprises, from top to bottom in sequence, a double perovskite single crystal and a photoelectric amplification device. The double perovskite single crystal is composed of A, B, C and X, the molecular structural formula of the double perovskite single crystal is A2BCX6, wherein A is methylamine (MA) or phenylethylamine (PEA) or cesium (Cs), B is silver (Ag) or potassium (K), C is bismuth (Bi), antimony (Sb) or indium (In), and X is halogen element chlorine (Cl), bromine (Br) or iodine (I). The double perovskite single crystal material is selected from any one of Cs2AgBiBr6, MA2AgBiBr6, Cs2KInCl6 and MA2AgSbI6. The double perovskite material can effectivelyavoid harm of heavy metal lead to human bodies and the environment, has excellent photoelectric properties, can effectively avoid formation of deep energy level defects, improves the crystal quality,and greatly improves the optical properties; compared with the traditional perovskite material, the perovskite material has better stability and is not easy to decompose and deteriorate in the air.

Description

technical field [0001] The invention belongs to the technical field of ionizing radiation detection, and in particular relates to a double perovskite particle detector and a preparation method thereof. Background technique [0002] In recent years, organic-inorganic hybrid perovskite materials, especially Pb-based organic-inorganic hybrid perovskite materials, have attracted extensive attention because of their excellent optical properties. Due to the advantages of tunable optical bandgap, higher carrier mobility, higher external quantum efficiency, longer carrier lifetime and carrier diffusion length, this type of material is widely used in solar cells, light-emitting diodes, etc. , Photodetectors and other fields have been widely used. Especially in terms of perovskite solar cells, after nearly 10 years of development, the photoelectric conversion efficiency of the cells has exceeded 23%, showing the huge potential of this type of material for commercial application. Jap...

Claims

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Application Information

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IPC IPC(8): G01T1/00
CPCG01T1/00
Inventor 邓贞宙宋智勇唐江牛广达洪伟毅
Owner NANCHANG UNIV
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