Organic-inorganic perovskite scintillator used for nuclear radiation detection and preparation method thereof

An inorganic calcium and scintillator technology, used in radiation measurement, X/γ/cosmic radiation measurement, chemical instruments and methods, etc., can solve the problems of fast response time and large light yield, and achieve low cost, large light Yield, controllable effect

Active Publication Date: 2019-03-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the commonly used scintillator materials include NaI, CsI, BGO, plastic and other materials, but

Method used

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  • Organic-inorganic perovskite scintillator used for nuclear radiation detection and preparation method thereof
  • Organic-inorganic perovskite scintillator used for nuclear radiation detection and preparation method thereof
  • Organic-inorganic perovskite scintillator used for nuclear radiation detection and preparation method thereof

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Embodiment 1

[0023] A CH for nuclear radiation detection 3 NH 3 PbCl 2.7 I 0.3 The preparation method of organic-inorganic perovskite scintillator comprises the steps:

[0024] 1) Mix the hydrochloric acid solution and the methylamino alcohol solution with a molar ratio of 1.2mol:1mol in a round-bottomed flask under an ice-water bath at 0°C for 3 hours, so that CH can be fully reacted 3 NH 3 Cl mixed solution; the molar ratio of 1.2mol: 1mol hydroiodic acid solution and methylamino alcohol solution were mixed and stirred for 3h in a round-bottomed flask under an ice-water bath, so that the reaction was sufficient to generate CH 3 NH 3 1 mixed solution;

[0025] 2) Clean the rotary evaporator with ethanol solution first, then remove the rotary evaporator bottle filled with ethanol solution and replace it with CH 3 NH 3 The Cl mixed solution was subjected to rotary evaporation at 60 °C until dry white CH 3 NH 3 Cl powder, then poured into ethanol and ether successively to obtain CH...

Embodiment 2

[0030] A CH for nuclear radiation detection 3 NH 3 PbCl 2.85 I 0.15 The preparation method of organic-inorganic perovskite scintillator comprises the steps:

[0031]1) Mix the hydrochloric acid solution and the methylamino alcohol solution with a molar ratio of 1.2mol:1mol in a round-bottomed flask under an ice-water bath at 0°C for 3 hours, so that CH can be fully reacted 3 NH 3 Cl mixed solution; the molar ratio of 1.2mol: 1mol hydroiodic acid solution and methylamino alcohol solution were mixed and stirred for 3h in a round-bottomed flask under an ice-water bath, so that the reaction was sufficient to generate CH 3 NH 3 1 mixed solution;

[0032] 2) Change CH 3 NH 3 The Cl mixed solution was subjected to rotary evaporation at 60 °C until dry white CH 3 NH 3 Cl powder, then poured into ethanol and ether successively to obtain CH 3 NH 3 Cl powder was washed and purified twice, dried and placed in a vacuum oven at 60°C for 24 hours; then CH 3 NH 3 The mixed solut...

Embodiment 3

[0037] A CH for nuclear radiation detection 3 NH 3 PbCl 1.5 I 1.5 The preparation method of organic-inorganic perovskite scintillator comprises the steps:

[0038] 1) Mix the hydrochloric acid solution and the methylamino alcohol solution with a molar ratio of 1.2mol:1mol in a round-bottomed flask under an ice-water bath at 0°C for 3 hours, so that CH can be fully reacted 3 NH 3 Cl mixed solution; the molar ratio of 1.2mol: 1mol hydroiodic acid solution and methylamino alcohol solution were mixed and stirred for 3h in a round-bottomed flask under an ice-water bath, so that the reaction was sufficient to generate CH 3 NH 3 1 mixed solution;

[0039] 2) Change CH 3 NH 3 The Cl mixed solution was subjected to rotary evaporation at 60 °C until dry white CH 3 NH 3 Cl powder, then poured into ethanol and ether successively to obtain CH 3 NH 3 Cl powder was washed and purified twice, dried and placed in a vacuum oven at 60°C for 24 hours; then CH 3 NH 3 The mixed soluti...

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Abstract

The invention discloses an organic-inorganic perovskite scintillator used for nuclear radiation detection and a preparation method thereof. The method comprises the following steps: performing an ice-water bath mixed reaction on methylamine ethanol solution and haloid acid to obtain methyl amine halide solution, performing rotary evaporation on the methyl amine halide solution, then purifying themethyl amine halide solution and putting the purified methyl amine halide solution into a 60-DEG C vacuum drying oven for drying, so as to obtain methyl amine halide powder; adding the prepared methylamine halide powder and lead halide powder into mixed solution of DMSO (dimethylsulfoxide) and N,N-DMF (dimethylformamide), performing a sufficient reaction and filtering obtained solution; preparinga large-sized organic-inorganic hydrid perovskite monocrystal in 65-120-DEG C solution with a temperature inversion crystallization method in supersaturated solution. The preparation method can be used for preparing the large-sized I-doped perovskite crystal required by detection of radiation fields (alpha particles, beta particles, X particles, neutrons and the like); a nuclear radiation detector comprising the prepared I-doped perovskite scintillator has the characteristics of being high in response speed, high in photoyield, high in spatial resolution and high in energy resolution.

Description

technical field [0001] The invention relates to a scintillator and a preparation method thereof, in particular to an organic-inorganic perovskite scintillator for nuclear radiation detection and a preparation method thereof. Background technique [0002] Commonly used scintillator materials can be divided into organic scintillator materials and inorganic scintillator materials according to their material properties. Generally, organic scintillator materials have the characteristics of fast response and decay time, cheap price but low density, and low light yield; while organic scintillator materials have the characteristics of large light gap, slow response time, and high manufacturing cost. With the development of photoelectric detection technology, scintillator nuclear radiation detector has become the most mature and widely used ionizing radiation detector. Among them, in the application field of PET (Positron Emission Computed Tomography, positron emission computed tomo...

Claims

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Application Information

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IPC IPC(8): C09K11/66C09K11/06C30B29/54C30B7/14G01T1/202
CPCC09K11/06C09K11/665C30B7/14C30B29/54G01T1/2023
Inventor 徐强邵文奕欧阳晓平
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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