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Non-metal organic perovskite low-voltage radiation detector and preparation method thereof

A radiation detector and non-metal technology, applied in the field of radiation detection, can solve the problems of low sensitivity, energy waste, low x-ray attenuation coefficient, etc., and achieve the effects of simple preparation process, increased growth period, and large solution concentration

Active Publication Date: 2020-06-05
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The working principle of this material is the use of conjugated large π bonds for the transport of electrons, based on conjugated organics due to their low x-ray attenuation coefficient, a short charge diffusion length and low long-range π-conjugation stacking between different molecules The nature of X-ray detection is not high, that is, low sensitivity and extremely high operating voltage drive. In the long run, this extremely high operating voltage causes energy waste and environmental pollution again, and the growth of organic material single crystals And preparation has always been a problem, so it has not been able to be used in the field of radiation detection

Method used

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  • Non-metal organic perovskite low-voltage radiation detector and preparation method thereof
  • Non-metal organic perovskite low-voltage radiation detector and preparation method thereof
  • Non-metal organic perovskite low-voltage radiation detector and preparation method thereof

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Effect test

Embodiment 1

[0062] 1. Weigh 11.2g DABCO powder, 9.8g NH 4 Br was dissolved in a round-bottomed flask filled with 50 mL of deionized water, and 50 mL of HBr was added dropwise with a partial pressure low liquid funnel. After the reaction was completed, it was stirred with a magnet for one day. After filtering the reacted solution, use a rotary evaporator to control the temperature at 55-60°C for rotary evaporation. When the powder is precipitated and there is no water, wash it with ethanol three times, and put it into a vacuum oven for drying at 60°C after suction filtration.

[0063] 2. Weigh 13.5g DABCONH 4 Br 3 The powder was dissolved in 30mL of deionized water, and after adding magnets into the beaker, it was heated to 60°C on a hot stage, and the concentration reached 0.45g / mL at this time.

[0064] 3. Package the prepared single crystal growth solution with plastic wrap, put it in a 60°C oven, and continuously cool down to 30°C for 1 day to obtain DABCONH with a size of (>5*5*2mm)...

Embodiment 2

[0069] 1. Weigh 11.2g DABCO powder, 9.8g NH 4 Br was dissolved in a round-bottomed flask filled with 50 mL of deionized water, and 50 mL of HBr was added dropwise with a partial pressure low liquid funnel. After the reaction was completed, it was stirred with a magnet for one day. After filtering the reaction solution, use a rotary evaporator to control the temperature at 55-60°C to rotate and evaporate. When the powder precipitates and no water exists, wash it with ether three times, and put it into a vacuum oven for drying at 60°C after suction filtration.

[0070] 2. Weigh 13.2g DABCONH 4 Br 3 The powder was dissolved in 30mL of deionized water, and after adding magnets into the beaker, it was heated to 55°C on a hot stage. At this time, the concentration reached 0.44g / mL.

[0071] 3. Package the prepared single crystal growth solution with plastic wrap, put it in an oven at 60°C, and continuously cool down to 28°C for 3 days to obtain DABCONH with a size of (>5*5*2mm) 4...

Embodiment 3

[0076] 1. Weigh 11.2g DABCO powder, 9.8g NH 4 Br was dissolved in a round-bottomed flask filled with 50 mL of deionized water, and 50 mL of HBr was added dropwise with a partial pressure low liquid funnel. After the reaction was completed, it was stirred with a magnet for one day. After filtering the reacted solution, use a rotary evaporator to control the temperature at 55-60°C for rotary evaporation. When the powder is precipitated and there is no water, wash it with acetone three times, and put it into a vacuum oven for drying at 60°C after suction filtration.

[0077] 2. Weigh 12.9g DABCONH 4 Br 3The powder was dissolved in 30mL deionized water, and after adding magnets into the beaker, it was heated to 50°C on a hot stage, and the concentration reached 0.43g / mL at this time.

[0078] 3. Package the prepared single crystal growth solution with plastic wrap, put it in an oven at 50°C, and continuously cool it down to 30°C for 3 days to obtain DABCONH with a size of (>5*5*...

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Abstract

The invention relates to a non-metal organic perovskite low-voltage radiation detector and a preparation method thereof, and the preparation method comprises the following steps: 1, culturing a large-size non-metal organic perovskite single crystal with the size not smaller than 5*5*2 mm, wherein the non-metal organic perovskite single crystal is of an ABX3 structure, A is a non-metal monomer triethylene diamine DABCO, B is NH4<+>, and X is Cl, Br or I; 2, carrying out cleaning and single-face polishing on the large-size non-metal organic perovskite single crystal; and 3, depositing an interdigital electrode on the polished surface to obtain the non-metal organic perovskite single crystal radiation device. The working principle and structure of the radiation detector are similar to those of metal-based perovskite, but the material of the radiation detector is an organic material, so that the material combines the advantages of the organic material and the metal-based perovskite, the material is not an organic material of a conjugated system any more, single crystal growth is relatively simple compared with organic growth, and all solvents are water and are non-toxic and harmless.

Description

technical field [0001] The invention relates to the field of radiation detection, in particular to a non-metal organic perovskite low-voltage radiation detector and a preparation method thereof. Background technique [0002] Today's X-rays are used in medicine, test characterization, security inspection, industrial flaw detection, etc., and are closely related to people's lives. Because of such a common use of X-rays and their strong radiation and energy, people began to think about their hazards. Relevant experts believe that X-rays will cause mild harm to the human body when they pass through the human body, causing ionization of human biological macromolecules and water molecules. Excessive X-ray irradiation will affect the physiological functions of the human body, cause chromosomal abnormalities, and cause direct damage to the reproductive, nervous and immune systems of the human body. It is the main cause of cardiovascular disease, diabetes, and cancer. Miscarriage, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46H01L51/48C30B7/08C30B29/54
CPCC30B29/54C30B7/08H10K71/20H10K85/60H10K30/10H10K30/81Y02E10/549
Inventor 赵奎宋鑫崔清玥樊园园李昊瑾刘生忠
Owner SHAANXI NORMAL UNIV
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