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All-inorganic perovskite single crystal-based radiation detector and preparation method thereof

A radiation detector and inorganic calcium technology, applied in the field of radiation detection, can solve the problems of limited application range and poor stability, and achieve the effects of extending the use range, stable performance and high collection efficiency

Inactive Publication Date: 2017-06-13
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Application Information

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Problems solved by technology

However, traditional organic-inorganic hybrid perovskite materials have poor environmental stability, which limits their application range.

Method used

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  • All-inorganic perovskite single crystal-based radiation detector and preparation method thereof
  • All-inorganic perovskite single crystal-based radiation detector and preparation method thereof

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Embodiment Construction

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments, and the mode of the present invention includes but not limited to the following embodiments.

[0035] The detector structure is as figure 1 As shown, the detector can be used to detect high-energy particles, such as high-energy rays such as X, γ, and β. All-inorganic perovskite single crystal material ABX in detectors 3 The main role of the electrons is to convert high-energy radiation into electrons and holes. A can be Cs, Cu, Na, K, Ru, etc.; B can be Pb, Sn, Cu, Ge, etc.; X can be Cl, Br, I, BF4, etc. Electrodes are used to collect electrons and holes to generate electrical detection signals. The electrode material can be Au, Ag, Ni and other metal materials or carbon materials, such as graphene, carbon fiber, carbon nanotubes, conductive graphite, etc.

[0036] This embodiment provides a radiation detector based on an all-inorganic perovskite single...

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Abstract

The invention discloses an all-inorganic perovskite single crystal-based radiation detector, which comprises an all-inorganic perovskite single crystal for converting high energy radiation into an electron-hole pair, and two electrodes for collecting the electron-hole pair respectively arranged above two sides of the all-inorganic perovskite single crystal. The invention also provides a method for preparing the radiation detector by a combination of a solution method, a Bridgman method and a vapor deposition method. The preparation process is simple and convenient to operate. The all-inorganic perovskite single crystal in the radiation detector has the advantages of adjustable forbidden bandgap width, high carrier mobility, good bipolar charge transmission characteristics, and exciton diffusion length of more than 1 mu m. The radiation detector has the advantages of simple structure, reasonable design, excellent stability, and broad application prospect.

Description

technical field [0001] The invention relates to the technical field of radiation detection, in particular to a radiation detector based on an all-inorganic perovskite single crystal and a preparation method thereof. Background technique [0002] With the advantages of small size, high spatial resolution and high sensitivity, semiconductor radiation detectors can be used to detect high-energy rays such as x, gamma and beta, and are widely used in security, national defense, medical and nuclear power industries. Similar to the principle of photodetectors, the semiconductor material in the semiconductor radiation detector absorbs the energy of high-energy particles to generate electron-hole pairs. After the voltage is applied to the two poles, the charge carriers drift to the two poles and collect The charge will be induced to form a signal pulse in the external circuit to complete the signal acquisition. The difference is that the penetration depth of high-energy particles is...

Claims

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Application Information

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IPC IPC(8): H01L31/032H01L31/115H01L31/18
CPCH01L31/032H01L31/115H01L31/18
Inventor 杨丽军杨盼赵晓冲王劲川
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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