A kind of ultraviolet light detector based on double perovskite single crystal and its preparation method

A double perovskite and ultraviolet light technology, applied in semiconductor devices, electrical components, circuits, etc., can solve the problems of reduced popularity and low toxicity, and achieve the effects of high popularization potential, light toxicity, and good stability

Active Publication Date: 2022-04-12
JINAN UNIVERSITY
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  • Summary
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  • Description
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  • Application Information

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Problems solved by technology

[0005] In order to overcome the inherent instability and biological toxicity of the lead-containing perovskite structure in the prior art and the disadvantages and deficiencies such as the use of relatively rare elements in the double perovskite to reduce the popularity, the primary purpose of the present invention is to provide a method based on double calcium Ultraviolet photodetectors from titanite single crystals with low toxicity

Method used

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  • A kind of ultraviolet light detector based on double perovskite single crystal and its preparation method
  • A kind of ultraviolet light detector based on double perovskite single crystal and its preparation method
  • A kind of ultraviolet light detector based on double perovskite single crystal and its preparation method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1 preparation (Ag-EN 2 ) 2 NaAlCl 6 Double perovskite single crystal UV light detector

[0051] (1) Configuration (Ag-EN 2 ) 2 NaAlCl 6 Precursor solution

[0052] Weigh 0.0688g AgCl, 0.0895g NH with high-precision electronic balance 2 CH 2 CH 2 NH 2 , 0.1326gAlCl 3 and 0.0156g NaCl, then mix it with 2mL of hydrochloric acid to get (Ag-EN 2 ) 2 NaAlCl 6 Precursor;

[0053] (2) Preparation (Ag-EN 2 ) 2 NaAlCl 6 double perovskite single crystal

[0054] The (Ag-EN) prepared in step (1) 2 ) 2 NaAlCl 6 The precursor solution was placed on a heating platform and heated at 140 °C for 5 h until the solution was clear and the solute was completely dissolved; then the temperature was lowered to 110 °C at a rate of 1.2 °C / h, and then slowly cooled to 90 °C at a rate of 0.5 °C / h, and then heated at a rate of 1 Slowly cool down to 60°C at a rate of °C / h, then continue heating at 60°C for 5 hours for crystal growth to improve crystal quality, and fina...

Embodiment 2

[0061] Embodiment 2 prepares (Ag-EN 2 ) 2 NaGaCl 6 Double perovskite single crystal UV light detector

[0062] (1) Configuration (Ag-EN 2 ) 2 NaGaCl 6 Precursor solution

[0063] Weigh 0.0688g AgCl, 0.0895g NH with high-precision electronic balance 2 CH 2 CH 2 NH 2 , 0.1369g gallium acetylacetonate and 0.0156g NaCl, then they were mixed with 2mL of hydrochloric acid to obtain (Ag-EN 2 ) 2 NaGaCl 6 Precursor;

[0064] (2) Preparation (Ag-EN 2 ) 2 NaGaCl 6 double perovskite single crystal

[0065] The (Ag-EN) prepared in step (1) 2 ) 2 NaGaCl 6 The precursor solution was placed on a heating platform and heated at 140 °C for 5 h until the solution was clear and the solute was completely dissolved; then the temperature was lowered to 110 °C at a rate of 1.2 °C / h, and then slowly cooled to 90 °C at a rate of 0.5 °C / h, and then heated at a rate of 1 Slowly cool down to 60°C at a rate of °C / h, then continue heating at 60°C for 5 hours for crystal growth to improve...

Embodiment 3

[0072] Embodiment 3 preparation (Ag-EN 2 ) 2 NaCrCl 6 Double perovskite single crystal UV light detector

[0073](1) Configuration (Ag-EN 2 ) 2 NaCrCl 6 Precursor solution

[0074] Weigh 0.0688g AgCl, 0.0895g NH with high-precision electronic balance 2 CH 2 CH 2 NH 2 , 0.1347g chromium acetylacetonate and 0.0156g NaCl, which are then mixed with 2mL of hydrochloric acid to obtain (Ag-EN 2 ) 2 NaCrCl 6 Precursor;

[0075] (2) Preparation (Ag-EN 2 ) 2 NaCrCl 6 double perovskite single crystal

[0076] The (Ag-EN) prepared in step (1) 2 ) 2 NaCrCl 6 The precursor solution was placed on a heating platform and heated at 140 °C for 5 h until the solution was clear and the solute was completely dissolved; then the temperature was lowered to 110 °C at a rate of 1.2 °C / h, and then slowly cooled to 90 °C at a rate of 0.5 °C / h, and then heated at a rate of 1 Slowly cool down to 60°C at a rate of °C / h, then continue heating at 60°C for 5 hours for crystal growth to impr...

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Abstract

The invention belongs to the technical field of semiconductor photoelectric detection, and in particular relates to an ultraviolet light detector based on a double perovskite single crystal and a preparation method. The ultraviolet light detector based on double perovskite single crystal includes substrate, double perovskite single crystal, electrode and conductive gold wire. Double perovskite single crystal is a double Ca Titanite single crystal, where, A=Ag‑EN 2 , BI=Na, BII=Cr, Ga or Al, X=Cl. The present invention uses A 2 BIBIIX 6 The double perovskite material of the structure replaces the traditional perovskite material to make a double perovskite single crystal ultraviolet light detector, which solves the problem caused by the biological toxicity of lead in the traditional perovskite, and has higher and faster ultraviolet light detectors. responsiveness and better stability.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photoelectric detection, and in particular relates to an ultraviolet light detector based on a double perovskite single crystal and a preparation method. Background technique [0002] Perovskite materials have received worldwide scientific research attention due to their excellent optoelectronic properties such as high external quantum efficiency, wide absorption spectrum, tunable optical bandgap, low defect density, low charge carrier loading rate, large charge carrier diffusion length and lifetime. Many researchers have applied it to devices such as solar cells, light-emitting diodes, and lasers. [0003] The current research on perovskite solar cells and optical detectors is based on organic-inorganic hybrid lead-based perovskites of MAPbX3 (X is halogen). Although this type of perovskite has many advantages, the organic A-site ions in the perovskite material are prone to migration and d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/101H01L31/0264H01L31/032H01L31/0256
CPCH01L31/101H01L31/0264H01L31/032H01L31/0256
Inventor 范建东包云开李闻哲袁雅暄张阳奕孟啸
Owner JINAN UNIVERSITY
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