Electrode preparation method, electrode and detector
Through the electrode preparation method based on perovskite materials and lead bromide materials, the problem of poor performance of existing electrodes is solved, and high-performance carbon electrodes and pixelated electrodes are prepared, achieving detection effects with high energy resolution and high detection efficiency.
Patent Information
- Application Number
- CN202510187808.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2025-05-30
AI Technical Summary
When existing semiconductor electrodes detect and locate weak X-ray and gamma-ray isotopes, the electrode performance is poor, making it difficult to meet the needs of high energy resolution and high detection efficiency.
The raw material solution is prepared by perovskite material and lead bromide material, and a perovskite single crystal is obtained through crystal growth, and the surface is coated with carbon slurry and evaporated to prepare high-performance carbon electrodes and pixelated electrodes.
The carbon electrode and pixelated electrode prepared by this method significantly improve the electrode performance, and have the characteristics of low dark current, high ray response, high sensitivity, low detection limit and high energy spectral resolution, and are suitable for X-ray detection and energy spectral resolution.
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Abstract
Description
Technical Field
[0001] The present application relates to the technical field of material preparation, and particularly relates to an electrode preparation method, an electrode, and a detector. Background Art
[0002] Currently, in the fields of nuclear safety, industrial inspection, and medical imaging, high-energy-resolution semiconductors with high detection efficiency are particularly important for detecting and locating weak X-ray and gamma-ray isotopes. However, there are technical problems such as poor electrode performance in existing semiconductors. Summary of the Invention
[0003] Embodiments of the present application provide an electrode preparation method, an electrode, and a detector, which are used to solve technical problems such as poor electrode performance in the prior art.
[0004] In a first aspect of embodiments of the present application, an electrode preparation method is provided, including:
[0005] Based on a perovskite material and a lead bromide material, a raw material solution is prepared;
[0006] The raw material solution is subjected to crystal growth treatment to obtain a perovskite single crystal;
[0007] The surface of the perovskite single crystal is coated with carbon paste to obtain a carbon electrode;
[0008] The perovskite single crystal is subjected to evaporation coating treatment to obtain a pixelated electrode.
[0009] In the electrode preparation method of this embodiment, based on a perovskite material and a lead bromide material, a carbon electrode and a pixelated electrode are prepared, improving the electrode performance of the carbon electrode and the pixelated electrode.
[0010] In a second aspect of embodiments of the present application, an electrode is provided, including a carbon electrode and a pixelated electrode prepared by the electrode preparation method in any of the above embodiments. Therefore, this electrode has all the beneficial effects of the electrode preparation method in any of the above embodiments, which will not be elaborated here.
[0011] In a third aspect of embodiments of the present application, a detector is proposed, including an electrode in any of the above embodiments. Therefore, this detector has all the beneficial effects of the electrode in any of the above embodiments, which will not be elaborated here. Description of the Drawings
[0012] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0013] Figure 1 It is a flowchart of the electrode preparation method provided by the embodiment of the present application;
[0014] Figure 2 It is one of the schematic diagrams of the electrode preparation method provided by the embodiment of the present application;
[0015] Figure 3 It is the second schematic diagram of the electrode preparation method provided by the embodiment of the present application. Detailed implementation manners
[0016] To better understand the technical solutions provided by the embodiments of this specification, the following will make a detailed description of the technical solutions of the embodiments of this specification through the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of this specification and the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. Without conflict, the technical features in the embodiments of this specification and the embodiments can be combined with each other.
[0017] In this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element. The term "more than two" includes two or more than two cases.
[0018] In some embodiments, as Figure 1 shown, an electrode preparation method is provided in the embodiments of the present application, including:
[0019] Step S101, preparing a raw material solution based on a perovskite material and a lead bromide material;
[0020] Step S102, performing crystal growth treatment on the raw material solution to obtain a perovskite single crystal;
[0021] Step S103: Apply a carbon paste on the surface of the perovskite single crystal to obtain a carbon electrode;
[0022] Step S104: Perform evaporation coating on the perovskite single crystal to obtain a pixelated electrode.
[0023] In this embodiment, an electrode preparation method is proposed. Based on perovskite materials and lead bromide materials, a raw material solution is prepared, where the raw material solution is a solution containing electrode raw materials.
[0024] Exemplarily, the perovskite material can be high-purity FAPb.
[0025] Exemplarily, the lead bromide material can be high-purity PbBr2.
[0026] Perform crystal growth treatment on the raw material solution to obtain a perovskite single crystal.
[0027] Apply a carbon paste on the surface of the perovskite single crystal to obtain a carbon electrode.
[0028] Perform evaporation coating on the perovskite single crystal to obtain a pixelated electrode.
[0029] It should be noted that the single crystal detector prepared by the carbon electrode and the pixelated electrode regulates the distribution of the weighted potential inside the single crystal detector, making the detector have characteristics such as low dark current, high ray response, high sensitivity, low detection limit, and high energy spectrum resolution, and has a wide range of applications in the fields of X-ray detection, energy spectrum resolution, etc. Compared with the existing planar electrode and hemispherical electrode, the carbon electrode and the pixelated electrode in this embodiment balance the electron-hole transport characteristics and have higher energy resolution.
[0030] The electrode preparation method in this embodiment is based on perovskite materials and lead bromide materials to prepare a carbon electrode and a pixelated electrode, improving the electrode performance of the carbon electrode and the pixelated electrode.
[0031] In some embodiments, such as the embodiment of the present application, an electrode preparation method is provided. Based on perovskite materials and lead bromide materials, a raw material solution is prepared, including:
[0032] Step S201: Dissolve the perovskite material and the lead bromide material in a solvent to obtain a precursor solution;
[0033] Step S202: Obtain a preset auxiliary solvent;
[0034] Step S203: Add the auxiliary solvent to the precursor solution to obtain a raw material solution.
[0035] In this embodiment, the perovskite material and the lead bromide material are dissolved in a solvent to obtain a precursor solution.
[0036] Exemplarily, high-purity FAPb and high-purity PbBr2 are completely dissolved in DMF and GBL solvents to obtain a 1.4M precursor solution.
[0037] Obtain a preset auxiliary solvent.
[0038] Exemplarily, the auxiliary solvent may include components such as hexafluorobenzene and poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine].
[0039] Add the auxiliary solvent to the precursor solution to obtain a raw material solution.
[0040] Exemplarily, the raw material solution is stirred evenly at room temperature before use.
[0041] In some embodiments, such as the embodiments provided in the present application, a method for preparing an electrode is provided, and the molar ratio of the perovskite material to the lead bromide material is 1:1.
[0042] Exemplarily, high-purity FAPb and high-purity PbBr2 are weighed in a molar ratio of 1:1.
[0043] In some embodiments, such as the embodiments provided in the present application, a method for preparing an electrode is provided. Dissolving the perovskite material and the lead bromide material in a solvent to obtain a precursor solution includes:
[0044] Step S301, obtain a preset organic solvent;
[0045] Step S302, dissolve the perovskite material and the lead bromide material in the organic solvent to obtain a precursor solution.
[0046] In this embodiment, obtain a preset organic solvent.
[0047] Exemplarily, the organic solvent may be DMF and GBL solvents.
[0048] Dissolve the perovskite material and the lead bromide material in the organic solvent to obtain a precursor solution.
[0049] Exemplarily, dissolve the perovskite material and the lead bromide material completely in DMF and GBL solvents to obtain a precursor solution.
[0050] In some embodiments, such as the embodiments provided in the present application, a method for preparing an electrode is provided. Performing crystal growth treatment on the raw material solution to obtain perovskite single crystals includes:
[0051] Step S401, place the raw material solution in an oven;
[0052] Step S402: Perform crystal growth treatment on the raw material solution in the oven to obtain perovskite single crystals.
[0053] In this embodiment, the raw material solution is placed in the oven, and crystal growth treatment is performed on the raw material solution in the oven to obtain perovskite single crystals.
[0054] Exemplarily, the raw material solution is placed in the oven for crystal growth to obtain transparent FAPbBr3 perovskite single crystals.
[0055] In some embodiments, as provided in the embodiments of the present application, there is an electrode preparation method. After performing crystal growth treatment on the raw material solution to obtain perovskite single crystals, the method further includes:
[0056] Step S501: Grind and polish the surface of the perovskite single crystal to obtain a polished perovskite single crystal.
[0057] In this embodiment, the surface of the perovskite single crystal is respectively ground and polished to obtain a polished perovskite single crystal.
[0058] Exemplarily, abrasive papers with different mesh numbers are used to grind the surface of the single crystal to obtain a flat single crystal surface, and a combination of polishing paper and polishing liquid is used to polish the surface of the single crystal to obtain a nanoscale flat single crystal surface.
[0059] In some embodiments, as provided in the embodiments of the present application, there is an electrode preparation method. Applying a carbon paste to the surface of the perovskite single crystal to obtain a carbon electrode includes:
[0060] Step S601: Uniformly apply carbon paste on the surface of the perovskite single crystal;
[0061] Step S602: Place the perovskite single crystal coated with carbon paste on a hot stage for annealing and drying to obtain a carbon electrode.
[0062] In this embodiment, carbon paste is uniformly applied on the surface of the perovskite single crystal, and the perovskite single crystal coated with carbon paste is placed on a hot stage for annealing and drying to obtain a carbon electrode.
[0063] Exemplarily, after uniformly applying a layer of carbon paste on the surface of the perovskite single crystal with a nanoscale flat surface through a scraper, it is placed on a hot stage at 80 °C for annealing and drying for 20 minutes until the carbon paste is completely dry.
[0064] In some embodiments, as provided in the embodiments of the present application, there is an electrode preparation method. Performing evaporation coating on the perovskite single crystal to obtain a pixelated electrode includes:
[0065] Step S701: Obtain a preset mask plate;
[0066] Step S702: Fix the perovskite single crystal on the mask plate;
[0067] Step S703: Place the fixed perovskite single crystal in the evaporation equipment;
[0068] Step S704: Through the evaporation equipment, perform evaporation treatment on the perovskite single crystal to obtain a pixelated electrode.
[0069] In this embodiment, obtain a preset mask plate and fix the perovskite single crystal on the mask plate.
[0070] Place the fixed perovskite single crystal in the evaporation equipment, and perform evaporation treatment on the perovskite single crystal through the evaporation equipment to obtain a pixelated electrode.
[0071] Exemplarily, a specially designed mask plate is fixed on the other surface of the single crystal, and a pixelated array electrode is evaporated on the surface of the single crystal by using a thermal evaporation equipment.
[0072] Exemplarily, the weight potential distribution under different device structures is as Figure 2 shown.
[0073] Exemplarily, the performance comparison under different device structures is as Figure 3 shown.
[0074] In some embodiments, the embodiments of the present application provide an electrode, including a carbon electrode and a pixelated electrode prepared by the electrode preparation method in any of the above embodiments. Therefore, this electrode has all the beneficial effects of the electrode preparation method in any of the above embodiments, which will not be elaborated here.
[0075] In some embodiments, the embodiments of the present application provide a detector, including the electrode in any of the above embodiments. Therefore, this electrode has all the beneficial effects of the electrode in any of the above embodiments, which will not be elaborated here.
[0076] It should be noted that in the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0077] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the present application.
[0078] Although the preferred embodiments of the present specification have been described, additional changes and modifications can be made to these embodiments by those skilled in the art once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present specification.
[0079] Obviously, those skilled in the art can make various changes and modifications to the present specification without departing from the spirit and scope of the present specification. Thus, if these modifications and variations of the present specification fall within the scope of the claims of the present specification and their equivalent technologies, the present specification is also intended to include these modifications and variations.
Claims
1. A method for preparing an electrode, characterized in that: The method comprises: Based on the perovskite material and the lead bromide material, a raw material solution is prepared; Performing a crystal growth process on the raw material solution to obtain a perovskite single crystal; Applying carbon slurry to the surface of the perovskite single crystal to obtain a carbon electrode; The perovskite single crystal is subjected to an evaporation treatment to obtain a pixelated electrode.
2. The method according to claim 1, characterized in that: The method of preparing a raw material solution based on a perovskite material and a lead bromide material comprises: Dissolving the perovskite material and the lead bromide material in a solvent to obtain a precursor solution; Obtaining a preset auxiliary solvent; The auxiliary solvent is added to the precursor solution to obtain the raw material solution.
3. The method according to claim 2, characterized in that The molar ratio of the perovskite material to the lead bromide material is 1:
1.
4. The method according to claim 2, characterized in that: The step of dissolving the perovskite material and the lead bromide material in a solvent to obtain a precursor solution comprises: Obtaining a preset organic solvent; The perovskite material and the lead bromide material are dissolved in the organic solvent to obtain a precursor solution.
5. The method according to claim 1, characterized in that: The step of subjecting the raw material solution to a crystal growth process to obtain a perovskite single crystal comprises: placing the raw material solution in an oven; The raw material solution in the oven is subjected to a crystal growth process to obtain the perovskite single crystal.
6. The method according to claim 1, characterized in that After the raw material solution is subjected to a crystal growth process to obtain a perovskite single crystal, the method further comprises: The surface of the perovskite single crystal is ground and polished to obtain the polished perovskite single crystal.
7. The method according to any one of claims 1 to 6, characterized in that The step of applying carbon slurry to the surface of the perovskite single crystal to obtain a carbon electrode comprises: Evenly apply carbon slurry on the surface of the perovskite single crystal; The perovskite single crystal coated with carbon slurry is placed on a hot stage for annealing and drying to obtain the carbon electrode.
8. The method according to any one of claims 1 to 6, characterized in that The step of performing an evaporation process on the perovskite single crystal to obtain a pixelated electrode comprises: Get the preset mask; Fixing the perovskite single crystal on the mask; placing the fixed perovskite single crystal in an evaporation device; The perovskite single crystal is subjected to an evaporation treatment by the evaporation equipment to obtain the pixelated electrode.
9. An electrode, characterized in that: The electrode comprises a carbon electrode prepared by the electrode preparation method according to any one of claims 1 to 8 and a pixelated electrode.
10. A detector, characterized in that: The detector comprises the electrode as claimed in claim 9.