Temperature fuse mechanism based on two-dimensional ferroelectric perovskite and application

Abstract

The invention relates to the technical field of photonics, in particular to a temperature fuse mechanism based on two-dimensional ferroelectric perovskite and application, and the temperature fuse mechanism comprises a fuse which is made of a ferroelectric perovskite material; the optical detection unit is used for detecting the optical signal change of the fuse and converting an optical signal into an electric signal; the signal processing unit is electrically connected with the optical detection unit and is used for comparing the electric signal with a preset critical value; and the control circuit unit is electrically connected with the signal processing unit and is used for controlling the circuit to be switched between a loop state and an open circuit state. According to the invention, by using the change of nonlinear absorption characteristics caused by the structural change of the ferroelectric perovskite material at different temperatures, the signal is cut off. Moreover, the nonlinear absorption characteristic of the ferroelectric perovskite is reversible, the ferroelectric perovskite is cut off when the preset critical temperature is reached, and then the ferroelectric perovskite can be repeatedly used, so that the cost is greatly reduced, and the utilization rate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photonics, and in particular to a temperature fuse mechanism based on two-dimensional ferroelectric perovskite and its application. Background Art

[0002] With the advent of the digital age, optical communication technology, as a key branch of the information and communications field, has rapidly developed. Driven by emerging technologies such as smartphones, 5G networks, cloud computing, and the Internet of Things, the optical communications industry is experiencing new development opportunities. Optical fuses are key components for optical signal control in optical communication systems, primarily due to their function as overload protection devices. Optical fuses are widely used in various devices within optical communication systems, such as lasers and photodetectors. With the continued advancement of optical communication technology, the application prospects of optical fuses will continue to expand.

[0003] Traditional fuses mostly use a fusing mechanism, disconnecting the system when the temperature reaches the melting point. This technology faces several problems: First, traditional fuses are single-use and non-recoverable. They fail after reaching the melting temperature once, increasing equipment maintenance costs. Traditional fuses have temperature limitations, typically with a specific melting temperature range, which restricts their use in different environments. Traditional fuses are also unreliable. If they are exposed to an environment close to the melting point for a long time or are used for too long, their performance will degrade rapidly, which can easily cause accidents.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a thermal fuse mechanism and application based on two-dimensional ferroelectric perovskite, so as to solve the problem that the existing thermal fuse cannot be reused.

[0006] The technical solutions adopted by the present invention to solve the above technical problems are as follows:

[0007] A first aspect of the present invention provides a two-dimensional ferroelectric perovskite-based thermal fuse mechanism, the two-dimensional ferroelectric perovskite-based thermal fuse mechanism comprising:

[0008] A fuse, wherein the material of the fuse is a ferroelectric perovskite material;

[0009] a light detection unit, for detecting changes in the light signal of the fuse and converting the light signal into an electrical signal;

[0010] a signal processing unit, electrically connected to the light detection unit, and configured to compare the electrical signal with a preset critical value;

[0011] The control circuit unit is electrically connected to the signal processing unit and is used to control the circuit to switch between the loop state and the open circuit state.

[0012] Preferably, the ferroelectric perovskite material is selected from (BA)2PbBr4, (BA)2MAPb2Br7, (BA)2(MA)2Pb3Br 10 One of them.

[0013] Preferably, the thickness of the fuse is 0.5 mm.

[0014] Preferably, the surface of the fuse is also covered with a hexagonal boron nitride film.

[0015] Preferably, the signal processing unit includes an operational amplifier and a voltage comparator, the operational amplifier is used to amplify the electrical signal obtained by the light detection unit, and the voltage comparator is used to compare the amplified electrical signal with a preset critical value.

[0016] Preferably, the light detection unit is a photodetector.

[0017] A second aspect of the present invention provides an application of the above-mentioned two-dimensional ferroelectric perovskite-based temperature fuse mechanism in optoelectronic devices.

[0018] Preferably, the optoelectronic device is a laser, a laser cutting machine or a laser marking machine.

[0019] The third aspect of the present invention provides the use of ferroelectric perovskite materials in a temperature fuse mechanism based on two-dimensional ferroelectric perovskite.

[0020] Beneficial effects:

[0021] This invention discloses a thermal fuse mechanism and its application based on two-dimensional ferroelectric perovskite. This invention utilizes the changes in the nonlinear absorption characteristics of the ferroelectric perovskite material, brought about by structural variations at different temperatures, to cut off optical signals. Furthermore, the nonlinear absorption characteristics of the ferroelectric perovskite are reversible, cutting off the device at a preset critical temperature and allowing for reuse, significantly reducing costs and improving utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the reverse saturation absorption characteristic curve of the ferroelectric perovskite material mentioned in the preferred embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the multiphoton absorption-induced fluorescence detection system mentioned in a preferred embodiment of the present invention;

[0024] Figure 3 is a graph showing the relationship between the two-photon absorption coefficient and temperature of the ferroelectric perovskite mentioned in a preferred embodiment of the present invention;

[0025] Figure 4 This is a schematic structural diagram of a two-dimensional ferroelectric perovskite-based temperature fuse mechanism prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0026] The present invention provides a thermal fuse mechanism and application based on a two-dimensional ferroelectric perovskite. To make the objectives, technical solutions, and effects of the present invention more clear and explicit, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0027] An embodiment of the present invention provides a two-dimensional ferroelectric perovskite-based thermal fuse mechanism, the two-dimensional ferroelectric perovskite-based thermal fuse mechanism comprising:

[0028] A fuse, wherein the material of the fuse is a ferroelectric perovskite material;

[0029] a light detection unit, for detecting changes in the light signal of the fuse and converting the light signal into an electrical signal;

[0030] a signal processing unit, electrically connected to the light detection unit, and configured to compare the electrical signal with a preset critical value;

[0031] The control circuit unit is electrically connected to the signal processing unit and is used to control the circuit to switch between the loop state and the open circuit state.

[0032] The working process of the temperature fuse mechanism based on two-dimensional ferroelectric perovskite provided by an embodiment of the present invention is as follows: when the temperature rises, the two-photon absorption coefficient of the ferroelectric perovskite material will decrease, and the light signal received by the light detection unit will change. The change of this light signal will be converted into a change of the electrical signal. When the electrical signal reaches a preset critical value, the control circuit unit cuts off the circuit and turns off the power supply to prevent damage to the optoelectronic device caused by excessive temperature.

[0033] The working principle of the temperature fuse mechanism based on two-dimensional ferroelectric perovskite provided by the embodiment of the present invention is to cut off the signal by utilizing the change of nonlinear absorption characteristics brought about by the structural change of ferroelectric perovskite material at different temperatures. Specifically, the anti-saturation absorption in the nonlinear absorption characteristic refers to the increase of the two-photon absorption coefficient of the ferroelectric perovskite material when the incident light intensity increases. Figure 1 shown.

[0034] Ferroelectric perovskite materials exhibit ferroelectricity, meaning their spontaneous polarization orientation changes with an applied electric field. This spontaneous polarization primarily stems from the ordered arrangement of organic cations and the relative displacement of the inorganic components. Structurally, at room temperature, all organic cations are in a relatively ordered state, known as the ferroelectric phase. When the temperature rises above the phase transition temperature, the ferroelectric perovskite material transitions from the ferroelectric phase to the paraelectric phase, and the crystal structure becomes symmetrical. Compared to the ferroelectric phase, the paraelectric phase exhibits less distortion in the inorganic octahedron framework, and under high-temperature excitation, the organic cations become dynamically disordered, resulting in zero spontaneous polarization. In the spontaneous polarization state of ferroelectric perovskites, the centers of positive and negative charge do not coincide, generating an electric dipole moment, which is closely related to the nonlinear absorption properties of ferroelectric perovskites.

[0035] The embodiment of the present invention uses the detection technology of multiphoton absorption induced fluorescence to characterize the two-photon absorption characteristics (one of the nonlinear absorption characteristics, that is, the process of absorbing two photons simultaneously in one molecule) of the ferroelectric perovskite material (BA)2PbBr4. Figure 2 In the detection system shown, laser light is emitted from the optoelectronic device and then split into two beams by a beam splitter. One beam is used as a reference beam, and the other beam enters the microscope. The laser light is reflected onto the ferroelectric perovskite sample (BA)2PbBr4, causing the ferroelectric perovskite sample to emit fluorescence. The fluorescence is collected by the microscope and the two-photon absorption coefficient of the ferroelectric perovskite sample at different temperatures is obtained, as shown in Figure 2. Figure 3 The figure shows that the two-photon absorption coefficient begins to drop significantly at 383K, the phase transition temperature of the ferroelectric perovskite sample, and then drops to a certain level at 385K and remains there. Furthermore, the temperature-dependent characteristics of the temperature were recorded during both the heating and cooling processes, demonstrating the reversibility of the temperature dependence. Therefore, the thermal fuse mechanism provided by the present embodiment is reusable. After completing maintenance on the optoelectronic device, the thermal fuse mechanism can be used to monitor its temperature status again, reducing costs and improving convenience.

[0036] In some embodiments, the ferroelectric perovskite material is selected from (BA)2PbBr4,

[0037] (BA)2MAPb2Br7, (BA)2(MA)2Pb3Br 10 One of them.

[0038] Ferroelectric perovskite materials are composed of organic cation layers and inorganic layers. The combination of these two types can alter the nonlinear optical properties of the ferroelectric perovskite material, which in turn affects the performance of the thermal fuse material. For example, when the number of inorganic layers is two, the nonlinear absorption capacity is superior to that of other similar materials, which will improve the performance of the thermal fuse.

[0039] In some embodiments, the thickness of the fuse is 0.5 mm.

[0040] Fuses (ferroelectric perovskite materials) of different thicknesses exhibit different nonlinear absorption capabilities, which is related to the quantum confinement effect and exciton binding force, and will ultimately affect the fuse.

[0041] In some embodiments, the surface of the fuse is further covered with a hexagonal boron nitride film.

[0042] The surface of the ferroelectric perovskite material is covered with a layer of hexagonal boron nitride (h-BN) film to protect it and prevent the performance of the ferroelectric perovskite material from degrading.

[0043] In some embodiments, the signal processing unit includes an operational amplifier and a voltage comparator, wherein the operational amplifier is used to amplify the electrical signal obtained by the light detection unit, and the voltage comparator is used to compare the amplified electrical signal with a preset critical value.

[0044] In some embodiments, the light detection unit is a photodetector.

[0045] The embodiment of the present invention provides the application of the above-mentioned two-dimensional ferroelectric perovskite-based temperature fuse mechanism in optoelectronic devices.

[0046] In some embodiments, the optoelectronic device is a laser, a laser cutting machine, or a laser marking machine.

[0047] The embodiments of the present invention provide an application of a ferroelectric perovskite material in a temperature fuse mechanism based on two-dimensional ferroelectric perovskite.

[0048] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them, and are intended only to illustrate the present invention and in no way limit the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0049] Preparation Example 1

[0050] Preparation of the fuse (ferroelectric perovskite layer): Silicon wafers are used as substrates, which have good thermal stability and mechanical strength. Ferroelectric perovskite materials are easily affected by water and oxygen in the air. Therefore, the bulk ferroelectric perovskite material (BA)2PbBr4 is placed on the substrate, and then a prepared thin layer of hexagonal boron nitride (h-BN) is covered on its surface for protection, completing the preparation of the ferroelectric perovskite layer.

[0051] Example 1

[0052] A preparation method of a temperature fuse mechanism based on two-dimensional ferroelectric perovskite comprises the following steps:

[0053] The fuse prepared in Preparation Example 1 is sequentially connected to a photodetector, an operational amplifier, a voltage comparator, a control circuit (switch), and a power supply to obtain a temperature fuse mechanism, as shown in the schematic diagram. Figure 4 shown.

[0054] Among them, the light source (laser source), fuse and light detector use the optical path as a medium to obtain the status and information of the laser at different positions; the photodetector, operational amplifier, voltage comparator, control circuit (switch) and power supply are all connected by wires and are responsible for signal conversion and processing.

[0055] Performance testing experiment

[0056] The two-dimensional ferroelectric perovskite-based temperature fuse mechanism prepared in Example 1 is applied to a femtosecond laser, and the light source is provided by the laser to complete the connection between the units and the provision of signals.

[0057] The following performance tests were performed on the two-dimensional ferroelectric perovskite-based thermal fuse mechanism prepared in Example 1:

[0058] The first is the applicable temperature range, such as Figure 3 As shown in FIG1 , the fuse used in Example 1 exhibits temperature-dependent nonlinear absorption characteristics from room temperature (296K) to high temperature (400K), and remains stable at around 400K. Therefore, the main working area of the temperature fuse mechanism based on two-dimensional ferroelectric perovskite is around 380K, and the performance stable area can reach around 400K. Figure 3 The data shown demonstrates that the performance of the 2D ferroelectric perovskite-based thermal fuse mechanism is reversible and reusable. Conventional thermal fuses typically operate in a temperature range of 65°C to 150°C (338K to 423K), roughly the same as the 2D ferroelectric perovskite-based thermal fuse mechanism of the present invention, but lack the reusability.

[0059] In addition, regarding electrical indicators, taking the thermal fuse mechanism for femtosecond laser protection made in Example 1 as an example, the rated voltage is 240V, the rated current is 1.3A, and the maximum discharge current is 3A. Traditional thermal fuses used in small electronic devices have a rated current of 100mA to 500mA and a rated voltage of 5V to 24V. Thermal fuses used in industrial applications have a rated current of 1A to 5A, a rated voltage of 220V to 380V, and a maximum discharge current of 10A to 20A. Therefore, the thermal fuse mechanism based on two-dimensional ferroelectric perovskite provided in Example 1 reaches the level of industrial-grade fuses and can be safely used in optoelectronic devices such as lasers and photodetectors.

[0060] It should be understood that the application of the present invention is not limited to the above examples. For those skilled in the art, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A thermal fuse mechanism based on two-dimensional ferroelectric perovskite, characterized in that: The two-dimensional ferroelectric perovskite-based thermal fuse mechanism includes: A fuse, wherein the material of the fuse is a ferroelectric perovskite material; a light detection unit, configured to detect changes in the light signal of the fuse and convert the light signal into an electrical signal; a signal processing unit, electrically connected to the light detection unit, and configured to compare the electrical signal with a preset critical value; The control circuit unit is electrically connected to the signal processing unit and is used to control the circuit to switch between the loop state and the open circuit state.

2. The thermal fuse mechanism based on two-dimensional ferroelectric perovskite according to claim 1, characterized in that: The ferroelectric perovskite material is selected from (BA)2PbBr4, (BA)2MAPb2Br7, (BA)2(MA)2Pb3Br 10 One of them.

3. The thermal fuse mechanism based on two-dimensional ferroelectric perovskite according to claim 1, characterized in that: The thickness of the fuse is 0.5 mm.

4. The thermal fuse mechanism based on two-dimensional ferroelectric perovskite according to claim 1, characterized in that: The surface of the fuse is also covered with a hexagonal boron nitride film.

5. The thermal fuse mechanism based on two-dimensional ferroelectric perovskite according to claim 1, characterized in that: The signal processing unit includes an operational amplifier and a voltage comparator. The operational amplifier is used to amplify the electrical signal obtained by the light detection unit, and the voltage comparator is used to compare the amplified electrical signal with a preset critical value.

6. The thermal fuse mechanism based on two-dimensional ferroelectric perovskite according to claim 1, characterized in that: The light detection unit is a photodetector.

7. Use of the two-dimensional ferroelectric perovskite-based temperature fuse mechanism according to any one of claims 1 to 6 in optoelectronic devices.

8. The use according to claim 7, characterized in that The optoelectronic device is a laser, a laser cutting machine or a laser marking machine.

9. Application of ferroelectric perovskite materials in two-dimensional ferroelectric perovskite-based temperature fuse mechanisms.

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