Photovoltaic self-driven polarized light detection system

Abstract

The utility model belongs to the field of body photovoltaic technology, and discloses a body photovoltaic self-driven polarized light detection system, which comprises a box body, a control cover, a light processor, a polarized light detector, an alignment device and a signal receiver, the control cover is arranged at the upper end of the box body; the light processor is arranged on one side of the receiving light source in the box body and is used for receiving and processing the light signal; the polarized light detector is arranged in the box body, is positioned below the optical processor and is used for converting an optical signal processed by the optical processor into an electric signal; the polarized light detector is connected with the signal receiver through a wire. The device is simple in structure, small in size, convenient to carry and capable of remarkably improving the imaging effect and the object detection capacity, and has application value in the aspects of geological remote sensing, machine vision and the like. A polarization detection device is constructed by utilizing anisotropy of an intrinsic structure of a semiconductor material, and the problems of large size, complex structure and the like of a traditional polarization photoelectric detection system are solved.

Description

Technical Field

[0001] This application relates to the field of bulk photovoltaic technology, and particularly to a bulk photovoltaic self-driven polarized light detection system. Background Art

[0002] As an advanced optical detection technology, polarized light detection systems have been widely applied and deeply studied in many fields in recent years. In traditional optical detection, usually only the intensity and wavelength information of light are concerned, while the polarization characteristics of light are ignored. However, the polarization characteristics of light contain rich target information, such as the shape, texture, material, etc. of the target, which are of great significance for target recognition, classification, and detection.

[0003] Traditional optical detection systems have some limitations in certain application scenarios. For example, in complex environments such as haze and smoke, the intensity and wavelength information of light are easily interfered with, resulting in increased difficulty in target detection and recognition. While polarized light detection systems can effectively reduce the influence of environmental factors and improve the accuracy of target detection and recognition by analyzing the polarization characteristics of light. In addition, in some special application fields such as biomedicine and materials science, in-depth research on the microstructure and characteristics of targets is required, and traditional optical detection systems often fail to meet the requirements. Polarized light detection systems can provide more target information and strongly support the research in these fields.

[0004] At present, scholars at home and abroad have carried out a large amount of research work on polarized light detection systems. In terms of technology, it mainly focuses on aspects such as the acquisition, processing, and application of polarization information. In terms of the acquisition of polarization information, common methods include those based on optical elements such as polarizers, polarization prisms, wave plates, etc., and those based on instruments such as interferometers and spectrometers. These methods have their own advantages and disadvantages and need to be selected according to specific application requirements. In terms of the processing of polarization information, it mainly includes technologies such as denoising, enhancement, segmentation, and feature extraction of polarization images, as well as methods such as analysis and modeling of polarization data. In terms of the application of polarization information, it mainly involves fields such as target recognition, classification, detection, imaging, etc., as well as application fields such as biomedicine, materials science, and environmental monitoring.

[0005] However, existing polarization detection systems still have some problems and challenges. For example, the complexity and cost of the system are relatively high, making it difficult to achieve large-scale applications; the algorithms for acquiring and processing polarization information are not yet mature, affecting the performance and accuracy of the system; the stability and reliability of the system need to be improved, and further technological research and development and engineering practice are required. Therefore, developing a high-performance, low-cost, stable and reliable polarization detection system has important practical significance and application value. Polarization measurement technology is an advanced technology capable of characterizing microparticles. Its basic principle is to project polarized light onto microparticles and extract the microscopic structure information of the microparticles by measuring the intensity and polarization properties of the scattered light, reflected light or transmitted light of the microparticles.

[0006] The polarization detection devices in the prior art usually consist of an incident arm and a receiving arm. The incident arm provides incident polarized light, and the receiving arm receives scattered light, reflected light or transmitted light. However, when detecting the scattered light of microparticles at a certain angle using this structure, for example, when measuring the backward polarized scattered light at 120°, the incident arm and the receiving arm need to form a certain angle (such as a 60° angle), which results in a relatively large lateral size of the polarization detection device, occupying a large amount of space and being difficult to integrate and adjust.

[0007] With the development of technology, people are committed to researching and developing polarization light detection systems with characteristics such as high integration, miniaturization, and high performance to meet the growing needs in various fields. At the same time, new materials and methods are constantly being explored to solve the problems existing in existing polarization light detectors and improve their performance and application scope.

[0008] To solve the above problems, some improved polarization detection devices have emerged.

[0009] (1) A polarization detection device includes a beam emitting unit, a beam adjusting unit, and a beam receiving unit arranged in sequence along the optical path. Among them, the beam emitting unit is used to provide a polarized incident beam; the beam adjusting unit is used to control the polarized incident beam to be projected onto the microparticle to be measured; the beam receiving unit is used to receive the polarized scattered beam at a preset angle after the polarized incident light is scattered by the microparticle to be measured, and the optical axis of the beam emitting unit is parallel to the optical axis of the beam receiving unit. In some specific implementation manners, our beam adjusting unit may include a polarizer and a wave plate, and may also include a converging lens. Through the cooperation of these components, the adjustment of polarized light and the reception of the polarized scattered beam at a preset angle can be achieved.

[0010] (2) In the field of optoelectronic detection, polarization detectors can obtain more dimensional information compared to ordinary light detectors, and thus have extensive applications in the detection of hidden / camouflaged / faint targets, intelligent transportation, and other fields. However, the previous generations of polarization detection devices generally have disadvantages such as large volume, complex structure, and the need for complex calibration and calibration procedures, making it difficult to meet the current requirements for high integration, miniaturization, and high performance of optoelectronic devices. Therefore, we improved the system, relying on the bulk photovoltaic self-driving to reduce components such as power supplies, making the device smaller and with higher performance.

[0011] (3) In recent years, polarization detectors based on the anisotropy of low-dimensional materials have attracted much attention. However, the reported polarization detectors generally have a low anisotropy ratio, and the obtained signal current is mostly unipolar, resulting in problems such as complex systems and low judgment accuracy. In addition, although some self-driving polarization detectors with core-shell nanowire structures can achieve bipolar signals, they have problems such as difficult preparation, unfavorable for integration, and large noise generated by background natural light. We use two-dimensional perovskite ferroelectric single crystal materials with better anisotropy, through the bulk photovoltaic self-driving characteristics, to simplify the system, improve the accuracy of judging the signal current, and design the box of the system with light-tight materials to reduce the noise generated by background natural light. Summary of the Invention

[0012] The purpose of this application is to provide a bulk photovoltaic self-driving polarization light detection system, which uses the bulk photovoltaic effect through the structure itself to detect polarized light, so as to solve the problem that the current polarization light detection system needs to be improved by external power supply detection, and at the same time optimize the defects of complex structure and high failure rate, streamline the system, effectively improve the fault tolerance rate of the system, better optimize the detection range and applicable conditions of the system, and can significantly improve the imaging effect and the detection ability of objects, and has great application value in geological remote sensing, machine vision, etc. Using the anisotropy of the intrinsic structure of semiconductor materials to construct polarization detection devices is expected to solve the problems of large volume and complex structure of traditional polarization optoelectronic detection systems.

[0013] Therefore, this application provides a bulk photovoltaic self-driving polarization light detection system, and the technical solution adopted is as follows:

[0014] A bulk photovoltaic self-driving polarization light detection system includes a box body, a control cover, an optical processor, a polarization light detector, a butt joint device, and a signal receiver;

[0015] The control cover is arranged at the upper end of the box body;

[0016] The optical processor is arranged inside the box body on the side receiving the light source, and is used for receiving and processing optical signals;

[0017] The polarization light detector is disposed inside the box and below the optical processor, and is configured to convert the optical signal processed by the optical processor into an electrical signal;

[0018] The polarization light detector is connected to the signal receiver through a wire. The signal receiver is disposed outside the box. One end of the wire is connected to the polarization light detector, and the other end of the wire passes through the alignment device and is connected to the signal receiver. The alignment device is disposed on the side wall of the box.

[0019] Preferably, in the above-mentioned bulk photovoltaic self-driven polarization light detection system, the optical processor includes a polarizer and a wave plate; wherein, the wave plate is disposed below the polarizer.

[0020] Preferably, in the above-mentioned bulk photovoltaic self-driven polarization light detection system, the polarizer and the wave plate are respectively disposed on a rotating device.

[0021] Preferably, in the above-mentioned bulk photovoltaic self-driven polarization light detection system, the polarizer is a dichroic glass polarizer, and the wave plate is a zero-order quartz wave plate.

[0022] Preferably, in the above-mentioned bulk photovoltaic self-driven polarization light detection system, the control cover is an internally embedded box cover.

[0023] Preferably, in the above-mentioned bulk photovoltaic self-driven polarization light detection system, the polarization light detector includes a substrate, a two-dimensional perovskite ferroelectric single crystal layer, and a metal electrode. The two-dimensional perovskite ferroelectric single crystal layer adheres to the upper end of the substrate, and the metal electrode is located on the free surface outside the two-dimensional perovskite ferroelectric single crystal layer. The metal electrode is externally connected to a wire and is connected to the signal receiver through the alignment device to receive signals.

[0024] Preferably, in the above-mentioned bulk photovoltaic self-driven polarization light detection system, the substrate is a silicon wafer or quartz glass.

[0025] Preferably, in the above-mentioned bulk photovoltaic self-driven polarization light detection system, the thickness of the metal electrode is 110-130 nm.

[0026] Preferably, in the above-mentioned bulk photovoltaic self-driven polarization light detection system, the box is made of aluminum alloy material.

[0027] Preferably, in the above-mentioned bulk photovoltaic self-driven polarization light detection system, the alignment device is a stainless steel wire threading hole.

[0028] The beneficial effects of the present application are:

[0029] (1) Compared with large-scale polarized light detection systems, this system has the advantage of self-driving by bulk photovoltaic effect without an external power supply. At the same time, it is small in size, portable, has a rich range of practical scenarios, and can better improve the detection effect.

[0030] (2) The structure of this system is simple and practical, with modular settings and low failure rate.

[0031] (3) This system is applicable to a variety of polarized light detection scenarios and has multi-purpose properties.

[0032] (4) The device of this system can be connected to external device wires for a series of optical signal reception tests. Brief Description of the Drawings

[0033] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0034] Figure 1 Shows a schematic diagram of the simple structure of a bulk photovoltaic self-driven polarized light detection system according to an embodiment of the present application.

[0035] Figure 2 Shows a three-dimensional structure diagram of the box part in a bulk photovoltaic self-driven polarized light detection system according to an embodiment of the present application.

[0036] Figure 3 Shows a schematic diagram of the structure of an optical processor in a bulk photovoltaic self-driven polarized light detection system according to an embodiment of the present application.

[0037] Figure 4 Shows a schematic diagram of the structure of a control cover in a bulk photovoltaic self-driven polarized light detection system according to an embodiment of the present application.

[0038] Figure 5 Shows a schematic diagram of the structure of a polarized light detector in a bulk photovoltaic self-driven polarized light detection system according to an embodiment of the present application.

[0039] Figure 6 Shows a schematic diagram of the connection of the metal electrodes of a polarized light detector in a bulk photovoltaic self-driven polarized light detection system according to an embodiment of the present application. Brief Description of the Drawings:

[0041] 100, Box; 200, Control cover; 300, Optical processor; 301, Polarizer; 302, Wave plate; 303, Rotating device; 400, Polarized light detector; 401, Substrate; 402, Two-dimensional perovskite ferroelectric single crystal layer; 403, Metal electrode; 500, Alignment device; 600, Signal receiver. Detailed implementation manners

[0042] The following uses specific specific examples to illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0043] The following combines the drawings and embodiments to further describe the specific implementation manners of the present application in detail.

[0044] The embodiment of the present application provides a bulk photovoltaic self-driven polarized light detection system, as Figures 1 to 6 shown. The bulk photovoltaic self-driven polarized light detection system includes a box 100, a control cover 200, an optical processor 300, a polarized light detector 400, an alignment device 500, and a signal receiver 600. The control cover 200 is arranged at the upper end of the box 100; the optical processor 300 is arranged inside the box 100 on the side receiving the light source for receiving and processing optical signals; the polarized light detector 400 is arranged inside the box 100 and below the optical processor 300 for converting the optical signals processed by the optical processor 300 into electrical signals; the polarized light detector 400 is connected to the signal receiver 600 through a wire (not shown in the figure). The signal receiver 600 is arranged outside the box 100. One end of the wire is connected to the polarized light detector 400, and the other end of the wire passes through the alignment device 500 and is connected to the signal receiver 600. The alignment device 500 is arranged on the side wall of the box 100.

[0045] In this embodiment, the box 100 is made of light-blocking materials, such as stainless steel materials, aluminum alloy materials, etc. The upper end of the box 100 is open, and this opening is closed by the movable control cover 200. When the system is in use, the control cover 200 is opened, and when it is not in use, the control cover 200 is closed, thereby effectively protecting the optical processor 300 and the polarized light detector 400 located inside the box 100.

[0046] When the system is in use, the control cover 200 is opened, and light irradiates into the interior of the box body 100 from above the box body 100. The optical processor 300 is used to receive and process the optical signal to convert the optical signal into polarized light that is convenient for detection. The polarized light will be detected by the polarized light detector 400, and then the corresponding electrical signal is obtained. The electrical signal is transmitted through a wire to the signal receiver 600 for analysis.

[0047] In some embodiments, such as Figure 2 and Figure 3 shown, the optical processor 300 includes a polarizer 301 and a wave plate 302; wherein, the wave plate 301 is disposed below the polarizer 302.

[0048] Exemplarily, the polarizer uses a dichroic glass polarizer with a high extinction ratio. The wave plate uses a zero-order quartz wave plate with accurate phase delay.

[0049] In some embodiments, such as Figure 3 shown, the polarizer 301 and the wave plate 302 are respectively disposed on a rotating device 303; wherein the two rotating devices 303 are used to respectively drive the polarizer 301 and the wave plate 302 to rotate. When the system is in use, the optical signal incident from the top of the box body 100 is adjusted by passing through the polarizer 301 and the wave plate 302 through the rotation of the rotating device 303, changing the direction of the polarized light, detecting the photocurrent of the detector under different polarized light irradiations, and testing the performance parameters of the device such as photocurrent, sensitivity, responsivity, detectivity, and photoelectric switching ratio under different optical wavelength bands and light intensity conditions. Only as an example, the rotation accuracy of the rotating device 303 designed on the polarizer 301 and the wave plate 302 can reach 0.1°.

[0050] In some embodiments, such as Figure 4 shown, the control cover 100 uses an embedded box cover with good sealing performance and not easy to pollute the interior of the device.

[0051] In some embodiments, such as Figure 5 and Figure 6 shown, the polarized light detector 400 includes a substrate 401, a two-dimensional perovskite ferroelectric single crystal layer 402, and a metal electrode 403. The two-dimensional perovskite ferroelectric single crystal layer 402 adheres to the upper end of the substrate 401, and the metal electrode 403 is located on the free surface outside the two-dimensional perovskite ferroelectric single crystal layer 402. The metal electrode 403 is externally connected with a wire and is connected to the signal receiver 600 through a butting device 500 for signal reception.

[0052] In this embodiment, the polarization photodetector 400 uses a glass substrate as the substrate 401. After cleaning with absolute ethanol, it is placed in a vacuum drying oven for drying to remove surface contaminants and impurities, ensuring the purity of the substrate 401 surface. Gas blowing or organic solvent rinsing is used to remove the residual solvent or impurities on the surface of the two-dimensional perovskite ferroelectric single crystal and dry it in a vacuum drying oven. The drying temperature in the vacuum drying oven is 30 - 80 °C, and the drying time is 10 - 12 h. The two-dimensional perovskite ferroelectric single crystal layer 402 is adhered to one side of the substrate. Then, an Au / Ag electrode is evaporated on the outer free surface of the processed two-dimensional perovskite ferroelectric single crystal layer 402 to obtain a detection device, and the thickness of the evaporated metal electrode 403 is 120 nm. The obtained device is tested. Light passes through a polarizer and a half-wave plate and then irradiates on the two-dimensional halide perovskite ferroelectric single crystal on the detector surface. The single crystal absorbs light to generate a photocurrent. By rotating the half-wave plate to change the direction of the polarized light from 0° to 360°, the photocurrent of the detector under different polarized light irradiations is detected. The performance parameters such as photocurrent, sensitivity, responsivity, detectivity, and photoelectric switching ratio of the device are tested under different optical wavelength bands and light intensity conditions. Thus, the initial parameters of the device are obtained.

[0053] In some embodiments, the material of the box body 100 is selected as aluminum alloy material with good light-tightness and heat insulation.

[0054] In some embodiments, the material of the substrate 401 is selected as a silicon wafer or a quartz glass substrate that has been rinsed with absolute ethanol and is pollution-free.

[0055] In some embodiments, the two-dimensional perovskite ferroelectric single crystal layer 402 is selected as (BA)2(MA)3Pb4I with high stability and good optoelectronic performance. 13 。

[0056] In some embodiments, the thickness of the electrode material evaporated on the surface of the two-dimensional perovskite ferroelectric single crystal material is 120 nm, which is used to improve the current transmission and does not affect the two-dimensional perovskite ferroelectric single crystal material's reception of light.

[0057] In some embodiments, the external wire uses tinned copper with a cross-linked polyethylene (XLPE) outer layer.

[0058] In some embodiments, the signal receiver 600 uses a National Instruments (NI) data acquisition card.

[0059] In some embodiments, the mating device 500 uses a stainless steel wire threading hole, which can be well fixed and reduce the influence of the environment on the wire threading hole.

[0060] The working principle of this bulk photovoltaic self-driven polarization photodetection system is as follows:

[0061] The housing 100 is an outer shell used to contain the main body of the entire system. The control cover 200 is located at the top of the housing 100 to control the switch of the entire system. The polarizer 301 and the wave plate 302 are placed at the receiving light source end. The polarized light detector 400 is the main body of the system, which is used to convert the optical signal into an electrical signal for processing the optical signal. The signal receiver 600 is connected to the polarized light detector 400 to receive the magnitude of the photocurrent output by the polarized light detector 400.

[0062] The control cover 200 is installed at the uppermost end of the housing 100 to control the switch of the housing. The optical processor 300 is installed on the side of the housing 100 that receives the light source. Among them, the polarizer 301 is installed on the side close to the light source, and the wave plate 302 is installed to receive the optical signal and process the polarization angle of the light. The polarized light detector 400 is used as the main body to detect the received optical signal and thus output a photocurrent. The signal receiver 600 is installed outside the housing 100 to receive the photocurrent output by the polarized light detector. Thus, the optical signal received by the entire system is analyzed. The self-driven polarized light detector structure based on the bulk photovoltaic effect is, from bottom to top: the substrate 401, the two-dimensional perovskite ferroelectric single crystal layer 402 adhered to the substrate, and the metal electrode 403 plated on the outside of the single crystal layer. The two-dimensional perovskite ferroelectric single crystal layer 402 is adhered to the substrate 401. The metal electrode 403 is located on the free surface outside the two-dimensional perovskite ferroelectric single crystal layer 402. The metal electrode 403 is externally connected to a wire and connected to the signal receiver 600 through the docking device 500 for signal reception.

[0063] In summary, a bulk photovoltaic self-driven polarized light detection system provided by an embodiment of the present application has a simple structure, is small and portable, and is easy to use. It detects polarized light through self-driving by the bulk photovoltaic effect, enabling the device to detect directly without an external power supply, which can significantly improve the imaging effect and the detection ability of objects, and has great application value in geological remote sensing, machine vision, etc.

[0064] The above embodiments are only used to illustrate the present application and are not intended to limit the present application. Those of ordinary skill in the relevant technical fields can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions also belong to the scope of the present application. The patent protection scope of the present application shall be defined by the claims.

Claims

1. A bulk photovoltaic self-driven polarized light detection system, characterized in that It includes a box body, a control cover, an optical processor, a polarized light detector, a butting device, and a signal receiver; The control cover is arranged at the upper end of the box body; The optical processor is arranged inside the box body on the side receiving the light source and is used for receiving and processing optical signals; The polarized light detector is arranged inside the box body and below the optical processor and is used for converting the optical signals processed by the optical processor into electrical signals; The polarized light detector is connected to the signal receiver through a wire. The signal receiver is arranged outside the box body. One end of the wire is connected to the polarized light detector, and the other end of the wire passes through the butting device and is connected to the signal receiver. The butting device is arranged on the side wall of the box body.

2. The bulk photovoltaic self-driven polarized light detection system according to claim 1, wherein The optical processor includes a polarizer and a wave plate; wherein, the wave plate is arranged below the polarizer.

3. The bulk photovoltaic self-driven polarized light detection system according to claim 2, wherein The polarizer and the wave plate are respectively arranged on a rotating device.

4. The bulk photovoltaic self-powered polarized light detection system according to claim 2, wherein The polarizer is a dichroic glass polarizer, and the wave plate is a zero-order quartz wave plate.

5. The bulk photovoltaic self-driven polarized light detection system according to claim 1, wherein The control cover is an internally embedded box cover.

6. The bulk photovoltaic self-driven polarized light detection system according to claim 1, wherein The polarized light detector includes a substrate, a two-dimensional perovskite ferroelectric single crystal layer, and a metal electrode. The two-dimensional perovskite ferroelectric single crystal layer adheres to the upper end of the substrate, and the metal electrode is located on the free surface outside the two-dimensional perovskite ferroelectric single crystal layer. The metal electrode is externally connected to a wire and is connected to the signal receiver through the butting device for signal reception.

7. The bulk photovoltaic self-driven polarized light detection system according to claim 6, characterized in that, The substrate is a silicon wafer or quartz glass.

8. The bulk photovoltaic self-driven polarized light detection system according to claim 6, characterized in that, The thickness of the metal electrode is 110 - 130 nm.

9. The bulk photovoltaic self-driven polarized light detection system according to claim 1, characterized in that The box body is made of an aluminum alloy material.

10. The bulk photovoltaic self-driven polarized light detection system according to claim 1, wherein, The butting device is a stainless steel wire passing hole.

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