A multifunctional solar cell detection device and its monitoring system
By integrating a multi-wavelength LED array panel, a surface array detector, a fiber optic spectrometer, and a controller, a multi-functional solar cell testing device has been developed, solving the problems of high cost and space waste caused by multiple devices in existing technologies, and achieving efficient solar cell performance evaluation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZOLIX INSTRUMENTS CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-06-30
AI Technical Summary
Current solar cell performance evaluation requires multiple testing devices, resulting in high costs, space occupation, and wasted human resources.
Design a multifunctional solar cell testing device that integrates a multi-wavelength LED array panel, a surface array detector, a fiber optic spectrometer, a source meter, and a controller to achieve integrated testing of current-voltage characteristics, electroluminescence, and photoluminescence, thereby reducing the number of devices and space required.
It integrates multiple performance evaluation functions, reducing equipment procurement costs and testing labor time costs, while improving testing efficiency.
Smart Images
Figure CN224438949U_ABST
Abstract
Description
Technical Field
[0001] This application relates to solar cells, and more particularly to a multifunctional solar cell detection device and its monitoring system. Background Technology
[0002] Solar energy, as a clean and renewable energy source, is gradually changing the way people use energy. Devices that directly convert light / solar energy into electrical energy, namely solar cells, require performance testing and evaluation during the research and production process.
[0003] Existing methods for evaluating and testing the performance of solar cells mainly include: current-voltage characteristic testing, photoelectric conversion efficiency testing, electroluminescence performance testing, and photoluminescence performance testing. These different performance evaluation and testing methods require different testing equipment. Current-voltage characteristic testing and photoelectric conversion efficiency testing are used to evaluate the photoelectric conversion performance of solar cells. Electroluminescence performance testing, by detecting and analyzing information such as brightness, uniformity, and local defects in the emitted light image, can detect internal defects such as microcracks, broken grids, and short circuits. Electroluminescence detection is an effective non-destructive testing method, commonly used in the production quality control and fault diagnosis of solar cells. Photoluminescence detection technology can analyze the quality and uniformity of internal materials and defect distribution of solar cells, offering advantages such as non-contact, speed, and sensitivity, and can obtain internal information of the cell without damaging its structure.
[0004] There are various types of photovoltaic performance evaluation for solar cells, and different evaluation methods require different testing equipment. For example, current-voltage characteristic testing and photoelectric conversion efficiency testing require a solar simulator, electroluminescence performance testing requires an electroluminescence (EL) testing system, and photoluminescence performance testing requires a photoluminescence (PL) testing system. Electroluminescence performance testing also includes testing of electroluminescence spectra and electroluminescence imaging. Photoluminescence performance testing also includes testing of photoluminescence spectra and photoluminescence imaging.
[0005] In summary, existing technologies for evaluating the photoelectric performance of solar cells often require the purchase of multiple testing devices, which incurs significant financial costs. Furthermore, these testing devices typically require a larger footprint, and operating such a large number of devices also represents a waste of human resources. Utility Model Content
[0006] In view of this, the main objective of this application is to provide a multifunctional solar cell testing device and its monitoring system. This testing device can perform current-voltage characteristic testing, single-wavelength electroluminescence imaging testing, electroluminescence spectroscopy testing, single-wavelength photoluminescence imaging testing, and photoluminescence spectroscopy testing on solar cell samples, thereby evaluating various performance characteristics of the solar cell samples under test. This reduces the space occupied by the device / equipment and significantly lowers the procurement cost of the device / equipment, while also saving labor and time costs for conducting related tests.
[0007] To achieve the above objectives, this application adopts the following technical solution:
[0008] A multifunctional solar cell detection device includes a multi-wavelength LED array panel 1, a surface array detector 2, a fiber optic spectrometer 6, a source meter 7, and a controller 8; wherein...
[0009] A multi-wavelength light-emitting diode (LED) array board 1 is used to emit LED light with a variety of arbitrary wavelength combinations;
[0010] Array detector 2 is used for optical imaging testing;
[0011] Fiber optic spectrometer 6 is used to acquire spectral signals;
[0012] Source table 7 is used to acquire the voltage and / or current signals output by the solar cell sample under test; and outputs the voltage and current signals, as well as the acquired signal, to the controller 8; and,
[0013] The controller 8 is used to control the multi-wavelength LED array panel 1 to achieve controlled output of LED light with multiple arbitrary wavelength combinations; it is also used to control the area array detector 2 to acquire images of the solar cell sample under test; it is used to control the fiber optic spectrometer 6 to acquire spectral signals; and it is used to control the source meter 7 to test the voltage-current characteristic curve based on the voltage signal and / or current signal.
[0014] The detection device further includes a bandpass filter 3 for filtering multispectral LED light to allow monochromatic light of a certain wavelength or composite light of a combination of certain wavelengths to pass through.
[0015] The detection device also includes a reflector 4 for reflecting the light from the multi-wavelength LED array plate.
[0016] The detection device also includes a sample stage 5 for placing the solar cell sample to be tested.
[0017] A monitoring system including the aforementioned multifunctional solar cell detection device.
[0018] Further: The monitoring system includes: a data receiving device, a data processing device, and a data display device; the data receiving device is data-connected to the controller 8, and the data processing device is connected to both the data receiving device and the controller 8; the data display device is connected to both the controller 8 and the data processing device; the data display device is used to display the electrical signals and their images output by the controller 8 in real time in Chinese / English and graphical interface, as well as to display the detection results and their images processed by the data processing device.
[0019] The multifunctional solar cell detection device and monitoring system of this invention have the following advantages compared with the prior art:
[0020] (1) The multifunctional solar cell detection device of this utility model can control the multi-wavelength LED array plate 1 to output LED light of various wavelengths through the controller 8, and use the area array detector 2 to perform optical imaging test, and use the fiber optic spectrometer 6 and / or source meter 7 to collect the output voltage and / or current signal of the solar cell sample under test, thereby performing volt-ampere characteristic test, single-wavelength electroluminescence imaging test, electroluminescence spectroscopy test, single-wavelength photoluminescence imaging test, photoluminescence spectroscopy test, etc., to evaluate the performance of the solar cell sample under test in various ways.
[0021] (2) This multifunctional solar cell testing device can integrate the above performance tests into one device to achieve the above functions such as current-voltage characteristic testing, photoelectric conversion efficiency testing, single-wavelength electroluminescence imaging testing, electroluminescence spectroscopy testing, single-wavelength photoluminescence imaging testing, and photoluminescence spectroscopy testing. This not only reduces the space occupied by the device / equipment, but also significantly reduces the procurement cost of the device / equipment, while also saving the labor and time costs of conducting related tests.
[0022] (3) This utility model is not only applicable to the testing of solar cells, but also applicable to the performance testing of various similar optoelectronic devices. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of the multifunctional solar cell detection device according to an embodiment of the present invention;
[0024] Figure 2 This is a schematic diagram showing the distribution of the multi-channel LED1 and the area array detector2 in an embodiment of the present invention.
[0025] Figure 3a and Figure 3b This is a flowchart illustrating the method for testing multifunctional solar cells using EL and PL testing methods according to an embodiment of the present invention.
[0026] Figure 4 Figure 3 shows the current-voltage characteristic curve and test results obtained by performing the current-voltage characteristic test according to the procedure shown in Figure 3 of this utility model.
[0027] Figure 5 This is a schematic diagram of the surface image of the multifunctional solar cell subjected to PL / EL imaging test according to the process shown in Figure 3 of this utility model.
[0028] Figure 6 This is a schematic diagram of the spectral curve of the fiber optic spectrometer when the test is performed according to the process shown in Figure 3 of this utility model. Detailed Implementation
[0029] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.
[0030] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0031] Figure 1 This is a schematic diagram illustrating the structure of the multifunctional solar cell detection device according to an embodiment of the present invention. Figure 2 This is a schematic diagram showing the distribution of the multi-channel light-emitting diode (LED) 1 and the area array detector 2 in an embodiment of the present invention.
[0032] like Figure 1 As shown, this multifunctional solar cell detection device mainly includes a multi-wavelength LED array panel 1, a surface array detector 2, a bandpass filter 3, a reflector 4, a sample stage 5, a fiber optic spectrometer 6, a source meter 7, and a controller 8. As shown in the figure, the red arrows and their transmission paths represent the optical path, and the blue arrows and their transmission paths represent the electrical signal.
[0033] in:
[0034] The multi-wavelength LED array board 1 can emit LED light of various arbitrary wavelengths or combinations of arbitrary wavelengths under the control of the controller 8, including those used to simulate the solar spectrum.
[0035] like Figure 2 As shown, the multi-wavelength LED array board 1, under the control of the controller 8, can output LED light of various wavelengths such as 340nm / 365nm / 385nm / 395nm / 405nm / 425nm / 500nm / 570nm / 600nm / 620nm / 660nm / 680nm / 700nm / 740nm / 780nm / 1050nm / 1200nm / white light or any combination of such wavelengths.
[0036] The area array detector 2 is used for optical imaging testing. Specifically, the area array detector 2 can be an area array CCD, an area array CMOS, etc.
[0037] Preferably, in one embodiment of this application, the multi-wavelength LED array board 1 and the area array detector 2 can be integrated into a single unit to form a multi-wavelength LED emitting and area array detection device. In this embodiment, the multi-wavelength LED array board 1 is a circuit board with various LED beads of different wavelengths distributed on it, and an opening is made in the middle of the circuit board. The area array detector 2 is then fixed in the middle of the circuit board.
[0038] The bandpass filter 3 is used to filter multispectral LED light so that monochromatic light of a certain wavelength or composite light of certain wavelength combinations can pass through.
[0039] The reflector 4 is used to reflect the light from the multi-wavelength LED array panel. Specifically, the reflector 4 is a cylindrical reflector.
[0040] The sample stage 5 is used to place the solar cell sample to be tested and to connect the electrode input terminal or the output electrical signal terminal of the solar cell sample.
[0041] The fiber optic spectrometer 6 is used to acquire spectral signals.
[0042] The source meter 7 is used to collect (e.g., from the sample stage 5) the voltage / current signal output by the solar cell sample under test, and output the voltage / current signal to the controller 8.
[0043] Preferably, the source table 7 can output only voltage or current signals for EL excitation, or it can output voltage / current signals while simultaneously acquiring current / voltage signals from the solar cell sample under test.
[0044] The controller 8 is used to control the multi-wavelength LED array panel 1 to achieve control output of LED light with multiple arbitrary wavelength combinations; it is also used to control the area array detector 2 to acquire images of the solar cell sample under test; it is also used to control the fiber optic spectrometer 6 to acquire spectral signals; and it is used to control the source meter 7 to output voltage signals for current testing to obtain the volt-ampere characteristic curve.
[0045] Based on the same inventive concept, this application also provides a monitoring system including the aforementioned multifunctional solar cell detection device. The monitoring system further includes: a data receiving device, a data processing device, and a data display device. The data receiving device is data-connected to the controller 8; the data processing device is connected to both the data receiving device and the controller 8; and the data display device is connected to both the controller 8 and the data processing device. It is used to display, in real-time, the received electrical signals, such as voltage / current signals output by the controller 8, and their images, in Chinese / English and a graphical interface, as well as the detection results and their images processed by the data processing device, such as volt-ampere characteristic curves and power-temperature curves.
[0046] Figure 3a and Figure 3b This is a flowchart illustrating the method for testing multifunctional solar cells using EL and PL testing methods according to an embodiment of this utility model.
[0047] like Figure 3a and Figure 3b As shown, the multifunctional solar cell detection method includes the following steps:
[0048] The steps for performing current-voltage characteristic testing and obtaining photoelectric conversion efficiency test results include:
[0049] Step 311: The controller 8 is used to control the multi-wavelength LED array plate 1 to simulate the solar spectrum and irradiate the solar cell sample under test (including direct irradiation and irradiation after reflection by the reflector 4), and the generated current signal is passed through the source meter 7.
[0050] Step 312: Then control the source meter 7 to output the volt-ampere characteristic test curve. The light / electric conversion efficiency of the solar cell sample under test can be calculated using the volt-ampere characteristic test curve. For example... Figure 4 As shown, the voltage-current characteristic curve obtained from the test in this embodiment shows that the tested solar cell sample, under a certain light intensity (e.g., 100mW / cm²), exhibits good voltage performance. 2 At a certain temperature, the output power of a solar cell changes with voltage according to the voltage-power curve. Based on the current-voltage characteristic test curve, parameters such as the light / electric conversion efficiency, fill factor, and maximum power point of the solar cell sample under different conditions can be calculated.
[0051] The steps for performing single-wavelength electroluminescence (EL) imaging tests include:
[0052] Step 321: Using controller 8, the source meter 7 outputs voltage / current to the solar cell sample under test on the sample stage 5, causing the sample to emit light. The array detector 2 is then controlled to acquire an image, resulting in electroluminescence imaging. For example... Figure 5 As shown, the defects on the surface of the solar cell sample can be clearly seen through the EL imaging test.
[0053] The steps for performing multi-wavelength electroluminescence (EL) spectroscopy include:
[0054] Step 331: The controller 8 controls the source meter 7 to output voltage / current to the solar cell sample under test on the sample stage 5. The sample emits light, and the fiber optic spectrometer 6 is controlled to collect multi-wavelength spectra to obtain multi-wavelength electroluminescence spectra. Figure 6 As shown, the peak and intensity information of the spectral curves can be used to analyze whether the materials of the solar cell sample are consistent or whether the process has been changed, and to evaluate the efficiency of the solar cell.
[0055] The steps for performing single-wavelength photoluminescence (PL) imaging tests include:
[0056] Step 341: The controller 8 controls the output light of a certain wavelength of the multi-wavelength LED array plate 1 to illuminate the solar cell sample under test. The sample emits light, and the control array detector 2 collects the photoluminescence imaging image.
[0057] The steps for performing multi-wavelength photoluminescence (PL) spectroscopy include:
[0058] Step 351: The controller 8 controls the output light of multiple wavelengths from the multi-wavelength LED array plate 1 to illuminate the solar cell sample under test. The sample emits light, and the fiber optic spectrometer 6 is controlled to collect the spectrum to obtain a photoluminescence spectrum image. Figure 5 As shown, the defects on the surface of the solar cell sample can be clearly seen through the PL imaging test.
[0059] like Figure 6 The image shown is the emission spectrum obtained by the fiber optic spectrometer during testing according to the process shown in Figure 3 of this invention. The performance of solar cell materials can be analyzed based on the photoluminescence spectral width and peak information; for example, during mass production, the peak positions can be used to determine whether the materials are consistent.
[0060] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.
Claims
1. A multifunctional solar cell detection device, characterized in that, The detection device includes: a multi-wavelength light-emitting diode (LED) array plate (1), an area array detector (2), a fiber optic spectrometer (6), a source meter (7), and a controller (8); wherein: A multi-wavelength LED array board (1) is used to emit LED light with a variety of arbitrary wavelength combinations; A planar array detector (2) is used for optical imaging tests; Fiber optic spectrometer (6) is used to acquire spectral signals; Source meter (7) is used to acquire the voltage signal and / or current signal output by the solar cell sample under test; and outputs the voltage signal and current signal, as well as the acquired signal, to the controller (8); and, The controller (8) is used to control the multi-wavelength LED array plate (1) to achieve control output of LED light with multiple arbitrary wavelength combinations; it is also used to control the area array detector (2) to acquire images of the solar cell sample under test; it is used to control the fiber optic spectrometer (6) to acquire spectral signals; and it is used to control the source meter (7) to test the voltage-current characteristic curve based on the voltage signal and / or current signal.
2. The multifunctional solar cell detection device according to claim 1, characterized in that, The detection device further includes a bandpass filter (3) for filtering multispectral LED light to allow monochromatic light of a certain wavelength or composite light of a combination of certain wavelengths to pass through.
3. The multifunctional solar cell detection device according to claim 1, characterized in that, The detection device further includes a reflector tube (4) for reflecting the light from the multi-wavelength LED array plate.
4. The multifunctional solar cell detection device according to claim 1, characterized in that, The detection device further includes a sample stage (5) for placing the solar cell sample to be tested.
5. A monitoring system comprising the multifunctional solar cell detection device according to any one of claims 1 to 4.
6. The monitoring system of the multifunctional solar cell detection device according to claim 5, characterized in that, The monitoring system includes: a data receiving device, a data processing device, and a data display device; wherein, the data receiving device is connected to the controller (8) via data connection, and the data processing device is connected to the data receiving device and the controller (8) respectively; the data display device is connected to the controller (8) and the data processing device respectively; the data display device is used to display the electrical signals and their images output by the controller (8) in real time in Chinese / English and graphical interface mode, as well as to display the detection results and their images after being processed by the data processing device.