Quantum dot stability rapid testing device and method

Abstract

The invention provides a quantum dot stability rapid test device and method.The test device comprises a sealed test box, a sample support, a light source, a gas supply assembly, a test environment monitoring assembly, a sample detection assembly and a control and processing system, a water tank is arranged in the test box, a heating plate is arranged at the bottom of the water tank, and the sample support is arranged in the test box; light emitted by the light source can irradiate a to-be-tested sample, the gas supply assembly is communicated with the test box through a gas supply pipeline, the test environment monitoring assembly comprises a temperature sensor, a humidity sensor and a pressure sensor, the sample detection assembly comprises a photoelectric detector, and the control and processing system supplies gas to family members according to the temperature, humidity and pressure in the box body. When the temperature, the humidity and the pressure in the box body reach set values, the light source and the photoelectric detector are controlled to be started, and optical parameters of the to-be-detected sample are obtained. The rapid test device and method can improve the severity of aging test conditions in multiple aspects, accelerate the aging test, and greatly shorten the aging test period.

Description

Technical Field

[0001] The present invention relates to the technical field of semiconductor material detection, and in particular to a device and method for rapid testing of quantum dot stability. Background Art

[0002] In recent years, quantum dots, as a new type of nano fluorescent material, have quickly attracted attention from all walks of life in the field of display and lighting. Quantum dots have many excellent optical properties, such as precise adjustment of the wavelength of emitted light, narrow half-width of the emission peak, and high fluorescence quantum yield. These advantages can be used to achieve high-quality lighting and ultra-wide color gamut display devices. Making these quantum dots into diffusers and applying them to LCD devices can not only improve the color gamut of traditional liquid crystal display devices and enhance display quality, but also because the concentration of quantum dots in the diffuser is low, compared with quantum dot TVs based on quantum dot films, the cost is lower and the heavy metal toxicity content is lower.

[0003] The encapsulation of quantum dot film is to sandwich the quantum dot film with two layers of water and oxygen resistant barrier film in the middle, while the quantum dot diffusion plate is to evenly mix the quantum dots with polystyrene (PS) particles and then melt the PS at high temperature to further evenly mix with the quantum dots. Finally, the mixed PS+quantum dots are discharged, cooled, and solidified in the shape of a flat plate with a thickness of 1-2mm to finally form a quantum dot diffusion plate. However, the packaging form of quantum dot diffusion plate is simpler than that of quantum dot film, and quantum dots are more susceptible to corrosion and aging by water, oxygen, and blue light, and often have poor stability. Therefore, in the experimental, R&D, pilot, and large-scale quality inspection stages of quantum dot diffusion plates, there is a need for quantum dot stability test methods to judge and expect the stability of the diffusion plate after long-term work.

[0004] At present, the stability test method for quantum dot materials and quantum dot films, quantum dot diffusion plates and other related products is based on the aging test method of traditional semiconductor devices, that is, using 6090 (temperature 60°C, relative humidity 90%) aging test or double 85 aging test (temperature 85°C, relative humidity 85%), and then adding blue light sources of different powers to irradiate the samples. Samples are taken out at regular intervals to test the stability and change of the corresponding brightness, color coordinates and other numerical values ​​of the samples, so as to estimate the stability of the samples during normal operation.

[0005] However, since these aging conditions are not strict, it often takes a period of 1 to 6 weeks to accurately evaluate the stability and aging life of a sample. In addition, the process of taking out the sample for measurement each time is cumbersome and cannot fully record the complete changes in the sample's optical parameters during the aging period. Summary of the invention

[0006] In order to better solve the above problems, the present invention provides a quantum dot stability rapid testing device and method and a copper busbar coding method, which can realize automatic grasping and coding of copper busbar products, thereby improving the production efficiency of copper busbar products.

[0007] To achieve the above-mentioned purpose, an embodiment of the present invention provides a quantum dot stability rapid testing device, comprising: a test box, the box body is sealed, a water tank is provided at the bottom of the box, the water tank contains water, and a heating plate is provided at the bottom of the water tank; a sample holder is provided in the test box; a light source, which emits light to illuminate the sample to be tested on the sample holder; a gas supply component, which is connected to the test box through a gas supply pipeline and is used to pass gas into the test box; a test environment monitoring component, which includes a temperature sensor, a humidity sensor and a pressure sensor provided in the test box; a sample detection component, which includes a photoelectric detector provided in the test box; a control and processing system, which is divided into They are electrically connected to the heating plate, the air supply assembly, the temperature sensor, the humidity sensor and the pressure sensor, and are used to control the start and stop of the heating plate and the heating power according to the temperature and humidity information in the box detected by the temperature sensor and the humidity sensor, and to control the on / off and flow rate of the air supply pipeline according to the pressure information in the box detected by the pressure sensor, and to control the light source and the photoelectric detector to start when the temperature in the box reaches the temperature setting threshold, the humidity reaches the humidity setting threshold, and the pressure reaches the pressure setting threshold; they are also electrically connected to the photoelectric detector to obtain the luminescence information of the sample to be tested detected by the photoelectric detector, and to obtain the optical parameters of the sample to be tested.

[0008] Optionally, the gas supply assembly includes a plurality of gas cylinders respectively connected to the test box, and different types of gases are stored in the plurality of gas cylinders respectively.

[0009] Optionally, a flow regulating valve is provided on the gas supply pipeline connecting the gas tank and the test box, and the control system is also electrically connected to the flow regulating valve for controlling the gas flow entering the test box.

[0010] Optionally, the test environment monitoring component also includes a gas content detector, which is arranged in the test box; the control system is also electrically connected to the gas content detector, and is used to control the ventilation flow of the corresponding gas supply pipeline according to the content information of the specified gas in the box detected by the gas content detector.

[0011] Optionally, the light source is an external light source arranged outside the test box, and a transparent window is arranged on the test box at a location corresponding to a path where the external light source illuminates the sample to be tested.

[0012] Optionally, the light source includes a plurality of spare light sources capable of emitting different types of light, and / or the light power density of the light source is adjustable.

[0013] Optionally, the main wavelength of the light source is in the range of 400-480 nm, and the light power density of the light irradiated to the quantum dot sample is in the range of 0.001-1000 W / cm 2 .

[0014] Optionally, a pressure relief port is provided on the box body of the test box, a pressure relief valve is provided in the pressure relief port, and the control system is also electrically connected to the pressure relief valve.

[0015] Optionally, the temperature setting threshold ranges from 20 to 400°C, the humidity setting threshold ranges from 50 to 95%, and the pressure setting threshold ranges from 10 5 ~5×10 7 Pa.

[0016] According to another aspect of an embodiment of the present invention, a method for rapid testing of quantum dot stability is also provided. The method uses the above-mentioned quantum dot stability rapid testing device to perform copper busbar coding, and includes the following steps: a sample preparation step: placing the sample to be tested on a sample holder in a test box, adding a set amount of water to a water tank, closing the sample inlet of the test box, and keeping the test box sealed; a temperature and humidity acceleration condition preparation step: setting a temperature setting threshold, a humidity setting threshold, and a pressure setting threshold, controlling the heating plate to start heating and the air supply component to start ventilation until the temperature, humidity, and pressure reach the set threshold and are maintained; a blue light acceleration condition preparation step: Select a light source corresponding to the luminous wavelength and light power density that matches the sample to be tested; gas atmosphere acceleration condition preparation step: select the type of atmosphere gas and set the target content, control the selected atmosphere gas to ventilate the test box, and after the atmosphere gas content reaches the target content, maintain the atmosphere gas at the target content through pressure relief and flow adjustment; sample optical parameter monitoring step: start the light source, make the light source emit light to illuminate the sample to be tested, measure the light emitted by the sample to be tested after being excited by blue light through a photoelectric detector, and record the optical parameters after processing; wherein the optical parameters include at least one or more of spectrum, quantum yield, brightness, and CIE color coordinates.

[0017] The quantum dot stability rapid testing device and method of the embodiment of the present invention can achieve a high temperature and high pressure test environment by setting temperature, humidity, pressure and heating and pressurizing, increase the saturated vapor pressure and boiling point of water, and thus increase the temperature and absolute humidity of the aging test; it can also excite the quantum dot sample by emitting blue light from a light source to the sample to be tested, and can also achieve the gas atmosphere in the test environment by introducing gas into the test box, so that the severity of the aging test conditions can be improved in many aspects by increasing the aging test temperature, absolute humidity, blue light power density and gas atmosphere, and the aging test can be accelerated, thereby greatly shortening the aging test cycle, and the aging cycle can be shortened to less than 1 day. At the same time, the optical parameters of the sample during the aging test of the test device can be monitored and recorded in real time, and the test results are more accurate, so that the stability of the quantum dot product can be judged more timely and accurately, which is helpful to provide help and guidance for the next experiment, research or product production of the quantum dot product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 Schematic diagram of the structure of an integrated quantum dot stability rapid testing device according to an embodiment of the present invention.

[0020] Reference numerals: 1. Test box; 2. Sample to be tested; 3. Sample holder; 4. Heating plate; 5. Water; 6. External light source; 7. Transparent window; 8. Light propagation path; 9. Temperature sensor; 10. Humidity sensor; 11. Photoelectric detector; 12. Pressure sensor; 13. Gas content detector; 14. Connecting line; 15. Control system; 16. First gas tank; 17. Second gas tank; 18. Third gas tank; 19. Gas supply pipeline; 20. Pressure relief port. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited to the basic implementation disclosed below.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0023] Before describing the quantum dot stability testing device and testing method according to the embodiment of the present invention, the technical idea of ​​the present invention is first described: The humidity used in the traditional aging test method is relative humidity, and the calculation formula is as follows: Relative humidity = (actual water vapor pressure / water saturated vapor pressure at the temperature) × 100% (1) However, what is really related to the quantum dot sample aging acceleration factor is the absolute humidity, which is calculated as follows: Absolute humidity = water vapor mass / air volume (2) In other words, the higher the water vapor content in the air, the more obvious the aging effect on quantum dots. Therefore, to further increase the severity of aging conditions, it is necessary to further increase the absolute humidity of the test environment where the quantum dot samples are located. However, when the relative humidity is close to the saturation value, the conventional method can only increase the absolute humidity by increasing the temperature and the saturated vapor pressure of water (for example, from 6090 test to double 85 test). However, due to the boiling point of water (100°C), more stringent aging test conditions cannot be achieved, so the aging test cycle cannot be further reduced.

[0024] In response to the problem, the present invention changes the test environment and increases the saturated vapor pressure and boiling point of water through a high-pressure environment, which can correspondingly increase the temperature of the test environment. It can also increase the absolute humidity of the test environment, and utilize the high-pressure and high-temperature test environment to achieve more stringent aging test conditions, thereby effectively reducing the test cycle of quantum dot samples. Embodiment 1

[0025] like Figure 1 As shown, the quantum dot stability rapid test device of the first embodiment of the present invention includes a test box, a sample holder, a light source, an air supply component, a test environment monitoring component, a sample detection component and a control and processing system. In this embodiment, the sample to be tested can be a quantum dot material or a related quantum dot film, a quantum dot diffusion plate and other quantum dot products.

[0026] The test box is a sealed box with a water tank at the bottom of the box. The water tank contains water. A heating plate is arranged at the bottom of the water tank. The heating plate can be composed of a thermal resistor heating element, which is used to heat the water in the water tank, so that water vapor can be generated in the test box to create a high temperature and high humidity test environment. The test box body can be provided with a feed door and a water inlet (not shown in the figure), and the water inlet can be integrated with the feed door. Since the test device of the present invention needs to set up a high temperature and high pressure test environment, it is necessary to ensure that the test box has a high material strength. It can be made of materials such as stainless steel and tempered glass, which can meet the material strength required for the test and have a low cost.

[0027] The sample holder is arranged in the test box for placing the sample to be tested. The sample holder may include a support rod and a support plate. The support rod is arranged vertically, and the bottom is installed at the bottom of the box body (which may be in the water tank), and the support plate is connected to the top of the support rod. The connection between the bottom side of the support plate and the top of the support rod is preferably a rotatable connection, so as to adjust the angle of the support plate, so that the angle of the sample to be tested placed on the support plate can be adjusted.

[0028] The light emitting angle of the light source is toward the sample to be tested on the sample holder, and the light emitted by the light source can be irradiated onto the sample to be tested. Here, the light source can be a blue light source, which can be composed of one or more blue light sources, and can include one or more blue light sources. Multiple blue light sources can also be arranged in a variety of combinations and light distribution curves. In this embodiment, the light source is an external light source, which is arranged outside the test box. On the one hand, the blue light can adjust the degree of accelerated aging by adjusting the blue light luminous power density. On the other hand, the blue light source is arranged outside the test box to avoid being affected by the aging environment, thereby reducing interference with the experimental results and reducing the energy and cost consumed by calibration. A transparent window is provided on the test box corresponding to the light propagation path where the external light source emits light to the sample to be tested. The external light source, the transparent window and the sample to be tested are located in a straight line. The light emitted by the external light source can irradiate the sample to be tested after passing through the transparent window. Here, the transparent window can be made of materials with high strength and good light transmittance such as glass, borosilicate, quartz, diamond, etc. The window diameter can also be reduced and the thickness increased to improve the window's ability to withstand high temperature and high pressure to meet the requirements of the test environment.

[0029] The gas supply assembly is connected to the test box through a gas supply pipeline, and is used to supply gas to the test box. The gas supply assembly includes multiple gas tanks that are respectively connected to the test box, such as the first gas tank 16, the second gas tank 17, and the third gas tank 18 shown in the figure. The multiple gas tanks store different types of gases, which may include oxygen, nitrogen, argon, helium and other gases, and are used to create a test environment containing atmospheric gas in the test box; air may also be included to create a high-pressure environment in the test box.

[0030] The test environment monitoring component includes a temperature sensor, a humidity sensor and a pressure sensor arranged in the test box. The temperature sensor is used to detect the temperature information in the test box, the humidity sensor is used to detect the humidity information in the test box, and the pressure sensor is used to detect the pressure information in the test box. Among them, the temperature sensor can be a thermistor temperature sensor, the humidity sensor can be a capacitive humidity sensor, and the pressure sensor can be a resistive strain type gas pressure sensor. In practical applications, the temperature sensor and the humidity sensor can be combined into one, for example, a capacitive temperature and humidity sensor is used.

[0031] The sample detection component includes a photodetector, which is arranged in a test box. The probe of the photodetector faces the sample to be tested and is located on the light propagation path of the reflected light after the light source shines on the sample to be tested. It is used to detect the light emitted by the quantum dot sample after being excited by blue light to obtain the corresponding optical parameters.

[0032] The control and processing system includes a controller and a processor. The controller is electrically connected to the heating plate, the air supply assembly, the temperature sensor, the humidity sensor and the pressure sensor through connecting lines, and is used to control the start and stop of the heating plate and the heating power according to the temperature and humidity information in the box detected by the temperature sensor and the humidity sensor, and to control the on and off and flow rate of the air supply pipeline according to the pressure information in the box detected by the pressure sensor, and to control the light source and the photodetector to start when the temperature in the box reaches the temperature setting threshold, the humidity reaches the humidity setting threshold, and the pressure reaches the pressure setting threshold; the processor is electrically connected to the photodetector through the connecting line to obtain the luminescence information of the sample to be tested detected by the photodetector, and obtain the optical parameters of the sample to be tested. Among them, the processor may include instruments such as a spectrometer, a brightness meter, and a colorimeter, which are connected to the rear end of the photodetector to obtain the optical parameters of the quantum dot sample such as the spectrum, the two-word yield, the brightness, and the CIE color coordinates.

[0033] The quantum dot stability rapid test device of this embodiment can improve the sample aging test conditions, accelerate the sample aging test, and reduce the aging test cycle through three aspects: temperature and humidity accelerated aging test conditions, blue light accelerated aging test conditions, and gas atmosphere accelerated aging test conditions.

[0034] Among them, regarding the temperature and humidity accelerated aging test conditions, a higher pressure setting threshold can be set so that a high-pressure test environment can be achieved in the test box. Since the saturated vapor pressure and boiling point of water in a high-pressure environment can be greatly increased, the temperature in the test box can be further greatly increased. The set temperature setting threshold only needs to be slightly lower than the boiling point of water under the atmospheric pressure. The substantial increase in saturated vapor pressure also means that the water vapor content in the test box can be further increased, that is, the absolute humidity in the test environment can be greatly increased. Therefore, the embodiment of the present invention creates a high-temperature and high-pressure test environment in the test box by setting temperature, humidity, and pressure thresholds, thereby creating more stringent aging test conditions and being able to greatly accelerate aging test experiments.

[0035] In an optional embodiment, the temperature setting threshold ranges from -273 to 2000°C, preferably from 20 to 400°C; the humidity setting threshold ranges from 0 to 100%, preferably from 50 to 95%; the pressure setting threshold ranges from 10 9 ~10 9 Pa, preferably 10 5 ~5×10 7 Pa. Different temperatures and humidity (relative humidity, not more than 100%) can be set in advance for multiple aging tests to determine the temperature and humidity setting values ​​with the best acceleration effect for aging tests on different quantum dot materials. In the test preparation stage, the aging test temperature and relative humidity to be heated are set according to the type of quantum dot sample to be measured, and then the target absolute humidity is set according to the relationship between the saturated vapor pressure of water at different pressures and temperatures. The target pressure value is calculated and set according to the above formulas (1) and (2), and then heating and pressurization (air is introduced) can be started. During the heating and pressurization process, the temperature sensor, humidity sensor and pressure sensor monitor the temperature, humidity and pressure changes in the test box in real time. As heating and pressurization proceed, the boiling point and saturated vapor pressure of water continue to increase, and water will only evaporate but not boil. The absolute humidity of the environment in the test box will also increase accordingly. When the temperature, pressure and relative humidity reach the set threshold, the stability test of the quantum dot sample is carried out by keeping warm, maintaining the water vapor pressure and air pressure, so that the test box is always kept under the set accelerated aging conditions.

[0036] Regarding the blue light accelerated aging test conditions, the blue light emitted by an external light source can be used to excite the sample to be tested to achieve a blue light test environment, accelerate the aging test, and reduce the aging test cycle; and the blue light accelerated aging efficiency can be further improved by adjusting the light power density of the external light source irradiating the sample to be tested. Here, the test device of the embodiment of the present invention can be used in advance to select light sources of different types and light power densities for aging test, so as to obtain the corresponding acceleration effect and determine the light source type and light power density with the best acceleration effect. Of course, the light source is not limited to a blue light source, but can also be an ultraviolet light source, a red light source, etc.

[0037] In an optional embodiment, the main wavelength of the light source is in the range of 300-800 nm, and preferably in the range of 400-480 nm; the light power density of the light irradiated to the quantum dot sample is in the range of 0-10 6 W / cm 2 , 0.001~1000W / cm 2 . Optionally, the light source includes a plurality of spare light sources that can emit different types of light, and / or the light power density of the light source is adjustable. In the test preparation stage, the required type of light source can be selected, and the light power density can be adjusted to the target power density by adjusting the electric power applied to the light source. After the temperature and humidity reach the target value, the light source can be turned on to start the blue light accelerated aging test. Here, the sample to be tested is not placed when the light source is adjusted to avoid aging and damage to the quantum dots during the light source adjustment process, which will cause errors in the test results.

[0038] Regarding the gas atmosphere accelerated aging test conditions, one or more atmosphere gases can be introduced into the test box through the gas supply device to generate a gas atmosphere test environment in the test box. Compared with the ordinary air environment of the traditional stability test method, the aging of the quantum dot sample can be accelerated to achieve the acceleration of the aging test. Here, the test device of the embodiment of the present invention can be used in advance to introduce a single gas into the test box for aging test, so as to obtain the influence and degree of influence of the gas on the aging test, and further determine the gas dosage range that can obtain the best acceleration effect by controlling the amount of gas introduced.

[0039] In an optional embodiment, the proportion of gas in the total gas volume ranges from 0 to 100%, preferably 20 to 80%. In the experimental preparation stage, the gas to be introduced is selected and the target gas content is set, and the control system controls the gas tank of the gas supply device to introduce gas into the test box. Optionally, a flow regulating valve is provided on the gas supply pipeline connected to the test box by each gas tank, and the control system is also electrically connected to the flow regulating valve for controlling the gas flow entering the test box. The test environment monitoring component also includes a gas content detector, which is arranged in the test box; the control system is also electrically connected to the gas content detector, which is used to control the ventilation flow of the corresponding gas supply pipeline according to the content information of the specified gas in the box detected by the gas content detector. A pressure relief port is provided on the box body of the test box, and a pressure relief valve is provided in the pressure relief port, and the control system is also electrically connected to the pressure relief valve. The control system can control the amount of gas introduced by controlling the valve opening of the flow control valve according to the gas content information detected by the gas content detector, so that the gas content gradually reaches the target gas content; and can stabilize the introduced gas content at the target value by controlling the pressure relief valve and the flow control valve. It should be noted that the preparation of the temperature and humidity accelerated aging test conditions and the preparation of the gas atmosphere accelerated aging test conditions can be carried out simultaneously, so that the gas content in the test box is stabilized at the target value, and the pressure in the test box is also stabilized at the set pressure value.

[0040] Compared with the existing quantum dot product aging test devices and methods, the quantum dot stability rapid test device of the embodiment of the present invention can greatly improve the aging test temperature and absolute humidity by providing a high temperature and high pressure test environment, and also improves the blue light power density and gas atmosphere of the test environment. The severity of the aging test conditions can be improved through four aspects, thereby greatly shortening the aging test cycle, and the aging cycle can be shortened to less than 1 day; at the same time, the optical parameters of the sample during the aging test can be monitored and recorded in real time, and the test results are more accurate, so that the stability of the quantum dot product can be judged more timely and accurately, which is helpful to provide assistance and guidance for the next step of experiment, research or product production of quantum dot products.

[0041] In actual application scenarios, the test box, heating plate, sensor, light source, photodetector and other components in the quantum dot stability rapid testing device of the embodiment of the present invention can be designed according to actual conditions such as aging test requirements, or equipment with corresponding functions in the prior art can be used.

[0042] Furthermore, other devices or components may be provided in the quantum dot stability rapid test device, or the actual setting positions of the devices or components may be adjusted to realize the practical application or other functions of the quantum dot stability rapid test device. For example, the control system may also include a manual interaction device to facilitate the user to set test parameters such as temperature, humidity, and air pressure, and to facilitate the user to control the start and various test steps of the aging test. Embodiment 2

[0043] This embodiment provides a method for rapid testing of quantum dot stability. The method uses the rapid testing device for quantum dot stability of the first embodiment to perform testing, and includes the following steps: Sample preparation steps: Place the sample to be tested on the sample holder in the test box, add a set amount of water to the water tank, close the sample inlet of the test box, and keep the test box sealed.

[0044] Preparation steps for temperature and humidity acceleration conditions: set the temperature setting threshold, humidity setting threshold, and pressure setting threshold, control the heating plate to start heating, and the air supply component to start ventilation until the temperature, humidity, and pressure reach the set threshold and are maintained.

[0045] Preparation steps for blue light acceleration conditions: Select a light source that matches the luminous wavelength and light power density of the sample to be tested.

[0046] Preparation steps for gas atmosphere acceleration conditions: select the type of atmosphere gas and set the target content, control the ventilation of the selected atmosphere gas to the test chamber, and after the atmosphere gas content reaches the target content, maintain the atmosphere gas at the target content through pressure relief and flow adjustment.

[0047] The steps of monitoring the optical parameters of the samples are as follows: starting the light source, making the light source emit light to illuminate the sample to be tested, measuring the light emitted by the sample to be tested after being excited by blue light through the photodetector, and recording the optical parameters after processing; wherein the optical parameters include at least one or more of spectrum, quantum yield, brightness, and CIE color coordinates.

[0048] The quantum dot stability rapid testing method of this embodiment is based on the quantum dot stability rapid testing device of the above-mentioned embodiment 1 as the execution body and has corresponding beneficial effects, which will not be described in detail here.

[0049] It should be pointed out that, according to the needs of implementation, the various components / steps described in the embodiments of the present invention may be split into more components / steps, or two or more components / steps or parts of components / steps may be combined into new components / steps to achieve the purpose of the embodiments of the present invention.

[0050] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A quantum dot stability rapid testing device, characterized in that: include: The test box is sealed, with a water tank at the bottom, the water tank is filled with water, and a heating plate is arranged at the bottom of the water tank; A sample holder, arranged in the test chamber; A light source, which emits light to illuminate the sample to be tested on the sample holder; A gas supply assembly, connected to the test box through a gas supply pipeline, and used for supplying gas to the test box; A test environment monitoring component, including a temperature sensor, a humidity sensor, and a pressure sensor disposed in the test chamber; A sample detection assembly, including a photoelectric detector, is disposed in the test chamber; The control and processing system is electrically connected to the heating plate, the air supply assembly, the temperature sensor, the humidity sensor and the pressure sensor, respectively, and is used to control the start and stop of the heating plate and the heating power according to the temperature and humidity information in the box detected by the temperature sensor and the humidity sensor, and to control the on-off and flow rate of the air supply pipeline according to the pressure information in the box detected by the pressure sensor, and to control the light source and the photoelectric detector to start when the temperature in the box reaches the temperature setting threshold, the humidity reaches the humidity setting threshold, and the pressure reaches the pressure setting threshold; it is also electrically connected to the photoelectric detector to obtain the luminescence information of the sample to be tested detected by the photoelectric detector, and obtain the optical parameters of the sample to be tested.

2. A quantum dot stability rapid testing device according to claim 1, characterized in that: The gas supply assembly includes a plurality of gas cylinders respectively connected to the test box, and different types of gases are respectively stored in the plurality of gas cylinders.

3. A quantum dot stability rapid testing device according to claim 2, characterized in that: A flow regulating valve is arranged on the gas supply pipeline connecting the gas tank and the test box, and the control system is also electrically connected to the flow regulating valve for controlling the gas flow entering the test box.

4. A quantum dot stability rapid testing device according to claim 3, characterized in that: The test environment monitoring component also includes a gas content detector, which is arranged in the test box; the control system is also electrically connected to the gas content detector, and is used to control the ventilation flow of the corresponding gas supply pipeline according to the content information of the specified gas in the box detected by the gas content detector.

5. A quantum dot stability rapid testing device according to claim 1, characterized in that: The light source is an external light source arranged outside the test box, and a transparent window is arranged on the test box at a location corresponding to the path where the external light source illuminates the sample to be tested.

6. A quantum dot stability rapid testing device according to claim 1, characterized in that: The light source includes a plurality of spare light sources capable of emitting different types of light, and / or the light power density of the light source is adjustable.

7. A quantum dot stability rapid testing device according to claim 6, characterized in that: The main wavelength of the light source is in the range of 400-480nm, and the light power density of the light irradiated to the quantum dot sample is in the range of 0.001-1000W / cm 2 .

8. A quantum dot stability rapid testing device according to claim 1, characterized in that: A pressure relief port is provided on the box body of the test box, a pressure relief valve is arranged in the pressure relief port, and the control system is also electrically connected to the pressure relief valve.

9. A quantum dot stability rapid testing device according to claim 1, characterized in that: The temperature setting threshold ranges from 20 to 400°C, the humidity setting threshold ranges from 50 to 95%, and the pressure setting threshold ranges from 10 5 ~5×10 7 Pa.

10. A method for rapid testing of quantum dot stability, characterized in that: The method adopts the quantum dot stability rapid testing device according to any one of claims 1 to 8 for testing, comprising the following steps: Sample preparation steps: Place the sample to be tested on the sample holder in the test box, add a set amount of water to the water tank, close the sample inlet of the test box, and keep the test box sealed; Temperature and humidity acceleration condition preparation steps: set the temperature setting threshold, humidity setting threshold, and pressure setting threshold, control the heating plate to start heating, and the air supply component to start ventilation until the temperature, humidity, and pressure reach the set threshold and maintain; Preparation steps for blue light acceleration conditions: Select a light source that matches the sample to be tested with a luminous wavelength and light power density; Gas atmosphere acceleration condition preparation steps: select the type of atmosphere gas and set the target content, control the selected atmosphere gas to ventilate the test chamber, and after the atmosphere gas content reaches the target content, maintain the atmosphere gas at the target content through pressure relief and flow adjustment; The steps of monitoring the optical parameters of the samples are as follows: starting the light source, making the light source emit light to illuminate the sample to be tested, measuring the light emitted by the sample to be tested after being excited by blue light through the photodetector, and recording the optical parameters after processing; wherein the optical parameters include at least one or more of spectrum, quantum yield, brightness, and CIE color coordinates.

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