Method and device for activating performance of cadmium telluride power generation glass

Abstract

The invention discloses a method and a device for activating the performance of cadmium telluride power generation glass, relates to the technical field of preparation of cadmium telluride power generation glass, and solves the problems that the existing performance activation method is long in time, incomplete in performance activation and difficult to control, and the product is damaged by parameters in the process. The method comprises the following steps: S1, taking a product needing to be activated, controlling the temperature to a first preset temperature, and carrying out dark-state thermal activation; s2, heating the product obtained in the step S1 to a second preset temperature, keeping the constant temperature, and sequentially carrying out first-stage light activation and electron activation; s3, heating the product obtained in S2 to a third preset temperature, keeping the constant temperature, and sequentially carrying out second-stage light activation and electron activation; s4, cooling the product obtained in S3 to a second preset temperature; keeping constant temperature and sequentially carrying out third-stage light activation and electron activation; and S5, cooling the product obtained in the step S4 to a fourth preset temperature, and completing performance activation. The invention further provides a device based on the method.

Description

Technical Field

[0001] The invention relates to the technical field of cadmium telluride power generation glass preparation, in particular to a method and device for activating the performance of cadmium telluride power generation glass. Background Art

[0002] With the booming development of the photovoltaic BIPV market, cadmium telluride power generation glass has been widely favored in photovoltaic building integration applications due to its excellent low temperature coefficient, weak light power generation performance, product plasticity and high compatibility with buildings. However, due to its material characteristics, cadmium telluride photovoltaic devices will have certain dark-induced attenuation and light-induced attenuation. It is necessary to perform a performance activation process on cadmium telluride power generation glass photovoltaic devices to achieve their optimal power generation performance.

[0003] Moreover, due to the particularity of its devices, cadmium telluride power generation glass has different performance activation requirements from other photovoltaic devices such as crystalline silicon, heterojunction, perovskite, copper indium gallium selenide, etc. There is currently no short-term performance activation method specifically for cadmium telluride power generation glass. The existing performance activation methods are: visible light illumination activation or high-temperature power-on method. When using light aging equipment for visible light activation, the photovoltaic device is placed in a single chamber, the light source and the product are in the same space, and the sunlight is simulated to illuminate the power generation glass. Through pre-treatment of up to 40 hours of illumination (limited to 1000 watts / square meter of light intensity, 40 hours), the electrical performance of cadmium telluride power generation glass reaches 80% of the optimal performance.

[0004] However, visible light activation or high temperature power-on has the following disadvantages:

[0005] (1) The overall process time is long. A single product needs an average of 40 hours of light exposure (limited to 1000 watts / square meter light intensity for 40 hours) to be activated, which cannot meet the requirements of online real-time monitoring. The method of the present invention uses a light source of a specific wavelength in combination with a specific light intensity, a specific electron activation amount and a specific temperature field environment. It only takes 10 minutes of process time to meet the activation process requirements, greatly reducing the process time.

[0006] (2) The wavelength of the light activation spectrum is not differentiated, and the performance of the cadmium telluride power generation glass cannot be activated efficiently.

[0007] (3) The product is kept at a relatively high temperature for a long time, between 80℃ and 300℃. At this temperature, irreversible damage will be caused to the product. High temperature will cause deformation, aging, and hidden cracks in the power generation film layer, adhesive bonding layer, and glass. At the same time, it will also cause energy waste.

[0008] (4) The temperature control of the product is poor. In the entire light activation area, the light source and the product are in the same space, and the temperature of the product cannot be controlled, resulting in insufficient uniformity of the light activation effect.

[0009] (5) Traditional xenon lamps, metal-bonded lamps, halogen lamps or outdoor light sources are used for light activation. However, these light sources have low luminous efficiency and convert a large amount of energy into heat energy. While consuming energy, they also have a negative impact on the product because they cannot isolate the spectrum.

[0010] (6) Simply activating the cadmium telluride glass with visible light or applying electricity at high temperature cannot fully activate the performance of the glass, and can only achieve 80% of its performance. Summary of the invention

[0011] The purpose of the present invention is to solve the problems in the prior art that the performance activation method takes a long time, the performance activation is incomplete, and it is difficult to control the parameters in the process, which damages the product. The present invention provides a method for activating the performance of cadmium telluride power generation glass by correspondingly matching light activation, dark heat activation, electron activation, and specific ambient temperature, so as to achieve the effect of efficiently activating the performance of cadmium telluride power generation glass. The method can activate 95% of the full performance of cadmium telluride power generation glass, and has extremely strong superiority.

[0012] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0013] In a first aspect, the present invention provides a method for activating the performance of cadmium telluride power generation glass, the method comprising the following steps:

[0014] S1, taking the product to be activated and controlling the temperature to a first preset temperature for dark heat activation;

[0015] S2, heating the product obtained in S1 to a second preset temperature, maintaining the constant temperature and sequentially performing the first stage of light activation and electronic activation;

[0016] S3, heating the product obtained in S2 to a third preset temperature, maintaining the constant temperature and sequentially performing the second stage of light activation and electronic activation;

[0017] S4, cooling the product obtained in S3 to a second preset temperature; maintaining the constant temperature and sequentially performing the third stage of light activation and electronic activation;

[0018] S5. Cooling the product obtained in S4 to a fourth preset temperature to complete performance activation.

[0019] Furthermore, the first preset temperature is 50-60°C.

[0020] Furthermore, the second preset temperature is 70-75°C.

[0021] Furthermore, the third preset temperature is 75-80°C.

[0022] Furthermore, the fourth preset temperature is 25°C.

[0023] Furthermore, in S1, the dark state thermal activation time is 170 to 185 seconds.

[0024] Furthermore, in S2, the light activation of the first stage is specifically to use a light source in the 300-500 nanometer band and irradiate with a light intensity of 1300-1500 W / ㎡; the electronically activated constant current source of the first stage outputs a current activation of 1.5-2.5 times the short-circuit current of the product, and the activation process is performed for 175-185 seconds.

[0025] Furthermore, in S3, the light activation of the second stage is specifically to use a 500-800 nanometer band light source and irradiate with a light intensity of 1800-2000W / ㎡; the electronically activated constant current source of the second stage outputs a current activation of 2-3 times the short-circuit current of the product, and the activation process is performed for 55-65 seconds.

[0026] Furthermore, in S4, the light activation in the third stage is specifically to use a light source in the 800-1000 nanometer band and irradiate with a light intensity of 1300-1500 W / ㎡; the electronically activated constant current source in the second stage outputs a current activation of 1.5-2.5 times the short-circuit current of the product, and the activation process is performed for 175-185 seconds.

[0027] In a second aspect, the present invention also provides a device based on the above-mentioned method for activating the performance of cadmium telluride power generation glass, the device comprising a first preheating chamber, a second preheating chamber, a first constant temperature reaction chamber, a third preheating chamber, a second constant temperature reaction chamber, a first cooling chamber, a third constant temperature reaction chamber and a second cooling chamber connected in sequence; the first constant temperature reaction chamber, the second constant temperature reaction chamber and the third constant temperature reaction chamber comprise mutually isolated and temperature-independently controlled lamp rooms and a constant temperature chamber arranged below the lamp room, and a light-transmitting, vacuum, light-transmitting and heat-insulating module is arranged between the lamp room and the constant temperature chamber.

[0028] Compared with the prior art, the advantages of the present invention are:

[0029] 1. The present invention relates to a method for activating the performance of cadmium telluride power generation glass. The method of the present invention adopts a specific light source wavelength and a specific temperature field environment, and the overall process time is greatly shortened to about 10 minutes; and a three-segment band light source S2, S3 and S4 is set, which are a combination of spectral light sources with three different wavelengths of 300-500 nanometers, 500-800 nanometers, and 800-1000 nanometers, respectively, so as to complete the performance activation process efficiently and energy-savingly.

[0030] At the same time, in the whole process of this method, a low temperature activation process is adopted, and the temperature of the product is always between 50°C and 80°C. Such a temperature range can well protect the reliability of the product. It also saves energy and reduces costs to a certain extent.

[0031] In addition, the method of the present invention matches dark-state thermal activation, light activation, electronic activation, specific ambient temperature and time accordingly, thereby achieving a linkage effect of efficiently activating the performance of cadmium telluride power generation glass. The various steps are combined and coordinated with each other to achieve excellent results and can activate 95% of the full performance of the product.

[0032] The method of the present invention adopts the mutual coordination of specific light source wavelength, specific irradiation intensity, specific electron activation, and specific temperature field environment to achieve optimal process conditions, reducing the overall process time from 40 hours to 10 minutes, and improving the performance activation effect from 80% of the original full performance to 95% of the full performance.

[0033] Furthermore, in order to be suitable for the characteristics of cadmium telluride power generation glass, the method of the present invention sets a dark state heat activation process in step S1, which further improves the effect of activating the electrical properties of the cadmium telluride power generation glass.

[0034] 2. A device involved in the present invention, through the first preheating chamber, the second preheating chamber, the first constant temperature reaction chamber, the third preheating chamber, the second constant temperature reaction chamber, the first cooling chamber, the third constant temperature reaction chamber and the second cooling chamber connected in sequence, can make the device reasonably cooperate with the above-mentioned process, firstly perform dark state thermal activation treatment on the power generation glass, and then isolate the light sources of different wavelengths and the constant current sources of different currents respectively to form three activation chambers.

[0035] The three activation chambers are equipped with three different process temperature controlled constant temperature chambers (the first constant temperature reaction chamber, the second constant temperature reaction chamber and the third constant temperature reaction chamber) and lamp chambers. The three constant temperature chambers are isolated separately to maintain their own temperatures. The first constant temperature reaction chamber, the second constant temperature reaction chamber and the third constant temperature reaction chamber all include lamp chambers and constant temperature chambers, and the lamp chambers and constant temperature chambers are also relatively isolated using a temperature insulation and light transmission module to ensure that the temperatures of the lamp chambers and the constant temperature chambers are independent of each other, and also ensure the temperature uniformity of the products in the constant temperature chambers.

[0036] The device of the present invention adopts a design of dividing the light source area and the product area, uses a light-transmitting and heat-insulating module to isolate the two areas, and independently controls and adjusts the temperature of the two areas, thereby improving the uniformity of performance activation. This not only ensures the uniformity of the performance activation effect, but also meets the requirements of energy conservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of a method for activating the performance of cadmium telluride power generation glass provided in an embodiment of the present invention.

[0038] Figure 2 A schematic diagram of a device provided in the embodiment of the present invention Figure 1 .

[0039] Figure 3 A schematic diagram of the structure of a first preheating chamber, a second preheating chamber, a third preheating chamber, a first cooling chamber and a second cooling chamber of a device provided in an embodiment of the present invention.

[0040] Figure 4 A schematic diagram of the structure of a first constant temperature reaction chamber, a second constant temperature reaction chamber and a third constant temperature reaction chamber of a device provided in an embodiment of the present invention.

[0041] Figure 5 This is a schematic diagram of the lamp chamber structure of a device provided in an embodiment of the present invention.

[0042] Figure 6 This is a schematic diagram of the constant temperature chamber structure of a device provided in an embodiment of the present invention.

[0043] Figure 7 This is a schematic diagram of the structure of an electronic activation system of a device provided in an embodiment of the present invention.

[0044] Figure 8 A schematic diagram of a device provided in the embodiment of the present invention Figure 2 .

[0045] Fig. 9 This is a schematic diagram of the external quantum efficiency of cadmium telluride power generation glass in Experimental Example 2 of the present invention specification.

[0046] Fig.10 This is a graph showing the results of measuring the light-induced attenuation rate in Experimental Example 2 of the present invention.

[0047] Figure annotation:

[0048] Figure 2 : Product of cadmium telluride power generation glass-16; first preheating chamber-①; chamber valve one-12; second preheating chamber-②; first constant temperature reaction chamber-③; first lamp room-④; chamber valve two-13; third preheating chamber-⑤; second constant temperature reaction chamber-⑥; second lamp room-⑦; chamber valve three-14; second lamp room-⑦; first cooling chamber-⑧; third constant temperature reaction chamber-⑨; third lamp room-⑩; chamber valve four-15; third lamp room⑩; second cooling chamber-11.

[0049] Figure 3 :Ceramic transmission roller-①; bearing-②; transmission gear-③; transmission motor-④; insulation shell-⑤; heating module-⑥; inlet and outlet air ducts-⑦; temperature control box-⑧.

[0050] Figure 5 : Transparent and heat-insulating module-①; double-layer quartz plate-②; spacer-③; vacuum pump-④; light source-⑤; filter plate-⑥; temperature control box-⑦.

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0052] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. DETAILED DESCRIPTION

[0053] In a first aspect, the present invention provides a method for activating the performance of cadmium telluride power generation glass, the method comprising the following steps:

[0054] S1, taking the product to be activated and controlling the temperature to a first preset temperature for dark heat activation;

[0055] S2, heating the product obtained in S1 to a second preset temperature, maintaining the constant temperature and sequentially performing the first stage of light activation and electronic activation;

[0056] S3, heating the product obtained in S2 to a third preset temperature, maintaining the constant temperature and sequentially performing the second stage of light activation and electronic activation;

[0057] S4, cooling the product obtained in S3 to a second preset temperature; maintaining the constant temperature and sequentially performing the third stage of light activation and electronic activation;

[0058] S5. Cooling the product obtained in S4 to a fourth preset temperature to complete performance activation.

[0059] It can be understood that the method of the present invention adopts a specific light source wavelength and a specific temperature field environment, and the overall process time is greatly shortened to about 10 minutes; and a three-section band light source S2, S3 and S4 is set, which is a spectral light source combination of 300-500 nanometers, 500-800 nanometers, and 800-1000 nanometers, respectively, to complete the performance activation process efficiently and energy-savingly.

[0060] At the same time, in the whole process of this method, a low temperature activation process is adopted, and the temperature of the product is always between 50°C and 80°C. Such a temperature range can well protect the reliability of the product. It also saves energy and reduces costs to a certain extent.

[0061] In addition, the method of the present invention matches dark-state thermal activation, light activation, electronic activation, specific ambient temperature and time accordingly, thereby achieving a linkage effect of efficiently activating the performance of cadmium telluride power generation glass. The various steps are combined and coordinated with each other to achieve excellent results and can activate 95% of the full performance of the product.

[0062] The method of the present invention uses the mutual cooperation of specific light source wavelength, specific irradiation intensity, specific electron activation, and specific temperature field environment to achieve the best process conditions, reducing the overall process time from 40 hours to 10 minutes, and improving the performance activation effect from 80% of the original full performance to 95% of the full performance. In addition, in order to be suitable for the characteristics of cadmium telluride power generation glass, the method of the present invention sets a dark state heat activation process in step S1, further improving the effect of activating the electrical performance of cadmium telluride power generation glass.

[0063] In some embodiments of the present invention, the first preset temperature is 50-60°C.

[0064] In some embodiments of the present invention, the second preset temperature is 70-75°C.

[0065] In some embodiments of the present invention, the third preset temperature is 75-80°C.

[0066] In some embodiments of the present invention, the fourth preset temperature is 25°C.

[0067] In some embodiments of the present invention, in S1, the dark state thermal activation time is 170 to 185 seconds.

[0068] In some embodiments of the present invention, in S2, the light activation of the first stage is specifically to use a light source in the 300-500 nanometer band and irradiate with a light intensity of 1300-1500 W / ㎡; the electronically activated constant current source in the first stage outputs a current activation of 1.5-2.5 times the short-circuit current of the product, and the activation process is performed for 175-185 seconds.

[0069] In some embodiments of the present invention, in S3, the light activation of the second stage is specifically to use a 500-800 nanometer band light source and irradiate with a light intensity of 1800-2000W / ㎡; the electronically activated constant current source of the second stage outputs a current activation of 2-3 times the short-circuit current of the product, and the activation process is performed for 55-65 seconds.

[0070] In some embodiments of the present invention, in S4, the light activation in the third stage is specifically to use a light source in the 800-1000 nanometer band and irradiate with a light intensity of 1300-1500 W / ㎡; the electronically activated constant current source in the second stage outputs a current activation of 1.5-2.5 times the short-circuit current of the product, and the activation process is performed for 175-185 seconds.

[0071] In a second aspect, the present invention also provides a device based on the above-mentioned method for activating the performance of cadmium telluride power generation glass, see Figure 8 The device includes a first preheating chamber, a second preheating chamber, a first constant temperature reaction chamber, a third preheating chamber, a second constant temperature reaction chamber, a first cooling chamber, a third constant temperature reaction chamber and a second cooling chamber connected in sequence; the first constant temperature reaction chamber, the second constant temperature reaction chamber and the third constant temperature reaction chamber include mutually isolated and temperature-independently controlled lamp chambers and a constant temperature chamber arranged below the lamp chambers, and a light-transmitting, vacuum, light-transmitting and heat-insulating module is arranged between the lamp chambers and the constant temperature chambers.

[0072] It can be understood that the device involved in the present invention, through the first preheating chamber, the second preheating chamber, the first constant temperature reaction chamber, the third preheating chamber, the second constant temperature reaction chamber, the first cooling chamber, the third constant temperature reaction chamber and the second cooling chamber connected in sequence, can enable the device to reasonably cooperate with the above-mentioned process, firstly subject the power generation glass to dark state thermal activation treatment, and then isolate the light sources of different wavelengths and the constant current sources of different currents respectively, to form three activation chambers.

[0073] The three activation chambers are equipped with three different process temperature controlled constant temperature chambers (the first constant temperature reaction chamber, the second constant temperature reaction chamber and the third constant temperature reaction chamber) and lamp chambers. The three constant temperature chambers are isolated separately to maintain their own temperatures. The first constant temperature reaction chamber, the second constant temperature reaction chamber and the third constant temperature reaction chamber all include lamp chambers and constant temperature chambers, and the lamp chambers and constant temperature chambers are also relatively isolated using a temperature insulation and light transmission module to ensure that the temperatures of the lamp chambers and the constant temperature chambers are independent of each other, and also ensure the temperature uniformity of the products in the constant temperature chambers.

[0074] The device of the present invention adopts a design of dividing the light source area and the product area, uses a light-transmitting and heat-insulating module to isolate the two areas, and independently controls and adjusts the temperature of the two areas, thereby improving the uniformity of performance activation. This not only ensures the uniformity of the performance activation effect, but also meets the requirements of energy conservation.

[0075] In some embodiments of the present invention, the specific structure of the light-transmitting heat-insulating module is as follows: the module includes a double-layer hollow quartz plate arranged up and down, a plurality of spacers are arranged between the two layers of quartz plates, and a light-transmitting, vacuum area is arranged between the two layers of quartz plates. The temperature of the two chambers, the lamp chamber and the constant temperature chamber, is isolated so as to control the temperature separately.

[0076] Specifically, during operation, a vacuum pump is used to remove the air between the two layers of quartz plates, so that a light-transmitting, vacuum area is formed between the lamp room and the constant temperature chamber. Without blocking light, the light transmittance can reach more than 95%. As a result, the lamp room and the constant temperature chamber are well separated by the light-transmitting heat-insulating module, and the lamp room and the constant temperature chamber are temperature-controlled separately, with high activation uniformity and good energy saving.

[0077] In some embodiments of the present invention, a constant current source electronic activation system is provided in the constant temperature chamber, and electronic activation is performed simultaneously with light activation, thereby realizing a combination of dark state thermal activation, light activation, and electronic activation.

[0078] In some embodiments of the present invention, all light sources are LED light sources, which have high light efficiency and can save energy. At the same time, the combination of multiple LEDs can match light sources with different wavelengths.

[0079] Example 1

[0080] In this embodiment, a performance activation process is performed on a batch of cadmium telluride power generation glass. Please refer to Figure 1 and Figure 2 , the specific steps of the activation process are as follows:

[0081] See also Figure 2 In the first step, the cadmium telluride power generation glass product 16 to be activated is transferred into the first preheating chamber ①, the power generation glass is heated from room temperature to 50-60°C, and a thermal activation treatment is performed for 180 seconds in a dark state.

[0082] The second step is to open the chamber valve 12, transfer the cadmium telluride power generation glass 16 after the dark state heat activation treatment into the second preheating chamber ②, close the chamber valve 12, and heat the temperature of the cadmium telluride power generation glass to 70-75℃.

[0083] The third step is to transfer the cadmium telluride power generation glass 16 into the first constant temperature reaction chamber ③, so that the temperature of the power generation glass is maintained at 70-75°C, and at the same time, a light source with a wavelength of 300-500 nanometers is set in a lamp room ④, and irradiated with a light intensity of 1300W-1500W / ㎡.

[0084] Also refer to Figure 7 , turn on the electronic activation system, so that the positive pole of the constant current power supply in the electronic activation system is connected to the positive pole of the cadmium telluride power generation glass, and the negative pole of the constant current power supply in the electronic activation system is connected to the negative pole of the cadmium telluride power generation glass. The constant current source of the electronic activation system outputs a current activation of 1.5 to 2.5 times the short-circuit current of the product, and the activation process is carried out for 180 seconds.

[0085] Please continue reading Figure 2In the fourth step, the chamber valve 2 13 is opened to transfer the cadmium telluride power generation glass 16 processed in the first lamp chamber ④ into the third preheating chamber ⑤, and the chamber valve 2 13 is closed to heat the temperature of the power generation glass to 75-80°C.

[0086] The fifth step is to transfer the cadmium telluride power generation glass 16 into the second constant temperature reaction chamber ⑥, so that the temperature of the power generation glass is maintained at 75-80°C, control the light source in the second lamp room ⑦ to be in the 500-800 nanometer band, and irradiate with a light intensity of 1800W-2000W / ㎡.

[0087] At the same time, if Figure 7 , turn on the electronic activation system, the positive pole of the constant current power supply in the electronic activation system is connected to the positive pole of the cadmium telluride power generation glass, the negative pole of the constant current power supply in the electronic activation system is connected to the negative pole of the cadmium telluride power generation glass, the constant current source of the electronic activation system outputs a current activation of 2 to 3 times the short-circuit current of the product, and the activation process is carried out for 60 seconds.

[0088] Please continue reading Figure 2 In the sixth step, the chamber valve 3 14 is opened to transfer the cadmium telluride power generation glass 16 after the treatment in the second lamp chamber ⑦ into the first cooling chamber ⑧, and the chamber valve 3 14 is closed to reduce the temperature of the power generation glass to 70-75°C.

[0089] The seventh step is to transfer the cadmium telluride power generation glass 16 into the third constant temperature reaction chamber ⑨, keep the temperature of the power generation glass at 70-75°C, set a light source in the 800-1000 nanometer band in the three-lamp room ⑩, and irradiate it with a light intensity of 1300W-1500W / ㎡.

[0090] At the same time Figure 7 , turn on the electronic activation system, the positive pole of the constant current power supply in the electronic activation system is connected to the positive pole of the cadmium telluride power generation glass, the negative pole of the constant current power supply in the electronic activation system is connected to the negative pole of the cadmium telluride power generation glass, the constant current source of the electronic activation system outputs a current activation of 1.5 to 2.5 times the short-circuit current of the product, and the activation process is carried out for 180 seconds.

[0091] Please continue reading Figure 2 In the eighth step, the chamber valve 4 15 is opened, and the cadmium telluride power generation glass 16 after the treatment in the third lamp chamber ⑩ is transmitted into the second cooling chamber 11, and the temperature of the power generation glass is reduced to 25°C, completing the performance activation of the cadmium telluride power generation glass.

[0092] Example 2

[0093] In this embodiment, a device for activating the performance of cadmium telluride power generation glass based on embodiment 1 is provided. Figure 8The device includes a first preheating chamber, a second preheating chamber, a first constant temperature reaction chamber, a third preheating chamber, a second constant temperature reaction chamber, a first cooling chamber, a third constant temperature reaction chamber and a second cooling chamber which are connected in sequence.

[0094] Please refer to Figure 3 The structures of the first preheating chamber, the second preheating chamber, the third preheating chamber, the first cooling chamber and the second cooling chamber are as follows: the preheating chamber and the cooling chamber (the first preheating chamber, the second preheating chamber, the third preheating chamber, the first cooling chamber and the second cooling chamber) are all temperature-controlled chambers, the temperature-controlled chamber adopts a fully enclosed insulation layer design, and a transmission system, a heating system and a temperature control circulation system are arranged in the temperature-controlled chamber.

[0095] For the transmission system, please refer to Figure 3 , which consists of a ceramic transmission roller ①, a bearing ②, a transmission gear ③, and a transmission motor ④. It is used to carry and transmit cadmium telluride power generation glass. The ceramic transmission roller is inside the insulation shell ⑤ to ensure uniform temperature, and the other components are outside the insulation shell ⑤ to ensure that the components operate at room temperature.

[0096] Please continue reading Figure 3 The heating modules ⑥ are distributed on the four sides of the chamber to ensure the uniformity of the temperature in the chamber. The inlet and outlet air ducts ⑦ of the temperature control circulation system are located on both sides of the chamber and are distributed in a mesh shape. The temperature control box ⑧ contains temperature control modules and fan modules to ensure the uniformity of the circulating air volume and the temperature in the chamber.

[0097] See also Figure 4 , Figure 5 and Figure 6 , the structure of the process chamber (the first constant temperature reaction chamber, the second constant temperature reaction chamber and the third constant temperature reaction chamber) is: Figure 4 The overall structure of the process chamber is referenced by Figure 5 The lamp room and Figure 6 The constant temperature chamber adopts an isolation design.

[0098] See also Figure 5 , Figure 5 The lamp room and Figure 6 The constant temperature chamber is isolated by a light-transmitting heat-insulating module ①. This module adopts a double-layer quartz plate ② hollow design, and the two layers of quartz plates are supported by spacers ③. During operation, a vacuum pump ④ is used to extract the air between the quartz plates, so that a light-transmitting, vacuum area is formed between the lamp room and the constant temperature chamber. Without blocking the light (the light transmittance can reach more than 95%), the lamp room ( Figure 5 ) and constant temperature chamber ( Figure 6 ) The temperatures of the two chambers can be controlled separately.

[0099] Please continue reading Figure 5Four groups of light sources ⑤ are used in the lamp room to work, and a filter plate ⑥ is installed under the light source ⑤ to isolate unnecessary band light.

[0100] A temperature control box ⑦ is provided in the lamp room, and the air temperature in the lamp room is controlled by the temperature control box ⑦ to ensure the service life of the lamp.

[0101] Constant temperature chamber ( Figure 6 ) and the temperature control chamber (the first preheating chamber, the second preheating chamber, the third preheating chamber, the first cooling chamber and the second cooling chamber are all temperature control chambers) ( Figure 3 ) design is the same, but due to the light-transmitting and heat-insulating module ( Figure 5 -①) removes the original top heating and top insulation layers.

[0102] Test Example 1

[0103] 1.1 Experimental design

[0104] Four cadmium telluride power generation glass samples were taken. All four samples were made by the same process. The difference in original electrical properties of the four samples was less than 2%. The four samples were grouped in pairs and numbered sample 1, sample 2, sample 3, and sample 4.

[0105] 1.2 Test operation

[0106] Samples 1 and 2 were activated using the original visible light activation method.

[0107] Samples 3 and 4 were activated according to the method for activating electrical properties of the present invention.

[0108] The electrical properties of Sample 1, Sample 2, Sample 3 and Sample 4 were measured respectively, and the measurement items included: power, short-circuit current, open-circuit voltage, maximum operating current, maximum operating voltage, fill factor (%), photoelectric conversion efficiency (%) and activation efficiency (%).

[0109] 1.3 Test results

[0110] After measuring the electrical properties and calculating the statistics, Table 1 is obtained.

[0111] According to the contents of Table 1, the electrical performance of Samples 1 and 2 after the original visible light photoactivation treatment reaches about 79% to 80% of the full performance.

[0112] After being processed by the method for activating electrical properties of the present invention, the electrical properties of samples 3 and 4 reached 95% to 96% of the full performance. It can be seen that the process of the present invention has a better activation effect and has obvious advantages.

[0113]

[0114] Test Example 2

[0115] 2.1 Experimental design

[0116] Four cadmium telluride power generation glass samples were taken. The four samples were all made by the same process. The difference in original electrical properties of the four samples was less than 2%. The four samples were grouped in pairs and numbered as original technology sample 1, original technology sample 2, inventive technology sample 1, and inventive technology sample 2.

[0117] 2.2 Test operation

[0118] The original technical samples 1 and 2 were processed according to the original visible light activation method; the technical samples 1 and 2 of the present invention were processed according to the electrical property activation method of the present invention.

[0119] The light-induced decay rate of each sample was measured. Fig.10 .

[0120] 2.2 Test results

[0121] See also Fig.10 The products activated by the patent of this invention: Technical Sample 1 of this invention and Technical Sample 2 of this invention have significantly lower light-induced decay rates than the original samples in the later stage, and have stronger advantages.

[0122] In summary, referring to the spectrum of external quantum efficiency of cadmium telluride power generation glass ( Fig. 9 ), in the 300-500 nanometer band, 500-800 nanometer band, and 800-1000 nanometer band, the power generation glass shows different absorption conversion efficiencies. The existing technology only uses a fixed wavelength light source, fixed temperature, and fixed current for activation, and cannot perform targeted treatment of each wavelength on the cadmium telluride power generation glass, and there is no way to reduce the light-induced decay rate.

[0123] The present invention adopts light activation of light sources in different bands, matches different light intensities, temperatures, and electrical activation currents, and performs matching activation under multiple conditions (relationship formula: light source wavelength X external quantum efficiency X conversion constant = activation light intensity X activation current X activation time), to carry out targeted repair of the power generation glass, thereby achieving the effect of reducing the light-induced attenuation of cadmium telluride power generation glass.

[0124] The above embodiment is only one implementation of the present invention, and its description 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 modifications 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 based on the attached claims.

Claims

1. A method for activating the performance of cadmium telluride power generation glass, characterized in that: The method comprises the following steps: S1, taking the product to be activated and controlling the temperature to a first preset temperature for dark heat activation; S2, heating the product obtained in S1 to a second preset temperature, maintaining the constant temperature and sequentially performing the first stage of light activation and electronic activation; S3, heating the product obtained in S2 to a third preset temperature, maintaining the constant temperature and sequentially performing the second stage of light activation and electronic activation; S4, cooling the product obtained in S3 to a second preset temperature; maintaining the constant temperature and sequentially performing the third stage of light activation and electronic activation; S5. Cooling the product obtained in S4 to a fourth preset temperature to complete performance activation.

2. The method for activating the performance of cadmium telluride power generation glass according to claim 1, characterized in that: The first preset temperature is 50-60°C.

3. The method for activating the performance of cadmium telluride power generation glass according to claim 1, characterized in that: The second preset temperature is 70-75°C.

4. The method for activating the performance of cadmium telluride power generation glass according to claim 1, characterized in that: The third preset temperature is 75-80°C.

5. The method for activating the performance of cadmium telluride power generation glass according to claim 1, characterized in that: The fourth preset temperature is 25°C.

6. The method for activating the performance of cadmium telluride power generation glass according to claim 1, characterized in that: In S1, the dark state thermal activation time is 170 to 185 seconds.

7. The method for activating the performance of cadmium telluride power generation glass according to claim 1, characterized in that: In S2, the light activation of the first stage is specifically to use a 300-500 nanometer band light source and irradiate with a light intensity of 1300-1500 W / ㎡; the electronically activated constant current source of the first stage outputs a current activation of 1.5-2.5 times the short-circuit current of the product, and the activation process is performed for 175-185 seconds.

8. The method for activating the performance of cadmium telluride power generation glass according to claim 7, characterized in that: In S3, the light activation of the second stage is specifically to use a 500-800 nanometer band light source and irradiate with a light intensity of 1800-2000W / ㎡; the electronically activated constant current source of the second stage outputs a current activation of 2-3 times the short-circuit current of the product, and the activation process is performed for 55-65 seconds.

9. The method for activating the performance of cadmium telluride power generation glass according to claim 7, characterized in that: In S4, the light activation in the third stage is specifically to use a light source in the 800-1000 nanometer band and irradiate with a light intensity of 1300-1500 W / ㎡; the electronically activated constant current source in the second stage outputs a current activation of 1.5-2.5 times the short-circuit current of the product, and the activation process is performed for 175-185 seconds.

10. A device based on the method for activating the performance of cadmium telluride power generation glass according to claims 1 to 9, characterized in that: The device comprises a first preheating chamber, a second preheating chamber, a first constant temperature reaction chamber, a third preheating chamber, a second constant temperature reaction chamber, a first cooling chamber, a third constant temperature reaction chamber and a second cooling chamber which are connected in sequence; the first constant temperature reaction chamber, the second constant temperature reaction chamber and the third constant temperature reaction chamber comprise mutually isolated and independently temperature-controlled lamp chambers and a constant temperature chamber arranged below the lamp chambers, and a light-transmitting, vacuum, light-transmitting and heat-insulating module is arranged between the lamp chambers and the constant temperature chambers.

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