Device for testing light conversion effect of light conversion adhesive film

Abstract

The utility model discloses a light conversion effect testing device for a light conversion adhesive film, which comprises a light source, a monochromator, a light filtering component, a detector and a display which are sequentially distributed along the direction of a light path, and a testing station for placing the light conversion adhesive film to be tested is arranged between the monochromator and the light filtering component. The light filtering component comprises an ultraviolet light filter and a visible light filter; and one of the ultraviolet light filter and the visible light filter is selected to be mounted on a light path between the test station and the detector. According to the method, the ultraviolet light not absorbed by the light conversion adhesive film and the visible light converted by the ultraviolet light absorbed by the light conversion adhesive film are tested separately, when the light transmittance of the light conversion adhesive film is different, whether the influence factor is the light conversion dosage or the failure of the light conversion agent is judged, and the concentration stability of the light conversion agent and the optical performance stability of the light conversion adhesive film are represented based on the influence factor. The purpose of representing the actual light conversion performance of the light conversion adhesive film is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a light-conversion effect testing device for a light-conversion adhesive film. Background Art

[0002] In recent years, the photovoltaic industry has vigorously promoted various new high-efficiency cells, such as heterojunction cells. The H-Si bonds in heterojunction cells are easily broken under UV light, which degrades the passivation effect. After long-term outdoor operation, encapsulated modules will experience EL shadowing, resulting in reduced cell conversion efficiency and power generation. Therefore, traditional technologies use UV-cutoff films or UV-light-convertible films for encapsulation and protection when encapsulating heterojunction cells. However, the power of modules encapsulated with UV-cutoff films is 8W-10W lower than that of modules encapsulated with UV-light-convertible films. Therefore, heterojunction cells are often encapsulated with UV-light-convertible films to protect the modules while protecting their lifespan.

[0003] Currently, the light conversion efficiency and batch stability of UV light-transfer films cannot be monitored promptly at the module application end. For example, when the light-transfer agent concentration is low, UV light cannot be effectively converted into visible light, resulting in poor module protection. When the light-transfer agent concentration is too high, the UV light-transfer film absorbs some visible light, resulting in a decrease in module power. UV light-transfer film is tested for transmittance in the UV band using a conventional UV spectrophotometer. However, the UV transmittance test value includes both the UV light that passes through the film without being absorbed and the visible light that is absorbed and converted, and therefore cannot effectively represent the film's actual light conversion performance. Utility Model Content

[0004] Based on this, it is necessary to provide a device for testing the light conversion effect of UV-converting adhesive films. This device characterizes the stability of the light conversion agent concentration and the stability of the optical properties of the UV-converting adhesive film by separately testing the ultraviolet light not absorbed by the UV-converting adhesive film and the visible light converted by the UV-converting adhesive film after absorbing the ultraviolet light.

[0005] An embodiment of the present application provides a device for testing the light conversion effect of a light-converting adhesive film.

[0006] A device for testing the light conversion effect of a light-transfer adhesive film comprises a light source, a monochromator, a filter component, a detector and a display, which are sequentially distributed along the light path. A test station for placing the light-transfer adhesive film to be tested is provided between the monochromator and the filter component. The filter component comprises an ultraviolet filter and a visible light filter. The ultraviolet filter is used to absorb ultraviolet light transmitted through the light-transfer adhesive film, and the visible light filter is used to absorb visible light transmitted through the light-transfer adhesive film. One of the ultraviolet filter and the visible light filter is selectively installed in the light path between the test station and the detector according to test requirements.

[0007] In some embodiments, the filtering component includes a first installation station and a second installation station, the visible light filter is installed at the first installation station, and the ultraviolet light filter is installed at the second installation station, and the first installation station and the second installation station can switch positions to ensure that the ultraviolet light filter or the visible light filter is located in the optical path between the test station and the detector.

[0008] In some embodiments, the first installation station and the second installation station can switch positions in a rotational manner.

[0009] In some embodiments, the filter component is further provided with an indicator for indicating the position of the first installation station and the position of the second installation station.

[0010] In some embodiments, the filter component further includes a driving member configured to drive the first installation station and the second installation station to switch in a rotational manner.

[0011] In some embodiments, the light-converting adhesive film light conversion effect testing device further includes an amplifier, which is disposed between the detector and the display and is configured to amplify the signal detected by the detector.

[0012] In some embodiments, the display is a touch screen, and the display can be used for human-computer interaction.

[0013] In some embodiments, the monochromator includes an incident slit, a collimator, a dispersion element, a focusing device and an exit slit, the incident slit is used to limit stray light from entering the monochromator, the collimator is used to convert the incident light beam into a parallel light beam before entering the dispersion element, the dispersion element is used to decompose the composite light of the parallel light beams into monochromatic light, the focusing device is used to focus the monochromatic light from the dispersion element on the exit slit, and the exit slit is used to limit the passband width.

[0014] In some embodiments, the dispersive element includes a prism or a grating.

[0015] In some embodiments, the focusing device includes a lens or a concave mirror.

[0016] The above-mentioned photoconversion film light conversion effect testing device, through the setting that the ultraviolet light filter and the visible light filter are selectively installed on the optical path between the test station and the detector according to the test needs, can separately test the ultraviolet light not absorbed by the photoconversion film and the visible light converted after the ultraviolet light absorbed by the photoconversion film. It is further known that when there is a difference in the transmittance of the photoconversion film, the influencing factor is whether it is the light conversion dose or the failure of the light conversion agent, and based on the light conversion dose or the failure of the light conversion agent, the light conversion agent concentration stability and the optical performance stability of the photoconversion film are characterized, so as to achieve the purpose of effectively characterizing the actual light conversion performance of the photoconversion film. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0018] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0019] Figure 1 Schematic diagram of a device for testing the light conversion effect of a light-converting adhesive film according to an embodiment of the present invention.

[0020] Description of Reference Numerals

[0021] 10. Light transfer film light transfer effect testing device; 100. Light source; 200. Monochromator; 300. Filter component; 400. Detector; 500. Display; 600. Amplifier; 20. UV light transfer film. DETAILED DESCRIPTION

[0022] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0024] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0025] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0026] In the description of this utility model, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of the terms "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] In this application, when referring to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​within the numerical interval is deemed to be continuous and includes the two numerical endpoints of the numerical interval (i.e., the minimum and maximum values), as well as each numerical value between the two numerical endpoints. Unless otherwise specified, when a numerical interval refers only to integers within the numerical interval, it includes the two endpoint integers of the numerical range, as well as each integer between the two endpoints, which is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe a feature or characteristic, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical ranges disclosed in this application should be understood to include any and all subranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, percentage, ratio, etc. "Numerical interval" is broadly allowed to include quantitative intervals such as percentage intervals, ratio intervals, and ratio intervals.

[0029] This embodiment of the present application provides a device 10 for testing the light conversion performance of UV-transfer adhesive films. This device addresses the existing problem that conventional UV spectrophotometers cannot effectively characterize the actual light conversion performance of UV-transfer adhesive films when measuring their UV transmittance. The device 10 is described below with reference to the accompanying drawings.

[0030] The light conversion effect testing device 10 of the light conversion adhesive film provided in the embodiment of the present application is exemplary, please refer to Figure 1 As shown, Figure 1 This is a schematic diagram of a device 10 for testing the light conversion performance of a light-transfer adhesive film, provided in an embodiment of the present application. This device 10 can be used to test the ultraviolet transmittance of light-transfer adhesive films, such as UV light-transfer adhesive film 20, to effectively characterize the film's actual light conversion performance. The following description will be based on the UV light-transfer adhesive film 20.

[0031] In order to more clearly illustrate the structure of the light transfer film light conversion effect testing device 10, the light transfer film light conversion effect testing device 10 will be introduced in conjunction with the accompanying drawings. Figure 1 As shown, a light conversion effect testing device 10 of a light-converting adhesive film includes a light source 100, a monochromator 200, a filter component 300, a detector 400 and a display 500 distributed in sequence along the light path.

[0032] The monochromator 200 is used to separate the light emitted by the light source 100 into required monochromatic light.

[0033] A testing station for placing the optical transfer film to be tested is provided between the monochromator 200 and the filter component 300 .

[0034] The filter component 300 includes a UV filter and a visible light filter. The UV filter absorbs ultraviolet light that passes through the optical transfer film. The visible light filter absorbs visible light that passes through the optical transfer film. Depending on the test requirements, either the UV filter or the visible light filter is installed in the optical path between the test station and the detector 400.

[0035] The detector 400 is used to detect the number or energy of visible light photons transferred through the UV light transfer film 20, or the number or energy of ultraviolet light photons transferred through the UV light transfer film 20. The number of photons can be represented by transmittance data.

[0036] In some embodiments, the filter component 300 includes a first installation station and a second installation station. The visible light filter is installed in the first installation station. The ultraviolet light filter is installed in the second installation station. The first installation station and the second installation station can be switched to achieve the ultraviolet light filter being located in the optical path between the test station and the detector 400, or the visible light filter being located in the optical path between the test station and the detector 400. The first installation station and the second installation station are located in the adjacent Figure 1 Not shown in the figure.

[0037] In some embodiments, the first installation station and the second installation station can be switched in a rotational manner. It is understood that in other embodiments, the first installation station and the second installation station can also be switched in other ways, such as horizontal movement, vertical movement, etc.

[0038] In some embodiments, the filter component 300 is further provided with an indicator for indicating the position of the first installation station and the second installation station. The indicator can be in the form of an indicator symbol, an indicator light, etc. The provision of the indicator can facilitate reminding the operator to identify the position of the first installation station and the second installation station.

[0039] In some embodiments, the filter component 300 further includes a driving member. The driving member is used to drive the first installation station to switch with the second installation station, for example, by rotating. Figure 1 The driving member may be a driving motor, a driving cylinder, etc.

[0040] In some embodiments, the first installation station and the second installation station can be set on the same carrier. In this case, the driving member is connected to the carrier, and the driving member is used to drive the carrier to move, such as rotate, to achieve rotational switching between the first installation station and the second installation station.

[0041] In some of these examples, see Figure 1 As shown, the light conversion effect testing device 10 for light-converting adhesive film further includes an amplifier 600. The amplifier 600 is disposed between the detector 400 and the display 500. The amplifier 600 is used to amplify the signal detected by the detector 400.

[0042] In some embodiments, the display 500 is a touch screen and can be used for human-computer interaction.

[0043] In some embodiments, the light source 100 , the detector 400 , the display 500 , the amplifier 600 , and the driver may be electrically connected to the control mechanism, respectively.

[0044] In some embodiments, the monochromator 200 includes an incident slit, a collimator, a dispersion element, a focusing device and an exit slit. The incident slit is used to limit stray light from entering the monochromator 200. The collimator is used to convert the incident light beam into a parallel light beam before entering the dispersion element. The dispersion element is used to decompose the composite light of the parallel light beams into monochromatic light. The focusing device is used to focus the monochromatic light from the dispersion element on the exit slit. The exit slit is used to limit the passband width of the monochromatic light emitted from the monochromator 200, and the passband width of the exit slit is adjustable. Through the cooperation of the above-mentioned incident slit, collimator, dispersion element, focusing device and exit slit, the light emitted by the light source 100 is separated into the required monochromatic light and enters the filter component 300. In the attached Figure 1 In the figure, the entrance slit, collimating mirror, dispersive element, focusing device and exit slit are not shown.

[0045] In some of these embodiments, the dispersive element comprises a prism or a grating.

[0046] In some embodiments, the focusing device includes a lens or a concave mirror.

[0047] Another embodiment of the present application further provides a spectrophotometer, which includes the aforementioned light-conversion adhesive film light-conversion effect testing device 10 .

[0048] When the light transfer film light transfer effect testing device 10 is used to test the transmittance of the UV light transfer film 20, the first testing method is as follows:

[0049] The UV light transfer film 20 is placed on the test station of the light transfer film light transfer effect testing device 10, and then either an ultraviolet filter or a visible light filter is selectively added to the optical path behind the UV light transfer film 20. After adding the ultraviolet filter, the ultraviolet filter absorbs ultraviolet light transmitted through the UV light transfer film 20 within the wavelength range of 280nm-380nm, and the test value of the detector 400 is the number of photons or energy of visible light transmitted through the UV light transfer film 20. After adding the visible light filter, the visible light filter absorbs visible light transmitted from the UV light transfer film 20 within the wavelength range of 280nm-380nm, and the test value of the detector 400 is the number of photons or energy of ultraviolet light transmitted through the UV light transfer film 20.

[0050] When the light transfer film light transfer effect testing device 10 is used to test the transmittance of the UV light transfer film 20, the second testing method is as follows:

[0051] The UV light transfer film 20 is placed on the test station of the light transfer film light transfer effect testing device 10. The first installation station and the second installation station are driven by a driving member to switch positions so that the ultraviolet light filter is located in the optical path between the test station and the detector 400. Within the wavelength range of 280nm-380nm, the ultraviolet light filter absorbs the ultraviolet light transmitted through the UV light transfer film 20. The test value of the detector 400 is the number of photons or energy of visible light transmitted through the UV light transfer film 20. The first installation station and the second installation station are driven by a driving member to switch positions so that the visible light filter is located in the optical path between the test station and the detector 400. Within the wavelength range of 280nm-380nm, the visible light filter absorbs the visible light transmitted through the UV light transfer film 20. The test value of the detector 400 is the number of photons or energy of ultraviolet light transmitted through the UV light transfer film 20.

[0052] When the concentration of the photoconverter in the UV-light transfer film 20 is low, it cannot effectively convert ultraviolet light into visible light. When the concentration of the photoconverter is too high, it absorbs some visible light. When a conventional ultraviolet spectrophotometer tests the transmittance of the UV-band of the UV-light transfer film 20, the test value in the ultraviolet band includes the ultraviolet light that was not absorbed by the UV-light transfer film 20 but passed through, as well as the visible light that was absorbed and converted. Based on this, when the photoconverter film light conversion effect testing device 10 of the present application is used, a UV filter and a visible light filter are selected according to the test needs to be installed in the optical path between the test station and the detector 400, and the number or energy of ultraviolet light photons not absorbed by the UV-light transfer film 20 and the number or energy of visible light photons converted by the UV-light transfer film 20 after absorbing ultraviolet light are separately tested. For example, the normal photoconverter concentration of the UV-light transfer film 20 is X, where X can be a fixed value or a certain range. By setting a UV filter, the number of visible light photons transmitted through the UV light transfer film 20 is measured, and this photon count is represented by the transmittance Y1. Furthermore, by setting a visible light filter, the number of UV photons transmitted through the UV light transfer film 20 is measured, and this photon count is represented by the transmittance Y2. When 10% < Y1 < 20% and Y2 > 5%, the photoconverter concentration in the UV light transfer film 20 is low; when Y1 < 10% and Y2 > 5%, the photoconverter concentration in the UV light transfer film 20 is partially ineffective; and when Y1 > 20% and Y2 < 5%, the photoconverter concentration in the UV light transfer film 20 is high.

[0053] For example, when the transmittance of light-converting film A is tested using the above-mentioned light-converting film light-converting effect testing device 10, the Y1 value is 15% and the Y2 value is 7.5%, which indicates that the light-converting agent concentration of light-converting film A is low. When the transmittance of light-converting film B is tested using the above-mentioned light-converting film light-converting effect testing device 10, the Y1 value is 5% and the Y2 value is 8%, indicating that the light-converting agent of light-converting film B has partial failure. When the transmittance of light-converting film C is tested using the above-mentioned light-converting film light-converting effect testing device 10, the Y1 value is 22% and the Y2 value is 2%, which indicates that the light-converting agent concentration of light-converting film C is too high. Based on the above-mentioned test data, it can be known that when there is a difference in the transmittance of UV light-converting film 20, the influencing factor is the light-converting dosage or the failure of the light-converting agent. Therefore, the light-converting film light-converting effect testing device 10 of the present application can effectively characterize the actual light-converting performance of UV light-converting film 20.

[0054] To summarize, the present application uses an ultraviolet light filter and a visible light filter to be installed on the optical path between the test station and the detector 400 according to the test needs, and separately tests the ultraviolet light not absorbed by the light-transfer film, such as the UV light-transfer film 20, and the visible light converted after the ultraviolet light absorbed by the light-transfer film. It can further be known that when there is a difference in the transmittance of the UV light-transfer film 20, the influencing factor is whether it is the light-transfer dose or the failure of the light-transfer agent, and based on the light-transfer dose or the failure of the light-transfer agent, the concentration stability of the light-transfer agent and the stability of the optical performance of the UV light-transfer film 20 are characterized, so as to achieve the purpose of effectively characterizing the actual light-transfer performance of the UV light-transfer film 20.

[0055] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0056] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A device (10) for testing the light conversion effect of a light-converting adhesive film, characterized in that: The invention comprises a light source (100), a monochromator (200), a filter component (300), a detector (400) and a display (500) which are sequentially distributed along the optical path. A test station for placing a light transfer film to be tested is provided between the monochromator (200) and the filter component (300). The filter component (300) comprises an ultraviolet filter and a visible light filter. The ultraviolet filter is used to absorb ultraviolet light passing through the light transfer film, and the visible light filter is used to absorb visible light passing through the light transfer film. The ultraviolet filter and the visible light filter are selectively installed on the optical path between the test station and the detector (400) according to test requirements.

2. The light conversion effect testing device (10) of light conversion adhesive film according to claim 1, characterized in that: The filter component (300) includes a first installation station and a second installation station, the visible light filter is installed at the first installation station, and the ultraviolet light filter is installed at the second installation station, and the first installation station and the second installation station can switch positions to achieve that the ultraviolet light filter or the visible light filter is located on the optical path between the test station and the detector (400).

3. The light conversion effect testing device (10) of light conversion adhesive film according to claim 2, characterized in that: The first installation station and the second installation station can switch positions in a rotation manner.

4. The light conversion effect testing device (10) of light conversion adhesive film according to claim 2, characterized in that: The filter component (300) is also provided with an indicator for indicating the first installation station position and the second installation station position.

5. The light conversion effect testing device (10) of light conversion adhesive film according to claim 2, characterized in that: The filter component (300) further comprises a driving member, which is used to drive the first installation station and the second installation station to switch in a rotational manner.

6. The light conversion effect testing device (10) of light conversion adhesive film according to any one of claims 1 to 5, characterized in that: The light-conversion adhesive film light conversion effect testing device (10) further comprises an amplifier (600), wherein the amplifier (600) is arranged between the detector (400) and the display (500), and the amplifier (600) is used to amplify the signal detected by the detector (400).

7. The light conversion effect testing device (10) of light conversion adhesive film according to any one of claims 1 to 5, characterized in that: The display (500) is a touch screen, and the display (500) can be used for human-computer interaction.

8. The light conversion effect testing device (10) of light conversion adhesive film according to any one of claims 1 to 5, characterized in that: The monochromator (200) comprises an incident slit, a collimator, a dispersion element, a focusing device and an exit slit, wherein the incident slit is used to limit stray light from entering the monochromator (200), the collimator is used to convert the incident light beam into a parallel light beam before entering the dispersion element, the dispersion element is used to decompose the composite light of the parallel light beam into monochromatic light, the focusing device is used to focus the monochromatic light from the dispersion element on the exit slit, and the exit slit is used to limit the passband width.

9. The light conversion effect testing device (10) of light conversion adhesive film according to claim 8, characterized in that: The dispersive element includes a prism or a grating.

10. The light conversion effect testing device (10) of light conversion adhesive film according to claim 8, characterized in that: The focusing device includes a lens or a concave reflecting mirror.

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