Teaching demonstration device for application of luminescent nano material in semiconductor lighting device and demonstration method of teaching demonstration device

Abstract

The invention belongs to the technical field of teaching equipment, and particularly relates to a teaching demonstration device and demonstration method for application of a light-emitting nano material in a semiconductor lighting device, and the demonstration device comprises an incandescent phenomenon display system, a light-emitting diode display system and a fluorescent quantum dot material display system. The incandescent phenomenon display system comprises a tungsten filament incandescent lamp and a lamp holder with a wired switch, and the incandescent lamp is connected with the lamp holder with the wired switch through a screw and used for displaying the incandescent phenomenon in thermoluminescence; the light emitting diode display system comprises a blue light LED lamp bead, a white light LED lamp bead, a yellow YAG fluorescent powder plate, a battery and a battery box, and is used for displaying the cold light emitting phenomenon of the light emitting diode; the fluorescent quantum dot material display system comprises nano quantum dot powder, a dispersing agent, a transparent sample bottle and an ultraviolet lamp. Compared with the prior art, the method has the advantages that the popular science display content is rich, the operation is convenient, the application scene is wide, and the universality is high.

Description

Technical Field

[0001] The invention belongs to the technical field of teaching equipment, and in particular relates to a teaching demonstration device and a demonstration method for applying luminescent nano materials in semiconductor lighting devices. Background Art

[0002] Popular science is a public welfare undertaking and is of great significance in cultivating young people's scientific literacy and inspiring their spirit of scientific inquiry.

[0003] In the development history of lighting equipment, humans have entered the era of cold luminescence from the era of thermal luminescence. Due to energy efficiency issues, incandescent lamps have been eliminated and light-emitting diodes have been popularized. However, due to problems with LED light sources, people are gradually exploring healthy light sources. As a new type of nanomaterial, luminescent quantum dots have opened the door to exploring healthy light sources. They have attracted much attention for their unique optical and electronic properties, as well as their high luminescence efficiency, wide excitation spectrum, narrow emission spectrum, and adjustable luminescent color.

[0004] However, the principles of lighting and lighting equipment materials involve cross-domain professional knowledge such as inorganic chemical synthesis and optics. It is difficult to achieve intuitive, vivid and visual teaching demonstrations in popular science education for primary and secondary school students and citizens. Popular science devices under the existing technology often lack ornamental value, cannot attract visitors to actively observe, and have poor teaching significance. Therefore, in order to implement family science education in depth, comprehensively promote the "Science Laboratories into Ten Thousand Homes" campaign, and promote the construction of youth home laboratories, the present invention has developed a complete set of demonstration lighting device popular science products to help young students understand the luminous principles of lighting equipment and the development process and current status of lighting equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a teaching demonstration device and a demonstration method for the application of luminescent nanomaterials in semiconductor lighting devices in order to solve the above-mentioned technical problems, thereby achieving the effect of popular science display.

[0006] In view of this, the present invention provides a teaching demonstration device for the application of luminescent nanomaterials in semiconductor lighting devices, including: an incandescent phenomenon display system, a light emitting diode display system and a fluorescent quantum dot material display system, wherein the incandescent phenomenon display system includes a tungsten filament incandescent lamp and a lamp holder with a wire switch, the tungsten filament incandescent lamp is connected to the lamp holder with a wire switch through a screw mouth, so as to display the incandescent phenomenon in thermal luminescence; the light emitting diode display system includes blue light LED lamp beads, white light LED lamp beads, a yellow YAG phosphor board, a battery and a battery box, so as to display the cold luminescence phenomenon of the light emitting diode; the fluorescent quantum dot material display system includes nano quantum dot powder, a dispersant, a transparent sample bottle and an ultraviolet lamp.

[0007] In this technical solution, through practical operations, the continuous changes in lighting systems in people's daily lives and the advantages of fluorescent nanomaterials in lighting are vividly demonstrated. The popular science display is rich in content, easy to operate, and applicable to a wide range of scenarios, with high universality.

[0008] Furthermore, the wire switch lamp holder is provided with a screw hole, a switch and a plug.

[0009] Furthermore, the battery box comes with alligator clips for connecting blue or white LED lamp beads.

[0010] Furthermore, the nano quantum dot powder includes one or more of silicon quantum dots, germanium quantum dots, cadmium sulfide quantum dots, cadmium selenide quantum dots, cadmium telluride quantum dots, zinc selenide quantum dots, lead sulfide quantum dots, lead selenide quantum dots, indium phosphide quantum dots and indium arsenide quantum dots.

[0011] Further, the demonstration method includes the following steps:

[0012] S1: The tungsten filament incandescent lamp is connected to the wire switch lamp holder through the screw mouth, the plug of the wire switch lamp holder is inserted, and the switch on the wire switch lamp holder is turned on. The incandescent lamp emits light, showing obvious incandescence phenomenon;

[0013] S2: Put the battery on the battery box, connect the battery box to the blue LED lamp beads through the crocodile clip, turn on the switch, the blue LED lamp beads emit blue light, and shine the blue light on the packaged yellow YAG phosphor board. It is found that the blue LED lamp beads still emit blue light, but the light spot on the YAG phosphor panel is white. This demonstration process shows the technical principle of white light LED. Connect the blue LED lamp beads and white LED lamp beads through the battery box respectively, turn on the switch, the blue LED lamp beads and the white LED lamp beads emit blue light and white light respectively. After turning off the switch, compare the appearance of the blue LED lamp beads and the white LED lamp beads, and find that the shell of the white LED lamp beads is yellow, and the shell of the blue LED lamp beads is colorless and transparent, and the internal light-emitting chip can be clearly seen. The shell containing the YAG yellow phosphor is encapsulated with ordinary blue LED lamp beads to emit white light;

[0014] S3: Use ultraviolet light to irradiate quantum dot powder, and find that quantum dots have fluorescence phenomenon, but the luminescence effect is not obvious. Take a small amount of quantum dot powder of different colors into different transparent sample bottles, then dissolve them in dispersant, mix them evenly, and then use ultraviolet light to irradiate and excite. Different transparent sample bottles emit several bright colors of light.

[0015] The beneficial effect of the present invention is that it vividly demonstrates the continuous changes in lighting systems in people's daily lives and the advantages of fluorescent nanomaterials in lighting through practical operations. The popular science display is rich in content, easy to operate, and has a wide range of applicable scenarios and high universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a physical picture of the incandescent phenomenon display system;

[0017] Figure 2 This is a physical picture of the light emitting diode display system;

[0018] Figure 3 This is a physical picture of the fluorescent quantum dot material display system;

[0019] Figure 4 It is a flow chart showing the explanation of the present invention;

[0020] Figure 5 It is an operation flow chart of the present invention;

[0021] Figure 6 It is a plan view of the popular science kit of the present invention.

[0022] Figure 7 It is the intended effect that the LED display system is expected to achieve.

[0023] Figure 8 This is a schematic diagram of the effect achieved by the fluorescent quantum dot material display system.

[0024] Markings in the figure: 1. Tungsten filament incandescent lamp; 2. Lamp holder with wire switch; 3. Screw mouth; 4. Plug; 5. Blue light LED lamp bead; 6. White light LED lamp bead; 7. Yellow YAG phosphor board; 8. Battery; 9. Battery box; 10. Nano quantum dot powder; 11. Dispersant; 12. Transparent sample bottle; 13. Ultraviolet lamp. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0026] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0028] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0029] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0030] like Figure 1-8 As shown, the teaching demonstration device for the application of a luminescent nanomaterial in a semiconductor lighting device according to the present invention comprises a light emitting diode display system and a fluorescent quantum dot material display system, such as Figure 1 As shown, the incandescent phenomenon display system includes a tungsten filament incandescent lamp 1 and a wire switch lamp holder 2, and the tungsten filament incandescent lamp 1 is connected to the wire switch lamp holder 2 through a screw 3 to display the incandescent phenomenon in thermal luminescence; Figure 2 As shown, the light emitting diode display system includes a blue light LED lamp bead 5, a white light LED lamp bead 6, a yellow YAG phosphor board 7, a battery 8 and a battery box 9, which are used to display the cold luminescence phenomenon of the light emitting diode; Figure 3 As shown, the fluorescent quantum dot material display system includes nano quantum dot powder 10, a dispersant 11, a transparent sample bottle 12 and an ultraviolet lamp 13.

[0031] In specific embodiment 1, the tungsten filament incandescent lamp 1 is connected to the wire switch lamp holder 2 through the screw mouth 3, the plug 4 of the wire switch lamp holder 2 is inserted, and the switch on the wire switch lamp holder 2 is turned on, and the incandescent lamp emits light, showing obvious incandescence phenomenon.

[0032] In the specific embodiment 2, the battery 8 is installed in the battery box 9, and the battery box 9 is connected to the blue light LED lamp bead 5 through the alligator clip. When the switch is turned on, the lamp bead emits blue light. This is the invention of the 2014 Nobel Prize in Physics. Furthermore, the emitted blue light is irradiated on the packaged yellow YAG phosphor board 7, and it is found that the LED lamp bead still emits blue light, but the light spot on the YAG phosphor panel is a white light spot. This demonstration process shows the technical principle of white light LED, using the aforementioned "blue light LED" technology in combination with phosphor to form white light, involving the three primary colors of light. superposition; further, the blue light LED lamp bead 5 and the white light LED lamp bead 6 are respectively connected through the battery box 9, and the switch is turned on, the lamp beads emit blue light and white light respectively. After turning off the switch, the appearance of the blue light LED lamp bead 5 and the white light LED lamp bead 6 are compared, and it is found that the shell of the white light LED lamp bead 6 is yellow, and the shell of the blue light LED lamp bead 5 is colorless and transparent, and the internal light-emitting chip can be clearly seen. The demonstration process explains the light-emitting principle of the commercial white light LED lamp, and uses ordinary blue light LED lamp bead 5 to encapsulate the shell containing YAG yellow phosphor to emit white light.

[0033] In specific embodiment 3, quantum dot powder is irradiated with ultraviolet light, and it is found that quantum dots have fluorescence, but the luminescence effect is not obvious. Different quantum dot powders of different colors are taken in small amounts into different transparent sample bottles 12, and then mixed and dispersed in dispersant 11, and then irradiated and excited with ultraviolet light 13, and different transparent sample bottles 12 emit bright light of several colors.

[0034] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A teaching demonstration device for the application of luminescent nanomaterials in semiconductor lighting devices, characterized in that ,include: Incandescence phenomenon display system, light-emitting diode display system and fluorescent quantum dot material display system; The incandescent phenomenon display system comprises a tungsten filament incandescent lamp and a lamp holder with a wire switch, wherein the tungsten filament incandescent lamp is connected to the lamp holder with a wire switch through a screw hole to display the incandescent phenomenon in thermal luminescence; The light emitting diode display system includes blue light LED lamp beads, white light LED lamp beads, yellow YAG phosphor board, battery and battery box, which are used to display the cold luminescence phenomenon of the light emitting diode; The fluorescent quantum dot material display system comprises nano quantum dot powder, a dispersant, a transparent sample bottle and an ultraviolet lamp.

2. The teaching demonstration device for the application of luminescent nanomaterials in semiconductor lighting devices according to claim 1, characterized in that: The wired switch lamp holder has a screw hole, a switch and a plug.

3. The teaching demonstration device for applying luminescent nanomaterials in semiconductor lighting devices according to claim 1, characterized in that: The battery holder comes with alligator clips for connecting blue or white LED beads.

4. The teaching demonstration device for the application of luminescent nanomaterials in semiconductor lighting devices according to claim 1, characterized in that: The quantum dot material includes one or more of silicon quantum dots, germanium quantum dots, cadmium sulfide quantum dots, cadmium selenide quantum dots, cadmium telluride quantum dots, zinc selenide quantum dots, lead sulfide quantum dots, lead selenide quantum dots, indium phosphide quantum dots and indium arsenide quantum dots.

5. A demonstration method applicable to the teaching demonstration device for the application of a luminescent nanomaterial in a semiconductor lighting device as claimed in claim 1, characterized in that: The following steps are involved: S1: The tungsten filament incandescent lamp is connected to the wire switch lamp holder through the screw mouth, the plug of the wire switch lamp holder is inserted, and the switch on the wire switch lamp holder is turned on. The incandescent lamp emits light, showing obvious incandescence phenomenon; S2: Put the battery on the battery box, connect the battery box to the blue LED lamp beads through the crocodile clip, turn on the switch, the blue LED lamp beads emit blue light, and shine the blue light on the packaged yellow YAG phosphor board. It is found that the blue LED lamp beads still emit blue light, but the light spot on the YAG phosphor panel is white. This demonstration process shows the technical principle of white light LED. Connect the blue LED lamp beads and white LED lamp beads through the battery box respectively, turn on the switch, the blue LED lamp beads and the white LED lamp beads emit blue light and white light respectively. After turning off the switch, compare the appearance of the blue LED lamp beads and the white LED lamp beads, and find that the shell of the white LED lamp beads is yellow, and the shell of the blue LED lamp beads is colorless and transparent, and the internal light-emitting chip can be clearly seen. The shell containing the YAG yellow phosphor is encapsulated with ordinary blue LED lamp beads to emit white light; S3: Use ultraviolet light to irradiate quantum dot powder, and find that quantum dots have fluorescence phenomenon, but the luminescence effect is not obvious. Take a small amount of quantum dot powder of different colors into different transparent sample bottles, then evenly disperse them in the dispersant, and then use ultraviolet light to irradiate and excite. Different transparent sample bottles emit several bright colors of light.

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