Method for emitting light based on plasma-metal oxide coupling

Abstract

The invention relates to the technical field of novel light sources, and particularly discloses a plasma-metal oxide coupling-based light emitting method, which comprises the following steps of S1, selecting a metal oxide as a light emitting carrier; s2, constructing a discharge device comprising a high-voltage electrode, a grounding electrode, a light-emitting carrier, a direct-current adjustable power supply, a current-limiting resistor and a wire; s3, placing the metal oxide on the surface of a cathode and applying a direct-current voltage to form a plasma channel; and S4, realizing dynamic matching of the plasma excitation intensity and the carrier concentration of the metal oxide based on voltage regulation and control, and obtaining controllable light-emitting output. The method has the beneficial effects that a plasma channel is established on the surface of the metal oxide through direct-current discharge, dynamic regulation and control of a carrier recombination process are realized through voltage regulation under the synergistic effect of high-energy electron bombardment and a heat effect of plasmas, and the luminous efficiency and the light intensity stability are remarkably improved; and a brand new technical direction is provided for the development of high-brightness and low-energy-consumption solid-state light sources.

Description

Technical Field

[0001] The present invention relates to the technical field of novel light sources, and in particular to a method based on plasma-metal oxide coupled luminescence. Background Art

[0002] With the widespread application of light sources and luminescent materials in display technology, lighting, biomedical equipment, optoelectronic systems and other fields, high-intensity light sources have become core components in cutting-edge fields such as precision medicine, photocatalytic reactions, and material testing due to their high energy density, rapid energy transfer capability and non-invasive operation characteristics. The technological evolution of traditional high-intensity light sources can be divided into three stages:

[0003] 1. Thermal radiation light source stage: In the early 19th century, the Drummond light used a hydrogen-oxygen flame to heat quicklime, relying on high-temperature thermal radiation to produce strong light output. This light source was once used in high-power lighting and film projection. However, it required high temperatures (a harsh working environment), had low energy conversion efficiency, was bulky, and posed safety risks, leading to its gradual elimination.

[0004] 2. Gas Discharge Light Source Stage: In the mid-20th century, high-intensity discharge (HID) light sources, typified by xenon lamps, produced a broad spectrum output similar to natural sunlight through arc discharge of gas molecules under high pressure, driving development in lighting, sterilization, and solar simulation. However, HID light sources required precise packaging to maintain a high-pressure environment and relied on bulky ballasts and driver circuits. This resulted in slow system response, high maintenance costs, and a high failure rate, making them difficult to adapt to high-frequency or high-speed switching requirements.

[0005] 3. Semiconductor Light Source Stage: In the early 21st century, light-emitting diodes (LEDs), leveraging the electroluminescent properties of semiconductor PN junctions, achieved electro-optical conversion efficiencies of up to 60% and a long lifespan, becoming the mainstream lighting technology. However, under high-power density conditions, LEDs struggled to meet the demands of high-intensity transient excitation scenarios due to the Droop effect (a sudden drop in luminous efficiency at high carrier injection concentrations).

[0006] Existing technical bottlenecks:

[0007] Traditional HID light source: complex structure, slow response speed, high operation and maintenance costs;

[0008] Semiconductor LED light source: efficiency attenuates significantly at high power density, and light intensity stability is insufficient;

[0009] Limitations of spectrum and dynamic regulation: The spectrum regulation flexibility of gas discharge light sources is low, and it is difficult for LEDs to achieve wide spectrum dynamic adaptation.

[0010] To address the above problems, a new light-emitting mechanism is urgently needed that can not only circumvent the complex structure and low response speed defects of gas discharge light sources, but also break through the efficiency attenuation limitations of semiconductor light sources. Summary of the Invention

[0011] In order to solve the above problems, the present invention proposes a method based on plasma-metal oxide coupled luminescence, which utilizes the high-energy electron bombardment of plasma and the thermal effect to synergistically excite carrier recombination, achieve high-efficiency, high-stability and spectrally adjustable light output, and open up a new direction for high-intensity light source technology.

[0012] The technical solution of the present invention is achieved as follows:

[0013] A method based on plasma-metal oxide coupled luminescence, comprising the following steps:

[0014] S1. Select metal oxide as the luminescent carrier;

[0015] S2. Build a discharge device including a high-voltage electrode, a ground electrode, a light-emitting carrier, a DC adjustable power supply, a current-limiting resistor, and a wire;

[0016] S3, placing the metal oxide on the cathode surface, with a gap between the metal oxide surface and the anode, and applying a DC voltage to the cathode and the anode to form a plasma channel;

[0017] S4. Dynamic matching of plasma excitation intensity and metal oxide carrier concentration is achieved based on voltage regulation to obtain controllable luminescence output.

[0018] Preferably, in step S1, the metal element of the metal oxide is selected from any one of aluminum, magnesium, calcium or titanium.

[0019] Preferably, in step S1, the metal oxide is in a powdery structure with a diameter less than 50 μm.

[0020] Preferably, in step S2, the electrode system includes a positive electrode and a negative electrode, and the shapes include needle-shaped, spherical, and plate-shaped.

[0021] Preferably, in step S3, the metal oxide is applied to the cathode surface by spreading, smearing, laying or other means suitable for forming a stable powder layer.

[0022] Preferably, in step S4, linear regulation of the luminous intensity is achieved by adjusting the voltage.

[0023] By adopting the above technical solution, the beneficial effects of the present invention are:

[0024] (1) Breaking through the single mechanism of traditional semiconductor luminescence relying on PN junction carrier injection, the plasma-metal oxide coupled luminescence is realized. Through the synergistic effect of plasma high-energy electron bombardment and thermal effect, a high concentration of hole-electron pairs is excited on the metal oxide surface, effectively suppressing the problem of LED luminous efficiency attenuation under high power density.

[0025] (2) In view of the technical bottlenecks of existing high-intensity gas discharge light sources (HID), such as complex structure, high failure rate and slow response speed, the present invention constructs a discharge device including a high-voltage electrode, a ground electrode, a light-emitting carrier, a DC adjustable power supply, a current-limiting resistor and a wire. It has the advantages of simple structure, low manufacturing cost and fast response speed. At the same time, it can achieve stable strong light output and significantly improve the overall reliability of the system.

[0026] (3) By applying an adjustable DC voltage, the plasma excitation intensity can be precisely controlled, thereby achieving dynamic control of the luminescence intensity of the metal oxide. This control method has the characteristics of fast response and high control accuracy, and can achieve continuous and controllable light output. Furthermore, the generated emission light has a wide-band spectral distribution, which can meet the requirements of various application scenarios for an adjustable spectral range, expanding the practicality and applicability of this luminescence mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 is a flow chart of the present invention;

[0029] Figure 2 This is a schematic diagram of a prototype of a light-emitting device manufactured using the light-emitting method of the present invention;

[0030] Figure 3 This is a schematic diagram of the Al2O3 luminescence phenomenon.

[0031] The following are the descriptions of the reference numerals:

[0032] 1. DC adjustable power supply; 2. Current limiting resistor; 3. Anode; 4. Plasma channel; 5. Al2O3 powder; 6. Cathode. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] The concept behind this invention is to propose a novel luminescence method that couples discharge plasma with metal oxides, aiming to achieve a high-performance, strong light source with a simple structure, controllable light intensity, and a broad spectrum. This method is based on the technical path of "coupled excitation-field regulation-dynamic output." Firstly, a DC electric field is used to form a stable plasma channel, allowing high-energy electrons to fully couple with the metal oxide, generating a high density of hole-electron pairs on the material surface. Secondly, dynamic voltage regulation is used to match the plasma excitation intensity with the carrier concentration, thereby controlling both the energy injection and the luminescence intensity output during the luminescence process.

[0035] like Figure 1 As shown, a method based on plasma-metal oxide coupled luminescence includes the following steps:

[0036] S1. Select metal oxide as the luminescent carrier;

[0037] S2. Build a discharge device including a high voltage electrode, a ground electrode, a light emitting carrier, a DC adjustable power supply, a current limiting resistor and a wire, such as Figure 2 As shown, the high-voltage electrode is the anode 3, the grounded electrode is the cathode 6, the positive electrode of the DC adjustable power supply 1 is connected in series to the anode 3 through the current-limiting resistor 2, and the negative electrode of the DC adjustable power supply 1 is connected to the cathode 6. At the same time, the negative electrode of the DC adjustable power supply 1 is grounded through a wire. The anode 3 and the cathode 6 are located in corresponding positions and have a certain distance therebetween. After power is applied, a plasma channel 4 is formed between the anode 3 and the cathode 6.

[0038] S3, placing the metal oxide on the cathode surface, with a gap between the metal oxide surface and the anode, and applying a DC voltage to the cathode and the anode to form a plasma channel;

[0039] S4. Dynamic matching of plasma excitation intensity and metal oxide carrier concentration is achieved based on voltage regulation to obtain controllable luminescence output.

[0040] In this embodiment, the metal oxide is Al2O3 powder with a diameter of 50 μm and a mass of 100 mg.

[0041] In this embodiment, the discharge device is constructed as follows Figure 2As shown, the electrode system utilizes a needle-plate structure. Al2O3 powder is applied to the intersection of the plate electrode surface and the needle tip axis. The high-voltage needle electrode is connected to the positive power supply via a current-limiting resistor, while the grounded plate electrode is connected to the negative power supply. In this embodiment, the drive system utilizes a 0-15 kV programmable DC adjustable power supply, a 100 kΩ current-limiting resistor in series with an overvoltage protection module, and shielded conductors for stable high-voltage loading and safe grounding of the electrode.

[0042] In this embodiment, the linear adjustment of the luminous intensity is achieved by adjusting the voltage. The schematic diagram of the luminous phenomenon is shown in FIG. Figure 3 shown.

[0043] In this embodiment, the metal oxide may be MgO, CaO, or TiO2 in addition to Al2O3.

[0044] In this embodiment, the shapes of the electrodes include but are not limited to needle-shaped, spherical, and plate-shaped.

[0045] In this embodiment, the metal oxide may be placed on the cathode surface by, in addition to spreading, coating, laying or other means suitable for forming a stable powder layer.

[0046] Components not described in detail herein are prior art.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method based on plasma-metal oxide coupled luminescence, characterized in that: The following steps are involved: S1. Select metal oxide as the luminescent carrier; S2. Build a discharge device including a high-voltage electrode, a ground electrode, a light-emitting carrier, a DC adjustable power supply, a current-limiting resistor, and a wire; S3, placing the metal oxide on the cathode surface, with a gap between the metal oxide surface and the anode, and applying a DC voltage to the cathode and the anode to form a plasma channel; S4. Dynamic matching of plasma excitation intensity and metal oxide carrier concentration is achieved based on voltage regulation to obtain controllable luminescence output.

2. The method based on plasma-metal oxide coupled luminescence according to claim 1, characterized in that: In the step S1, the metal element of the metal oxide is selected from any one of aluminum, magnesium, calcium or titanium.

3. The method based on plasma-metal oxide coupled luminescence according to claim 1, characterized in that: In the step S1, the metal oxide is in a powdery structure with a diameter less than 50 μm.

4. The method based on plasma-metal oxide coupled luminescence according to claim 1, characterized in that: In step S2, the electrode system includes a positive electrode and a negative electrode, and the shapes include needle-shaped, spherical, and plate-shaped.

5. The method based on plasma-metal oxide coupled luminescence according to claim 1, characterized in that: In step S3, the metal oxide is arranged on the cathode surface in a manner that is suitable for forming a stable powder layer.

6. The method based on plasma-metal oxide coupled luminescence according to claim 5, characterized in that: In step S3, the metal oxide is applied to the cathode surface by spreading, smearing, or laying.

7. The method based on plasma-metal oxide coupled luminescence according to claim 1, characterized in that: In step S4, the linear adjustment of the luminous intensity is achieved by adjusting the voltage.

8. Use of the method based on plasma-metal oxide coupled luminescence according to any one of claims 1 to 7 in a solid-state light source.

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