17 results about "Luminescence spectra" patented technology

An oxide fluorescent material comprises: at least one first element M1 selected from Li, Na, K, Rb, and Cs; at least one second element M2 selected from Mg, Ca, Sr, Ba, and Zn; at least one third element M3 selected from B, Al, Ga, In, and rare earth elements; at least one fourth element M4 selected from Si, Ti, Ge, Zr, Sn, Hf, and Pb; O; and Cr, wherein when the molar ratio of the at least one fourth element M4 in 1 mol of the composition is 5, the molar ratio of the at least one first element M1 is 0.7 or more and 1.3 or less, the molar ratio of the at least one second element M2 is 1.5 or more and 2.5 or less, the molar ratio of the at least one third element M3 is 0.7 or more and 1.3 or less, the molar ratio of oxygen is 12.9 or more and 15.1 or less, and the molar ratio of Cr is more than 0 and 0.2 or less, and wherein the oxide fluorescent material has a light emission peak wavelength in a range of 700 nm or more and 1,050 nm or less in a light emission spectrum of the oxide fluorescent material.

The present application relates to the technical field of LED, in particular to an infrared LED epitaxial wafer for improving spectrum and a preparation method thereof.The infrared LED epitaxial wafer comprises, from bottom to top, an N-type GaAs substrate, an N-type GaAs buffer layer, an N-type current expansion layer, an N-type confinement layer, a voltage division type single-peak light emitting layer, a P-type confinement layer, a P-type current expansion layer and a P-face contact layer.The voltage division type single-peak light emitting layer is a periodic structure grown by a fluctuation layer, a quantum well layer, a strain transition layer and a quantum barrier layer in sequence.Based on a conventional 940nm infrared LED epitaxial structure, the voltage division type single-peak light emitting layer is designed, which can effectively solve the double-peak problem caused by the light emitting spectrum anomaly due to the In component segregation local state, stress sudden change energy level splitting and unstable TMIn source of the precursor supply and other factors.The infrared LED has stable spectrum and only a single light emitting peak, and has excellent performance.

The invention discloses a spectral measurement device and method for dynamically and controllably applying force and temperature. The device comprises a base, a liftable platform, a sample fixing device, a force loading kit, a heating plate, a heat preservation component and a spectrum acquisition system. The force loading suite can apply a periodic mechanical load with stable amplitude through eccentric transmission and force feedback control; the optical fiber probe is coaxially arranged along the hollow loading component to realize high matching of loading and a spectrum acquisition path; the sample fixing device and the heating plate are matched with the heat preservation component to form a constant-temperature light-proof environment, so that stable test conditions are provided. The problems that in the prior art, mechanical loads are difficult to load stably, temperature distribution is uneven, and spectrum collection is prone to being interfered are solved, synchronous, stable and high-fidelity collection of luminescent spectrums under the dynamic coupling condition of force and temperature is achieved, repeatability and reliability of test results are improved, and the method is suitable for popularization and application. The method is suitable for dynamic spectrum collection under the multi-field coupling condition.

According to an aspect of the present invention, provided may be a light-emitting device comprising: a substrate; a first light-emitting element disposed on the substrate and generating light of a first emission spectrum having a first dominant wavelength, by a current supplied through the substrate; and a second light-emitting element disposed on the substrate and generating light of a second emission spectrum having a second dominant wavelength and at least partially overlapping the first emission spectrum, by the current supplied through the substrate, wherein the intensity of the first dominant wavelength and the intensity of the second dominant wavelength are different from each other.

The application discloses a kind of alpha, beta surface pollution detector light leakage detection method and device, it is related to radiation monitoring sensing technical field, the method of the present application includes: using sensor to collect the light signal in detection chamber, obtain the intensity component of red, green, blue three color channels;The ratio of blue light intensity component and the sum of red, green light intensity component is calculated;According to the ratio and the dynamic threshold parameter of preset light leakage determination;If it is determined that natural light leaks, trigger alarm and shield current detection data.The core of the present application is that the luminescence spectrum of ZnS (Ag) scintillator is concentrated in blue light band, while natural light is full-band continuous spectrum.By analyzing the proportional relationship of RGB color components, the accurate and rapid differentiation between light leakage signal and real nuclear radiation signal is realized.This method effectively solves the technical problem that traditional hardware shielding method cannot identify micro-hole light leakage, and has the advantages of high detection sensitivity, fast response and strong anti-interference ability.

The application discloses a detection system based on atmospheric pressure plasma emission spectrum, belongs to the field of spectrum, and is used for gas detection under atmospheric pressure. The system comprises a microwave excitation source, a microwave mild ionization device connected with the microwave excitation source, a gas sampling system for feeding the to-be-detected gas into the microwave mild ionization device, a spectrum measurement system for collecting and detecting light emission spectrum, and the microwave mild ionization device comprises a plasma generation cavity, a hollow copper column, a copper ring, a hollow quartz tube and a tuning knob. The end of the plasma generation cavity discharging tail gas is provided with a recess, the hollow copper column and the copper ring are arranged in the plasma generation cavity, and the copper ring semi-encapsulates the hollow copper column. The system can generate plasma in an air environment under atmospheric pressure, greatly simplifies a sampling system and reduces the volume of the sampling system.

The invention discloses a light leakage detection method and device for an alpha and beta surface pollution detector, and relates to the technical field of radiation monitoring sensing, and the method comprises the steps: collecting an optical signal in a detection cavity through a sensor, and obtaining the intensity components of three color channels of red, green and blue; calculating the ratio of the blue light intensity component to the sum of the red and green light intensity components; performing light leakage judgment according to the ratio and a preset dynamic threshold parameter; if it is judged that the natural light leaks, an alarm is triggered, and current detection data are shielded. The core of the method is that the light leakage signal and the real nuclear radiation signal are accurately and rapidly distinguished by analyzing the proportional relation of RGB color components by utilizing the characteristics that the luminescent spectrum of the ZnS (Ag) scintillator is concentrated in a blue light band and the natural light is a full-band continuous spectrum. The method effectively solves the technical problem that the traditional hardware shielding method cannot identify micropore light leakage, and has the advantages of high detection sensitivity, fast response and strong anti-interference capability.

The application provides a high-efficiency long-life blue phosphor organic light-emitting device and display device, the blue phosphor organic light-emitting device comprising a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer and an electron transport layer; the light-emitting layer comprises a P-type host material, an N-type host material and a doping material; the light-emission spectrum peak of the P-type host material is 365nm-400nm, and the half-peak width is 35nm-45nm; the light-emission spectrum peak of the N-type host material is 410nm-450nm, and the half-peak width is 60nm-85nm; the light-emission spectrum peak of the doping material is 455nm-470nm, and the half-peak width is 18nm-24nm; the T1 energy level of the P-type host material is greater than the T1 energy level of the doping material; and the T1 energy level of the N-type host material is greater than the T1 energy level of the doping material. The blue phosphor organic light-emitting device provided by the application has high efficiency and long life.

This invention relates to the field of automated laser chip heating processing control technology, and in particular to a laser heating rework system. The system includes a spectral mapping module that obtains wavelength drift data by analyzing transient photoluminescence spectra collected by a fluorescence thermometer, and uses this data to identify the coordinates of poorly heated locations to generate a transient thermal state matrix. A tensor calculation module combines the microscopic orientation data of the material's crystal lattice structure to calculate the thermal conductivity coefficient and generate a thermal conductivity tensor matrix. A polarization synthesis module retrieves photon absorption cross-section difference parameters to inversely deduce a physical compensation array and generate a spatial polarization phase map. A polarization modulation device generates a non-uniform vector polarized light field based on this map, driving a laser output device to inject the light field into the coordinates of the poorly heated location to perform targeted heat injection. This invention utilizes the difference in physical absorption rate of photons with different polarization states in the underlying crystal lattice arrangement to correct local thermal distribution anomalies while achieving zero thermal damage overflow in the surrounding area, thus improving the overall processing yield.

A Ce-activated α-sialon phosphor having a luminescence peak in a wavelength range of 470 to 525 nm in a luminescence spectrum when excited by light having a wavelength of 405 nm, and a diffuse reflectance of light at the wavelength of the luminescence peak of 86.5% or more.

The invention relates to a method for characterizing a photovoltaic material, which comprises: - obtaining a luminescence spectrum (Dex) of a sample of the photovoltaic material; - determining a set of parameters that can be used to adjust a parametric model to the obtained spectrum; and - determining characteristics of the photovoltaic material based on the set of parameters. In this method, the parametric model (SFT) corresponds to the sum of at least two luminescence spectrum models (SF1, SF2).

This invention discloses a passive anti-phototaxis smart luminescent glasses based on spectral modulation, belonging to the field of optical optimization technology for smart wearable devices. The invention includes a glasses body, a light-emitting module, a main control module, and a power supply module. By uniquely limiting all nighttime luminescence spectra of the smart glasses to a continuous warm-colored broad spectrum of 480nm–650nm, fully covering the transition bands of pale yellow, yellow, orange, and warm red, it completely blocks the 300nm–500nm short-wavelength insect-attracting spectrum that nocturnal insects are highly sensitive to. Based on the principle of insect visual photosensitive blind spots, a passive spectral reconstruction technology is used to eliminate the insect-attracting properties of the smart glasses' nighttime luminescence from the source of light, inhibiting insect phototaxis and aggregation behavior. This invention breaks through the inherent technical biases of existing active insect repellent technologies, pioneering a spectrally limited passive anti-phototaxis solution. The technical solution is unique and significantly advanced, suitable for large-scale mass production, and does not limit the luminescent structure, position, or shape. All smart glasses using this warm-colored spectrum to achieve nighttime luminescence fall within the scope of this patent protection, maximizing the scope of protection and creating a strong patent barrier, possessing extremely high licensing value and promising industrial application prospects.

The invention provides a multifunctional magneto-optical spectrum testing system and method, a spectrum system is divided into an absorption spectrum and a luminescence spectrum, different polarization (or non-polarization) spectrums of absorption (or luminescence) can be divided by adjusting polarization (or non-polarization) and polarization forms (circular polarization or linear polarization) of a light path, an electromagnet is introduced into the light path, and the absorption spectrum and the luminescence spectrum can be separated into different polarization (or non-polarization) spectrums of absorption (or luminescence) by adjusting the polarization (or non-polarization) and the polarization forms (circular polarization or linear polarization) of the light path. The test requirement is met by regulating and controlling the size and direction of the magnetic field. According to the system and the method, a relatively wide test parameter adjustment range can be provided, each element in the system can be flexibly adjusted, the system is convenient to use and easy to implement, the accuracy of test data can be improved while high-efficiency test is provided, and the system and the method are suitable for scientific research and industrial application in the fields of various physics, chemistry, materials, chemical engineering and the like.

The application discloses a kind of multi-quantum well active region and preparation method thereof, including periodically grown multi-quantum well active layer;Single cycle of multi-quantum well active layer includes by sequentially stacking from bottom to top multi-quantum well active region well layer, multi-quantum well active region indium isolation layer, multi-quantum well active region cap layer, multi-quantum well active region interface processing layer and multi-quantum well active region barrier layer, to improve the overall light emitting uniformity of multi-quantum well active region, effectively reduce the half-width of light emitting spectrum, and inhibit blue shift phenomenon, obtain higher color purity, better stability light emitting spectrum.

The invention relates to a method for characterizing a photovoltaic material, comprising: obtaining a luminescence spectrum (Dex) of a sample of the photovoltaic material; determining a set of parameters for fitting a parametric model to the obtained spectrum; and determining the characteristics of the photovoltaic material from the parameter set. In this method, the parametric model (SFT) corresponds to the sum of at least two luminescence spectrum models (SF1, SF2). Figure 3 (for the abstract)

The invention provides a device and a system for detecting substances in liquid to be detected through plasma spectrum, the device comprises an electrode, at least one part of the electrode is suitable for being configured in the liquid to be detected and is suitable for being in contact with the liquid to be detected, the electrode is suitable for generating plasma in the liquid to be detected through external voltage, the plasma is located in bubbles generated by external voltage; and the light detection part is suitable for detecting a light-emitting spectrum generated by the plasma in the bubbles, the light detection part is an optical fiber, and no light condensing element is arranged between the light detection part and the plasma. According to the invention, when the to-be-detected liquid is subjected to external voltage to generate plasmas and bubbles, the luminescent spectrum signals of the plasmas can be effectively and completely collected, so that effective and accurate analysis and detection results of various substances in the to-be-detected liquid can be obtained.

This invention provides a light-emitting layer comprising: a TADF material, a phosphorescent material, a multi-resonance fluorescent material, and a host material. The addition of the phosphorescent material to the light-emitting layer enables it to receive triplet excitons, which can then be transferred to the singlet energy levels of the multi-resonance fluorescent material, reducing the number of triplet excitons within the device and improving its lifetime. The multi-resonance fluorescent material can convert triplet excitons into singlet excitons while receiving a small number, improving the device's efficiency. Due to the dual quenching effect of the phosphorescent material and the multi-resonance fluorescent material on the TADF material, the luminescence of the TADF material can be completely suppressed, improving the stability of the emission spectrum. This invention also provides a light-emitting device and a light-emitting apparatus.