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90results about How to "Reduce reflection loss" patented technology

Light-emitting diode (LED) epitaxial structure and manufacturing method thereof

The invention discloses a light-emitting diode (LED) epitaxial structure and a manufacturing method thereof. The LED epitaxial structure successively comprises an epitaxial substrate, a leukotriene (LT)-GaN nucleating layer, a high-temperature non-doped buffer layer, a P-GaN layer, a P-AlGaN layer, a diffusion barrier layer, a multiple quantum well (MQW) luminous layer, an InGaN current expansion layer, an N-ZnO layer and a surface-coarsened ZnO layer. The manufacturing method comprises the following steps: pre-treating the epitaxial substrate; growing the nucleating layer; growing the buffer layer; growing the P-GaN layer; growing the P-AlGaN layer; growing the diffusion barrier layer; growing the MQW luminous layer; growing the InGaN current expansion layer; growing the N-ZnO layer; and growing the surface-coarsened ZnO layer. By using the LED epitaxial structure obtained by virtue of the manufacturing method provided by the invention, an excellent electrical property and a good optical property are obtained, the internal quantum efficiency and the electronic static discharge (ESD) resistance capability are improved, the lost light caused by total reflection is lowered, the external quantum efficiency is greatly improved, a high-brightness LED is obtained, and the purposes of development and sustainable development of the LED industry are greatly promoted.
Owner:中山大学佛山研究院 +1

Surface texturing technology for crystalline silicon solar cell

The invention discloses a surface texturing technology for a crystalline silicon solar cell. The surface texturing technology for the crystalline silicon solar cell comprises the following steps of (1), removing a mechanically damaged layer on the surface of a silicon chip through a sodium hydroxide solution with the concentration between 2 to 10 %; (2) mixing a silver nitrate solution with the concentration between 0.001 to 0.005 % and a hydrogen fluoride solution with the concentration between 0.2 to 1 % and depositing nano-silver particles from the mixed solution to the surface of the silicon chip; (3) mixing the hydrogen fluoride solution with the concentration between 10 to 15 % and a hydrogen peroxide solution with the concentration between 2 to 5 %, performing reaction between the mixed solution and the silicon chip with the nano-silver particles deposited and forming into holes in silicon chip positions around the nano-silver particles; (4) removing residual nano-silver particles inside the holes in the surface of the silicon chip through a dense nitric acid solution; (5) removing an oxide layer on the surface of the silicon layer through the hydrogen fluoride solution with the concentration between 5 to 10 %. The surface texturing technology for the crystalline silicon solar cell can reduce reflex losses and improve battery conversion efficiency.
Owner:TIANWEI NEW ENERGY HLDG

Ultrasonic damage-free checking focusing probe device

The invention discloses a focusing probe device of ultrasonic nondestructive detection used for detecting the defect of a detected sample, comprising a cylinder used for fixing the ultrasonic focusing probe; the ultrasonic focusing probe is connected with the big end of an inner cylinder in a sealing mode; the bottom end of the inner cylinder is encapsulated with a sound transmission film; a liquid medium used for transmission of the ultrasonic wave is arranged in the cylinder container of the inner cylinder; the inner cylinder provided with the probe is connected into a whole with an outer cylinder by thread in an adjustable mode; under the conditions of the same gain, the capability of detecting the defect of the sample is much better than a general straight probe; the water distance of the device leads the display distance of an initial wave, an interface wave, a defect wave and a bottom wave in the screen of a flaw detector to be pulled open and leads the area of the detected sample to be outside a triple near-field area of the ultrasonic wave on a beam axis, thus improving the resolution of waveform display and the detection sensitivity, leading the operation of finding and judging the defect wave in the process of detecting the defect to be convenient, saving a water tank and a water supply device and realizing field detection.
Owner:CHENGDU AIRCRAFT INDUSTRY GROUP

Mobile terminal and GPS and 3G single-antenna realizing device

The invention provides a GPS (Global Positioning System) and 3G (3rd-Generation) single-antenna realizing device which comprises a dual-resonant antenna used for receiving a radio frequency signal, a matching circuit which is connected with the dual-resonant antenna for obtaining the radio frequency signal and is used for performing signal matching processing on the radio frequency signal, and a diplexer, wherein the diplexer is connected with the matching circuit and is used for obtaining the radio frequency signal subjected to signal matching processing and sending the radio frequency signal subjected to separation processing respectively to a GPS module and a 3G diversity receiving module. The invention also provides a mobile terminal. Through the mode, according to the technical scheme disclosed by the invention, a GPS and 3G shared single antenna is realized by arranging the dual-resonant antenna, the matching circuit and the diplexer, so as to receive the signal; reflection loss and mismatch loss in the transmission process of the radio frequency signal are reduced; the transmission efficiency of the radio frequency signal is increased; the communication quality of the mobile terminal is enhanced; and the space of placing the antenna is not increased.
Owner:HUIZHOU TCL MOBILE COMM CO LTD

Frequency-multiplication crystal coupler for improving output efficiency of short-wave deep ultraviolet laser

The invention relates to a frequency-multiplication crystal coupler for improving the output efficiency of short-wave deep ultraviolet laser. The frequency-multiplication crystal coupler includes a first BaF2 crystal prism, a KBBF crystal and a second BaF2 crystal prism; the KBBF crystal is flat plate-shaped; the two BaF2 crystal prisms are respectively arranged at two side surfaces of the KBBF crystal; the top angles and bottom angles of the two BaF2 crystal prisms are adjacent to each other in pairs; the two BaF2 crystal prisms contact with optical cement at the two side surfaces of the KBBF crystal; the c-axis crystal orientation of the KBBF crystal is vertical to the contact surfaces of the two BaF2 crystal prisms and the KBBF crystal; the contact surfaces of the two BaF2 crystal prisms and the KBBF crystal, the two side surfaces of the KBBF crystal, a light beam entering surface and a light beam exiting surface are polished surfaces; light transmission directions are the crystal orientations of the two BaF2 crystal prisms, the intrinsic birefringence indexes of the two BaF2 crystal prisms in the crystal orientations being zero. With the frequency-multiplication crystal coupler adopted, reflection loss of the contact surfaces of the KBBF crystal and the BaF2 crystal prisms can be effectively decreased, and therefore, the conversion efficiency and output power of frequency-multiplied light can be improved.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI

Production process of crystalline silicon double-sided solar battery

InactiveCN102664217AEliminates thermal diffusion stepLeave out the edgeFinal product manufactureSemiconductor devicesTrappingOptoelectronics
The invention relates to a production process of a crystalline silicon double-sided solar battery, comprising the following steps of: etching to enable a silicon substrate to have an etched face; manufacturing a window which accords with an electrode pattern on a backlight face of the silicon substrate; carrying out heat treatment on the silicon substrate to form a PN junction in the window; washing the silicon substrate; plating at least two layers of antireflection films on a light reflective face of the silicon substrate; plating the antireflection film on a backlight face of the silicon substrate; printing electrode slurry on a silk screen; and sintering to obtain a metal electrode so as to finish the manufacturing of a battery cell. The production process disclosed by the invention is ingenious in concept, is compatible with a conventional industrial battery production line and is easy for industrial manufacture; compared with the conventional solar battery, an electrode grid line is not arranged on the light reflective face of the double-sided solar battery so as to prevent the electrode grid line of the light reflective face from shielding sunlight; the backlight face is provided with a light trapping structure and an antireflection film layer so that the backlight face of the battery also can absorb and utilize the sunlight; and the antireflection films of the light reflective face and the backlight face can passivate the solar battery, so as to be good for improving the efficiency of the battery.
Owner:杨正刚
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