摘要:
The present invention is a light emitting device which uses a specific phosphor powder. The phosphor powder is a combination of cerium (Ce) and lithium aluminum oxide (LiAlO2). They are mixed under a specific range of composition ratio. With the specific phosphor powder applied, the light emitting device has advantages in a low cost, a reduced power consumption, an easy production, a long life, and so on. In addition, a transformation efficiency of the phosphor powder is high and so a light emitting efficiency of the light emitting device is enhanced.
摘要:
A thick gallium nitride (GaN) film is formed on a LiAlO2 substrate through two stages. First, GaN nanorods are formed on the LiAlO2 substrate through chemical vapor deposition (CVD). Then the thick GaN film is formed through hydride vapor phase epitaxy (HVPE) by using the GaN nanorods as nucleus sites. In this way, a quantum confined stark effect (QCSE) becomes small and a problem of spreading lithium element into gaps in GaN on using the LiAlO2 substrate is mended.
摘要:
A lithium aluminum oxide (LiAlO2) substrate suitable for a zinc oxide (ZnO) buffer layer is found. The ZnO buffer layer is grown on the LiAlO2 substrate. Because the LiAlO2 substrate has a similar structure to that of the ZnO buffer layer, a quantum confined stark effect (QCSE) is effectively eliminated. And a photoelectrical device made with the present invention, like a light emitting diode, a piezoelectric material or a laser diode, thus obtains an enhanced light emitting efficiency.
摘要翻译:发现适用于氧化锌(ZnO)缓冲层的氧化锂铝(LiAlO 2 N 2)衬底。 ZnO缓冲层在LiAlO 2衬底上生长。 由于LiAlO 2衬底具有与ZnO缓冲层类似的结构,因此有效地消除了量子限制的Stark效应(QCSE)。 并且,通过本发明制造的光电器件,如发光二极管,压电材料或激光二极管,从而获得增强的发光效率。
摘要:
The invention provides a method of manufacturing a composite wafer structure. In particular, the method, according to the invention, is based on the fracture mechanics theory to actively control fracture induced during the manufacture of the composite wafer structure and to further protect from undesired edge damage. Thereby, the method, according to the invention, can enhance the yield rate of industrial mass production regarding the composite wafer structure.
摘要:
A crystalline silicon ingot and a method of fabricating the same are provided. The method utilizes a nucleation promotion layer to facilitate a plurality of silicon grains to nucleate on the nucleation promotion layer from a silicon melt and grow in a vertical direction into silicon grains until the silicon melt is completely solidified. The increment rate of defect density in the silicon ingot along the vertical direction has a range of 0.01%/mm˜10%/mm.
摘要:
A crystalline silicon ingot and a method of fabricating the same are disclosed. The crystalline silicon ingot of the invention includes multiple silicon crystal grains growing in a vertical direction of the crystalline silicon ingot. The crystalline silicon ingot has a bottom with a silicon crystal grain having a first average crystal grain size of less than about 12 mm. The crystalline silicon ingot has an upper portion, which is about 250 mm away from said bottom, with a silicon crystal grain having a second average crystal grain size of greater than about 14 mm.
摘要:
A light emitting diode (LED) substrate including a sapphire substrate is provided. The sapphire substrate has a surface consisting of a plurality of upper trigonal and lower hexagonal tapers, wherein each of the upper trigonal and lower hexagonal tapers is consisted of a hexagonal taper and a trigonal taper on the hexagonal taper, and a pitch of the upper trigonal and lower hexagonal tapers is less than 10 μm. This LED substrate has high light-emitting efficiency.
摘要:
An approach is provided for a method to manufacture a crystalline silicon ingot. The method comprises providing a mold formed for melting and cooling a silicon feedstock by using a directional solidification process, disposing a barrier layer inside the mold, disposing one or more silicon crystal seeds on the barrier layer, loading the silicon feedstock on the silicon crystal seeds, heating the mold to obtain a silicon melt, and cooling the mold by the directional solidification process to solidify the silicon melt into a silicon ingot. The mold is heated until the silicon feedstock is fully melted and the silicon crystal seeds are at least partially melted.
摘要:
The present invention discloses a method of manufacturing a solar cell by forming two electrode layers on the same side of a wafer, and avoiding sunlight incident to another side from being blocked by the electrode layers to enhance the photoelectric conversion efficiency, and each electrode layer is formed by using a mask layer to perform a vapor deposition process, without requiring any mask lithography or etching process. Of course, the issue of a high-temperature process that deteriorates the quality of the wafer no longer exists.
摘要:
A light emitting diode (LED) is made. The LED had a LiAlO2 substrate and a GaN layer. Between them, there is a zinc oxide (ZnO) layer. Because GaN and ZnO have a similar. Wurtzite structure, GaN can easily grow on ZnO. By using the ZnO layer, the GaN layer is successfully grown as a single crystal thin film on the LiAlO2 substrate. Thus, GaN defect density is reduced and lattice match is obtained to have a good crystal interface quality and an enhanced light emitting efficiency of a device thus made.