摘要:
A method for producing an optically stimulated luminescene (OSL) dosage detection crystal is disclosed, where an Al2O3 is first covered with carbon. The carbon atoms are diffused then in vacuum into the Al2O3 lattices. Then, the oxygen and carbon atoms react with each other in an anneal process under 1 atm. At this time, oxygen and the carbon atoms are enabled to react with each other, and thus C+O result in CO, or C+O2 form CO2, so that oxygen vacancy deficiencies are formed in the Al2O3 crystal. At this time, a uniformly carbon distributed crystal structure is thus simply obtained.
摘要翻译:公开了一种用于制备光学刺激的发光(OSL)剂量检测晶体的方法,其中首先用碳覆盖Al 2 O 3。 碳原子在真空中扩散到Al2O3晶格中。 然后,在1atm以下的退火工艺中,氧和碳原子相互反应。 此时,氧和碳原子能够彼此反应,因此C + O导致CO或C + O 2形成CO 2,从而在Al 2 O 3晶体中形成氧空位缺陷。 此时,简单地获得均匀的碳分布晶体结构。
摘要:
A detector using scintillating crystals is provided. The scintillating crystal is based on cerium doped lutetium yttrium orthosilicate (Ce:LYSO). With calcium (Ca) doped into Ce:LYSO, the electrovalence of Ce is further uniformly distributed. The scintillating crystal obtains high stability with 2 to 10 times greater electrical degree than that of a general scintillating crystal. Thus, radiative induction to cancer cells is improved and distribution of the cancer cells is easily figured out.
摘要:
A detector using scintillating crystals is provided. The scintillating crystal is based on cerium doped lutetium yttrium orthosilicate (Ce:LYSO). With calcium (Ca) doped into Ce:LYSO, the electrovalence of Ce is further uniformly distributed. The scintillating crystal obtains high stability with 2 to 10 times greater electrical degree than that of a general scintillating crystal. Thus, radiative induction to cancer cells is improved and distribution of the cancer cells is easily figured out.
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.
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 method for making a free-standing, single crystal, gallium nitride (GaN) wafer includes forming a single crystal GaN layer directly on a single crystal LiAlO2 substrate using a gallium halide reactant gas, and removing the single crystal LiAlO2 substrate from the single crystal GaN layer to make the free-standing, single crystal GaN wafer. Forming the single crystal GaN layer may comprise depositing GaN by vapor phase epitaxy (VPE) using the gallium halide reactant gas and a nitrogen-containing reactant gas. Because gallium halide is used as a reactant gas rather than a metal organic reactant such as trimethygallium (TMG), the growth of the GaN layer can be performed using VPE which provides commercially acceptable rapid growth rates. In addition, the GaN layer is also devoid of carbon throughout. Because the GaN layer produced is high quality single crystal, it may have a defect density of less than about 107 cm−2.
摘要:
A method for making a free-standing, single crystal, aluminum gallium nitride (AlGaN) wafer includes forming a single crystal AlGaN layer directly on a single crystal LiAlO2 substrate using an aluminum halide reactant gas, a gallium halide reactant gas, and removing the single crystal LiAlO2 substrate from the single crystal AlGaN layer to make the free-standing, single crystal AlGaN wafer. Forming the single crystal AlGaN layer may comprise depositing AlGaN by vapor phase epitaxy (VPE) using aluminum and gallium halide reactant gases and a nitrogen-containing reactant gas. The growth of the AlGaN layer using VPE provides commercially acceptable rapid growth rates. In addition, the AlGaN layer can be devoid of carbon throughout. Because the AlGaN layer produced is high quality single crystal, it may have a defect density of less than about 107cm−2.
摘要:
A method for making a free-standing, single crystal, aluminum gallium nitride (AlGaN) wafer includes forming a single crystal AlGaN layer directly on a single crystal LiAlO2 substrate using an aluminum halide reactant gas, a gallium halide reactant gas, and removing the single crystal LiAlO2 substrate from the single crystal AlGaN layer to make the free-standing, single crystal AlGaN wafer. Forming the single crystal AlGaN layer may comprise depositing AlGaN by vapor phase epitaxy (VPE) using aluminum and gallium halide reactant gases and a nitrogen-containing reactant gas. The growth of the AlGaN layer using VPE provides commercially acceptable rapid growth rates. In addition, the AlGaN layer can be devoid of carbon throughout. Because the AlGaN layer produced is high quality single crystal, it may have a defect density of less than about 107 cm−2.
摘要翻译:制造独立的单晶,氮化镓铝(AlGaN)晶片的方法包括:使用卤化铝反应物气体,镓(AlGaN)形成直接在单晶LiAl 2 O 3衬底上的单晶AlGaN层 卤化物反应物气体,并从单晶AlGaN层除去单晶LiAlO 2衬底以制造独立的单晶AlGaN晶片。 形成单晶AlGaN层可以包括使用铝和卤化镓反应物气体和含氮反应气体通过气相外延(VPE)沉积AlGaN。 使用VPE的AlGaN层的生长提供商业上可接受的快速生长速率。 此外,AlGaN层整体上不含碳。 因为所生产的AlGaN层是高质量的单晶,所以它的缺陷密度可能小于约10 -7 cm -2。
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:
The present invention polishes a lithium aluminum oxide (LiAlo2) crystal several times with three different materials and then the LiAlo2 crystal are soaked into an acid solution to be washed for obtaining a LiAlo2 crystal of film-free, scratch-free with smooth surface.
摘要翻译:本发明用三种不同的材料将锂铝氧化物(LiAl 2 O 3)晶体抛光数次,然后将LiAl 2 Cl 2晶体浸泡在酸洗液中以得到 无光泽的LiAlo 2< 2>晶体,无光滑,表面光滑。