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    • 2. 发明授权
    • Light emitting device and method for fabricating the same
    • 发光元件及其制造方法
    • US06982438B2
    • 2006-01-03
    • US10484408
    • 2002-07-24
    • Jun-ya Ishizaki
    • Jun-ya Ishizaki
    • H01L33/00
    • H01L33/28H01L21/0242H01L21/02472H01L21/02483H01L21/02554H01L21/02565H01L21/02576H01L21/02579H01L21/02584H01L21/0262H01L33/06
    • In a MgZnO layer composing an active layer or a p-type cladding layer 32, a p-type oxide layer 32b which is different from MgaZn1-aO-type oxide and has a p-type conductivity is disposed. Because a function of absorbing and compensating electrons in this configuration is owned by the p-type oxide layer localized in the MgZnO layer, it is no more necessary to add a large amount of dopant, and this is successful in obtaining a p-type or i-type MgaZn1-aO-type oxide having a desirable quality, and in realizing a high-emission-efficiency, light-emitting device capable of emitting ultraviolet or blue light. Adoption of a junction structure, in which at least either of the p-type cladding layer and the n-type cladding layer comprises a first crystal layer, and a second crystal layer which is hetero-bonded to the first crystal layer, and on the side thereof opposite to the active layer and has a band gap energy smaller than that of the first crystal layer, is successful in effectively injecting the carrier to the active layer, and consequently in raising the emission efficiency.
    • 在构成有源层或p型覆层32的MgZnO层中,与不同于Mg 1-a O 2的p型氧化物层32b 并且具有p型导电性。 由于在该构造中吸收和补偿电子的功能由位于MgZnO层中的p型氧化物层所拥有,所以不再需要添加大量的掺杂剂,这在获得p型或 具有期望质量的i型Mg 1 1-a O型氧化物,并且在实现能够发射紫外线的高发射效率的发光器件 或蓝光。 采用其中p型包覆层和n型包层中的至少任一个包括第一晶体层的结结构和与第一晶体层杂结的第二晶体层,并且在 具有与有源层相反的带隙能量小于第一晶体层的带隙能量,成功地将载体有效地注入到有源层,从而提高发光效率。
    • 4. 发明授权
    • Light-emitting device and method of fabricating the same
    • 发光元件及其制造方法
    • US07208755B2
    • 2007-04-24
    • US10550298
    • 2004-03-16
    • Jun-ya Ishizaki
    • Jun-ya Ishizaki
    • H01L29/06
    • H01L33/28
    • A light emitting device 1 has formed therein a light emitting layer section 24 based on a double heterostructure in which a p-type cladding layer 34, an active layer 33 and an n-type cladding layer 32, individually composed of a MgaZn1-aO (0≦a≦1) type oxide, are stacked in this order, and uses a face on the n-type cladding layer side as a light extraction surface. The device also has, as being provided on the main surface on the light extraction surface side of the n-type cladding layer 32, an n-type low resistivity layer 35 composed of a MgaZn1-aO type oxide, and having a content of an n-type dopant larger than that in the n-type cladding layer 32. There is thus provided a light emitting device of MgaZn1-aO-type oxide base, excellent in the light extraction efficiency, having the light emitting layer section composed of a MgaZn1-aO-type oxide, and a high conductivity MgZnO-base compound semiconductor layer disposed on the light extraction surface side.
    • 发光器件1在其中形成有基于双异质结构的发光层部分24,其中p型包覆层34,有源层33和n型包覆层32分别由Mg 一种Zn 1-a O(0 <= a <= 1)型氧化物按顺序层叠,并且使用n型包层侧的面作为光 提取面。 在n型包覆层32的光取出面侧的主表面上设置有由ZnSb Zn(SUB)构成的n型低电阻率层35, 并且具有大于n型包层32中的n型掺杂物的含量。 因此,提供了具有优异的光提取效率的具有优异的光提取效率的发光器件,其具有发光层部分由... MgZnO 1型氧化物,以及设置在光提取表面侧的高导电性MgZnO基化合物半导体层。
    • 7. 发明授权
    • Light emitting device and method of fabricating the same
    • 发光元件及其制造方法
    • US07091526B2
    • 2006-08-15
    • US10852256
    • 2004-05-25
    • Jun-ya Ishizaki
    • Jun-ya Ishizaki
    • H01L33/00
    • H01L33/44H01L33/28
    • A light emitting device 100 has a light emitting layer portion 9 which comprises an active layer 5 composed of an MgxZn1-xO-type oxide semiconductor, a p-type cladding layer 6 again composed of an MgxZn1-xO-type oxide semiconductor, and an n-type cladding layer 3. On the p-type cladding layer 6 of the light emitting layer portion 9, a light extraction layer 7 is configured using an oxide, where the light extraction layer 7 has a refractive index at a dominant emission wavelength of light extracted from the active layer 5 smaller than that of the cladding layers 3,6. This makes it possible to efficiently extract the light emitted from the light emitting layer portion 9 to the external of the light emitting device 100. This is it successful in providing a high-light-extraction-efficiency light emitting device having the light emitting layer portion composed of an oxide semiconductor, and a method of fabricating the same.
    • 发光器件100具有发光层部分9,该发光层部分9包括由Mg x Zn 1-x O O型氧化物半导体构成的有源层5, 再次由Mg x Zn 1-x O O型氧化物半导体构成的n型包覆层6和n型覆层3。 在发光层部分9的p型包覆层6上,使用氧化物构成光提取层7,其中光提取层7具有从有源层5提取的光的主发射波长的折射率 小于包层3,6的尺寸。 这使得可以有效地将从发光层部分9发射的光提取到发光器件100的外部。 这是成功地提供具有由氧化物半导体构成的发光层部分的高光提取效率的发光器件及其制造方法。