High efficiency tandem solar cells on silicon substrates using ultra thin germanium buffer layers
    2.
    发明申请
    High efficiency tandem solar cells on silicon substrates using ultra thin germanium buffer layers 审中-公开
    使用超薄锗缓冲层的硅衬底上的高效串联太阳能电池

    公开(公告)号:US20050081910A1

    公开(公告)日:2005-04-21

    申请号:US10922420

    申请日:2004-08-20

    IPC分类号: H01L31/00 H01L31/068

    CPC分类号: H01L31/0687 Y02E10/544

    摘要: A system is disclosed for providing electrical power responsive to solar energy. The system includes a Si cell, an AlGaAs cell, and a Ge cell. The Si cell is for providing electrical power responsive to solar energy within a first frequency range. The AlGaAs cell is coupled to a first side of the Si cell, and is for providing electrical power responsive to solar energy within a second frequency range. The Ge cell is coupled to a second side of the Si cell, and the Ge cell provides electrical power responsive to solar energy within a third frequency range.

    摘要翻译: 公开了一种用于提供响应于太阳能的电力的系统。 该系统包括Si电池,AlGaAs电池和Ge电池。 Si电池用于响应于第一频率范围内的太阳能提供电力。 AlGaAs单元耦合到Si单元的第一侧,并且用于在第二频率范围内响应于太阳能提供电功率。 Ge单元耦合到Si单元的第二侧,并且Ge单元提供响应于第三频率范围内的太阳能的电功率。

    Ge photodetectors
    4.
    发明申请
    Ge photodetectors 有权
    Ge光电探测器

    公开(公告)号:US20060022226A1

    公开(公告)日:2006-02-02

    申请号:US11191769

    申请日:2005-07-28

    IPC分类号: H01L27/148

    摘要: A phototransistor includes an emitter and a base that comprises Ge. A collector comprises Si. The base, emitter, and collector form at least one Si/Ge heterojunction allowing the unpinning of Fermi energy level (EF) of the phototransistor.

    摘要翻译: 光电晶体管包括发射极和包含Ge的基极。 收集器包括Si。 基极,发射极和集电极形成至少一个Si / Ge异质结,允许去除光电晶体管的费米能级(E> F)。

    Multiple oxidation smoothing method for reducing silicon waveguide roughness
    5.
    发明申请
    Multiple oxidation smoothing method for reducing silicon waveguide roughness 有权
    减少硅波导粗糙度的多重氧化平滑法

    公开(公告)号:US20050013575A1

    公开(公告)日:2005-01-20

    申请号:US10869636

    申请日:2004-06-16

    摘要: The light-guiding structure includes a waveguide structure that comprises a substrate and a low refractive index underclad material. The waveguide structure is oxidized to form an oxidized layer on a surface of the waveguide structure. The oxidized layer is isotropically etched after the reaction-limited oxidation regime is approaching the diffusion-limited regime and repeatedly oxidized and etched so that the waveguide structure is continuously oxidized in the reaction-limited regime, reducing the overall time of oxidation and volume of oxidized material so that the waveguide structure has its sidewall roughness reduced efficiently enabling high transmission rates of guided light.

    摘要翻译: 导光结构包括波导结构,其包括基底和低折射率底层材料。 波导结构被氧化以在波导结构的表面上形成氧化层。 在反应限制氧化态接近扩散限制状态后,氧化层进行各向同性蚀刻,并被反复氧化和蚀刻,使得波导结构在反应限制状态下连续氧化,减少氧化的总时间和氧化的体积 材料,使得波导结构的侧壁粗糙度有效降低,导致导光的高透射率。

    Optical grating coupler
    6.
    发明申请
    Optical grating coupler 有权
    光栅耦合器

    公开(公告)号:US20060233505A1

    公开(公告)日:2006-10-19

    申请号:US11444541

    申请日:2006-05-31

    IPC分类号: G02B6/10

    CPC分类号: G02B6/124 G02B6/42

    摘要: An optical grating is disposed on a waveguide to redirect light from the interior of the waveguide through the opposite side of the waveguide from the grating. In one embodiment the waveguide, the grating, and an optical sensor are combined in a single monolithic structure. In another embodiment, an absorbing layer is directly connected to the waveguide in the region of the grating. In still another embodiment, efficiency of the grating is improved by having a high index contrast between the refractive index of the grating and the refractive index of the cladding disposed over the grating, and by having an appropriately sized discontinuity in the grating.

    摘要翻译: 光波导设置在波导上,以将来自波导内部的光通过波导的与光栅相反的一侧引导。 在一个实施例中,波导,光栅和光学传感器被组合成单个整体结构。 在另一个实施例中,吸收层在光栅的区域中直接连接到波导。 在另一个实施例中,通过在光栅的折射率和设置在光栅上的包层的折射率之间具有高折射率对比度,以及通过在光栅中具有适当尺寸的不连续性来提高光栅的效率。