Uniform multilayer graphene by chemical vapor deposition

    公开(公告)号:US10886126B2

    公开(公告)日:2021-01-05

    申请号:US13225135

    申请日:2011-09-02

    摘要: A method of producing uniform multilayer graphene by chemical vapor deposition (CVD) is provided. The method is limited in size only by CVD reaction chamber size and is scalable to produce multilayer graphene films on a wafer scale that have the same number of layers of graphene throughout substantially the entire film. Uniform bilayer graphene may be produced using a method that does not require assembly of independently produced single layer graphene. The method includes a CVD process wherein a reaction gas is flowed in the chamber at a relatively low pressure compared to conventional processes and the temperature in the reaction chamber is thereafter decreased relatively slowly compared to conventional processes. One application for uniform multilayer graphene is transparent conductors. In processes that require multiple transfers of single layer graphene to achieve multilayer graphene structures, the disclosed method can reduce the number of process steps by at least half.

    UNIFORM MULTILAYER GRAPHENE BY CHEMICAL VAPOR DEPOSITION
    2.
    发明申请
    UNIFORM MULTILAYER GRAPHENE BY CHEMICAL VAPOR DEPOSITION 审中-公开
    通过化学蒸气沉积法制成均匀的多层石墨

    公开(公告)号:US20120225296A1

    公开(公告)日:2012-09-06

    申请号:US13225135

    申请日:2011-09-02

    摘要: A method of producing uniform multilayer graphene by chemical vapor deposition (CVD) is provided. The method is limited in size only by CVD reaction chamber size and is scalable to produce multilayer graphene films on a wafer scale that have the same number of layers of graphene throughout substantially the entire film. Uniform bilayer graphene may be produced using a method that does not require assembly of independently produced single layer graphene. The method includes a CVD process wherein a reaction gas is flowed in the chamber at a relatively low pressure compared to conventional processes and the temperature in the reaction chamber is thereafter decreased relatively slowly compared to conventional processes. One application for uniform multilayer graphene is transparent conductors. In processes that require multiple transfers of single layer graphene to achieve multilayer graphene structures, the disclosed method can reduce the number of process steps by at least half.

    摘要翻译: 提供了通过化学气相沉积(CVD)制造均匀的多层石墨烯的方法。 该方法仅通过CVD反应室尺寸限制,并且可扩展以在基片上生产具有相同数量的石墨烯层的多晶石墨烯薄膜。 可以使用不需要组装独立生产的单层石墨烯的方法来生产均匀的双层石墨烯。 该方法包括CVD方法,其中与常规方法相比,反应气体在相对低的压力下在室中流动,然后与常规方法相比,反应室中的温度相对较慢地降低。 均匀多层石墨烯的一个应用是透明导体。 在需要多次转移单层石墨烯以实现多层石墨烯结构的方法中,所公开的方法可以将工艺步骤的数量减少至少一半。

    CARBON NANOTUBE HYBRID PHOTOVOLTAICS
    5.
    发明申请
    CARBON NANOTUBE HYBRID PHOTOVOLTAICS 有权
    碳纳米管混合光伏

    公开(公告)号:US20120007046A1

    公开(公告)日:2012-01-12

    申请号:US13179885

    申请日:2011-07-11

    摘要: Systems, methods and devices for the efficient photocurrent generation in single- or multi-walled carbon nanotubes, which includes (SWNTs)/poly [3-hexylthiophene-2,5-diyl] (P3HT) hybrid photovoltaics, and exhibit the following features: photocurrent measurement at individual SWNT/P3HT heterojunctions indicate that both semiconducting (s-) and metallic (m-) SWNTs function as excellent hole acceptors; electrical transport and gate voltage dependent photocurrent indicate that P3HT p-dopes both s-SWNT and m-SWNT, and exciton dissociation is driven by a built-in voltage at the heterojunction. Some embodiments include a mm2 scale SWNT/P3HT bilayer hybrid photovoltaics using horizontally aligned SWNT arrays, which exhibit greater than 90% effective external quantum efficiency, among other things, which advantageously provide carbon nanomaterial based low cost and high efficiency hybrid photovoltaics.

    摘要翻译: 包括(SWNTs)/聚[3-己基噻吩-2,5-二基](P3HT)混合光伏在单壁或多壁碳纳米管中有效的光电流产生的系统,方法和装置,并且具有以下特征: 单个SWNT / P3HT异质结的光电流测量表明半导体(s-)和金属(m-)SWNTs都用作优异的空穴受体; 电传输和栅极电压依赖光电流表明P3HT p掺杂s-SWNT和m-SWNT,并且激子解离由异质结内的电压驱动。 一些实施例包括使用水平对准的SWNT阵列的mm2尺度的SWNT / P3HT双层混合光伏,其显示出大于90%的有效外部量子效率,其有利地提供基于碳纳米材料的低成本和高效率混合光伏。

    Carbon nanotube hybrid photovoltaics
    8.
    发明授权
    Carbon nanotube hybrid photovoltaics 有权
    碳纳米管混合光伏

    公开(公告)号:US08502195B2

    公开(公告)日:2013-08-06

    申请号:US13179885

    申请日:2011-07-11

    IPC分类号: H01L29/06

    摘要: Systems, methods and devices for the efficient photocurrent generation in single- or multi-walled carbon nanotubes, which includes (SWNTs)/poly [3-hexylthiophene-2,5-diyl] (P3HT) hybrid photovoltaics, and exhibit the following features: photocurrent measurement at individual SWNT/P3HT heterojunctions indicate that both semiconducting (s-) and metallic (m-) SWNTs function as excellent hole acceptors; electrical transport and gate voltage dependent photocurrent indicate that P3HT p-dopes both s-SWNT and m-SWNT, and exciton dissociation is driven by a built-in voltage at the heterojunction. Some embodiments include a mm2 scale SWNT/P3HT bilayer hybrid photovoltaics using horizontally aligned SWNT arrays, which exhibit greater than 90% effective external quantum efficiency, among other things, which advantageously provide carbon nanomaterial based low cost and high efficiency hybrid photovoltaics.

    摘要翻译: 包括(SWNTs)/聚[3-己基噻吩-2,5-二基](P3HT)混合光伏在单壁或多壁碳纳米管中有效的光电流产生的系统,方法和装置,并且具有以下特征: 单个SWNT / P3HT异质结的光电流测量表明半导体(s-)和金属(m-)SWNTs都用作优异的空穴受体; 电传输和栅极电压依赖光电流表明P3HT p掺杂s-SWNT和m-SWNT,并且激子解离由异质结内的电压驱动。 一些实施例包括使用水平对准的SWNT阵列的mm2尺度的SWNT / P3HT双层混合光伏,其显示出大于90%的有效外部量子效率,其有利地提供基于碳纳米材料的低成本和高效率混合光伏。