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首页> 外文期刊>Advanced Functional Materials >Position-Sensitive Array Photodetector Based on Comb-Like CdS Nanostructure with Cone-Shape Branches
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Position-Sensitive Array Photodetector Based on Comb-Like CdS Nanostructure with Cone-Shape Branches

机译：基于具有锥状分支的梳状CdS纳米结构的位置敏感阵列光电探测器

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摘要

2D microscale position-sensitive detectors (PSDs) are highly desirable with the degree of integration increase and the size reduction of nanodevices, which are still unavailable. Multichannel devices with outstanding photoelectric properties attract considerable interest as powerful building blocks to be applied in on-chip systems. Here, based on a highly ordered comb-like CdS nanowire array with cone-shape branches through a one-step synthesis strategy, a high-resolution 2D position-sensitive photodetector is realized through variable resistance in different transportation routes and variable optical responses at different parts of the cone-shape branches, which enable accurate position identification of incident light in various zones of nanowire arrays according to photocurrent changes. In a broadband from 310 to 560 nm, the PSD exhibits high sensitivity with 85 and 58 K omega mu m(-1) in the trunk and branch part, respectively, and an ultrafast optical response shorter than tens of millisecond. Moreover, a lower conductivity change rate per unit temperature of the PSD (1.625 x 10(-9) A V-1 K-1) than that of commercial Si-based PSDs (approximate to 6.67 x 10(-7) A V-1 K-1) reveals outstanding low-temperature performance. Finally, the multichannel nanostructure based PSD with nanoscale resolution is applied to high-accuracy quadrant photodetectors.
机译：随着纳米器件的集成度的提高和尺寸的减小，二维微尺度位置敏感检测器（PSD）是非常需要的，而纳米器件仍然无法获得。具有出色光电性能的多通道器件吸引了人们的广泛关注，因为它们将被应用在片上系统中。在此，通过一步合成策略，基于具有锥形分支的高阶梳状CdS纳米线阵列，通过不同运输路径中的可变电阻和不同位置的可变光学响应，实现了高分辨率的二维位置敏感光电探测器。锥形分支的一部分，可以根据光电流变化准确识别纳米线阵列各个区域中入射光的位置。在310到560 nm的宽带中，PSD分别在树干和分支部分分别具有85和58 KΩμm（-1）的高灵敏度，并且短于数十毫秒的超快光学响应。此外，PSD的每单位温度的电导率变化率（1.625 x 10（-9）A V-1 K-1）比市售的基于Si的PSD的电导率变化率低（约6.67 x 10（-7）A V- 1 K-1）显示出出色的低温性能。最后，将具有纳米级分辨率的基于多通道纳米结构的PSD应用于高精度象限光电探测器。

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  • 来源
    《Advanced Functional Materials》 |2019年第1期|1805967.1-1805967.7|共7页
  • 作者

    Hao Yan; Guo Shuai; Weller Dieter; Zhang Min; Ding Chunjie; Chai Ke; Xie Lingling; Liu Ruibin;

  • 作者单位

    Beijing Inst Technol, Sch Phys, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Beijing 100081, Peoples R China;

    Beijing Inst Technol, Sch Phys, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Beijing 100081, Peoples R China;

    Univ Duisburg Essen, Fac Phys, Lotharstr 1, D-47057 Duisburg, Germany|Univ Duisburg Essen, Ctr Nanointegrat CENIDE, Lotharstr 1, D-47057 Duisburg, Germany;

    Beijing Inst Technol, Sch Phys, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Beijing 100081, Peoples R China;

    Beijing Inst Technol, Sch Phys, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Beijing 100081, Peoples R China;

    Beijing Inst Technol, Sch Phys, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Beijing 100081, Peoples R China;

    Beijing Inst Technol, Sch Phys, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Beijing 100081, Peoples R China;

    Beijing Inst Technol, Sch Phys, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Beijing 100081, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    disbranched nanostructures; nanosized PSD; position-sensitive photodetectors (PSD); quadrant photodetectors;

    机译：分散的纳米结构;纳米PSD;位置敏感光电探测器（PSD）;象限光电探测器;

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