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首页> 外文期刊>Advanced Functional Materials >An Efficient Way to Assemble ZnS Nanobelts as Ultraviolet-Light Sensors with Enhanced Photocurrent and Stability
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An Efficient Way to Assemble ZnS Nanobelts as Ultraviolet-Light Sensors with Enhanced Photocurrent and Stability

机译：组装ZnS纳米带作为具有增强的光电流和稳定性的紫外线传感器的有效方法

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摘要

Although there has been significant progress in the fabrication and performance optimization of one-dimensional nanostructure-based photodetectors, it is still a challenge to develop an effective and low-cost device with high performance characteristics, such as a high photocurrent/ dark-current ratio, photocurrent stability, and fast time response. Herein an efficient and low-cost method to achieve high-performance 'visible-blind' microscale ZnS nanobelt-based ultraviolet (UV)-light sensors without using a lithography technique, by increasing the nanobelt surface areas exposed to light, is reported. The devices exhibit about 750 times enhancement of a photocurrent compared with individual nanobelt-based sensors and an ultrafast time response. The photocurrent stability and time response to UV-light do not change significantly when a channel distance is altered from 2 to 100 μm or the sensor environment changes from air to vacuum and different measurement temperatures (60 and 150℃). The photoelectrical behaviors can be recovered well after returning the measurement conditions to air and room temperature again. The low cost and high performance of the resultant ZnS nanobelt photodetectors guarantee their highest potential for visible-blind UV-light sensors working in the UV-A band.
机译：尽管在基于一维纳米结构的光电探测器的制造和性能优化方面已取得重大进展，但开发具有高性能特性（例如高光电流/暗电流比）的有效且低成本的设备仍然是一个挑战，光电流稳定性和快速的时间响应。本文报道了通过增加暴露于光下的纳米带表面积而无需使用光刻技术即可实现高性能“可见盲”微米级ZnS纳米带基紫外（UV）光传感器的高效低成本方法。与单个基于纳米带的传感器相比，该器件的光电流增强了约750倍，并且具有超快的时间响应。当通道距离从2更改为100μm或传感器环境从空气变为真空以及不同的测量温度（60和150℃）时，光电流稳定性和对紫外线的时间响应不会显着变化。将测量条件再次恢复到空气和室温后，可以很好地恢复光电性能。所得到的ZnS纳米带光电探测器的低成本和高性能保证了它们在工作于UV-A波段的可见盲UV光传感器的最大潜力。

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  • 来源
    《Advanced Functional Materials》 |2010年第3期|500-508|共9页
  • 作者

    Xiaosheng Fang; Yoshio Bando; Meiyong Liao; Tianyou Zhai; Ujjal K. Goutam; Liang Li; Yasuo Koide; Dmitri Golberg;

  • 作者单位

    International Center for Young Scientists (ICYS) and International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan);

    International Center for Young Scientists (ICYS) and International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan);

    Sensor Materials Center, NIMS Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan);

    International Center for Young Scientists (ICYS) and International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan);

    International Center for Young Scientists (ICYS) and International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan);

    International Center for Young Scientists (ICYS) and International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan);

    Sensor Materials Center, NIMS Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan);

    International Center for Young Scientists (ICYS) and International Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan);

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