Visible-light photodetector with enhanced performance based on a ZnO@CdS heterostructure
Visible-light photodetector with enhanced performance based on a ZnO@CdS heterostructure
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DOI：
10.1039/c4tc02890b
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发表时间：
2015-02
影响因子：
6.4
通讯作者：
Linghui Zhu;C. Li;Yujia Li;Caihui Feng;Feng Li;Dezhong Zhang;Zhanguo Chen;Shanpeng Wen;S. Ruan
中科院分区：
文献类型：
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作者：
Linghui Zhu;C. Li;Yujia Li;Caihui Feng;Feng Li;Dezhong Zhang;Zhanguo Chen;Shanpeng Wen;S. Ruan
在本文中，通过简单的两步溶剂热法成功合成了单晶 CdS 纳米线上的 ZnO 颗粒异质结构（ZnO@CdS）。介绍了 ZnO@CdS 异质结构作为可见光光电探测器（PD）的引人注目的应用。与基于原始 CdS 纳米线的探测器相比，基于结构优化的 ZnO@CdS 纳米材料的光子探测器的光（短于 510 nm）照射的光电流与暗电流的比率显着增强。讨论了该现象的相应机制。此外，还进行了时间分辨响应的测量。基于 ZnO@CdS 异质结构的器件在辐照时保持快速上升（5 毫秒）和衰减（10 毫秒）速度。这项工作展示了基于 ZnO@CdS 异质结构的可见光探测器的应用前景，该探测器具有高光电流/暗电流比、超快时间响应和非常好的稳定性。
In this article, the heterostructure of ZnO particles on single-crystal CdS nanowires (ZnO@CdS) has been successfully synthesized via a facile two-step solvothermal process. The appealing application of the ZnO@CdS heterostructure as visible-light photodetector (PD) is presented. Photocurrent illuminated with light (shorter than 510 nm) to dark-current ratio of structurally-optimized ZnO@CdS nanomaterials based photon detector was enhanced significantly compared to the value of the pristine CdS nanowires based one. The corresponding mechanism for the phenomenon was discussed. Additionally, measurements of time resolved responses were conducted. The ZnO@CdS heterostructure based device kept a fast rise (5 ms) and decay (10 ms) speed to irradiation. This work demonstrates a promising application of ZnO@CdS heterostructure based visible-light detectors with high photocurrent/dark-current ratio, ultrafast time response and very good stability.