Electrode spacing effect on ultraviolet photoconductivity of metal-semiconductor-metal detectors with ZnO nanorod arrays grown by hydrothermal method

被引：0
作者：
Lin C.-M. [1 ]
Hsu Y.-C. [2 ]
Hung S.-C. [3 ]
Li Y.-M. [4 ]
机构：
[1] Department of Applied Science, National Taitung University, Taitung
[2] Department of Biometranics Engineering, National Pingtung University of Science and Technology, Pingtung
[3] Department of Information Technology and Communication, Shih Chien University, Kaohsiung Campus, No. 200, University RD, Neimen, Kaohsiung
[4] Institute of Photonics and Communications, National Kaohsiung University of Applied Sciences, Kaohsiung
来源：
Hung, Shang-Chao (schung99@gmail.com) | 2016年 / M Y U Scientific Publishing Division卷 / 28期
关键词：
Hydrothermal method; Photodetectors; ZnO;
D O I：
10.18494/SAM.2016.1209
中图分类号：
学科分类号：
摘要：
In this work, ZnO nanorod (NR) arrays were grown by a hydrothermal method on a ZnO seed-layer-precoated Si (100) substrate. The average diameter and length of the obtained ZnO NRs with a high aspect ratio of 33 are 50 nm and 1.65 μm, respectively. Ultraviolet (UV) metal-semiconductor-metal photodetectors (PDs) were fabricated by plating Au interdigitated electrodes with inger spacings of 100 and 200 μm on the ZnO NR arrays. Illumination and electrode areas were half of the same work area for the two PDs. All measured current-to-voltage curves under UV illumination at 380 nm and in the dark show ohmic contact nature at the interface between Au metal and ZnO NR arrays. Here, the PD with 100 μm inger spacing presented a high photo-to-dark current ratio of 258.2 at 1.0 V bias, and its optical responsivity at 380 nm was about two orders of magnitude larger than that at 450 nm with bias ranging from 0.1 to 5.0 V. © MYU K.K.
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页码：561 / 567
页数：6
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