Broad band light detection : Amorphous ZnO nanosensor
Yen-Ting You1*, Ting-Yi Lin2, Chun-Yen Lai1, Ping-Hung Yeh1
1Department of Physics, Tamkang University, New Taipei City, Taiwan
2Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu city, Taiwan
* presenting author:游晏婷,
In this work, the amorphous ZnO (a-ZnO) nanowire (NW) was spontaneous grown from the crystalline ZnO (c-ZnO) NW by humidity controlling. The spontaneous growth mechanism of a-ZnO NW is due to the interaction between water molecules and surface dangling bonds. The a-ZnO NW device has outstanding sensitivity for UV light detection, the sensitivity is around 600, which is two order larger than c-ZnO NW device. The response/reset time of a-ZnO NW device is 20 ms (the detection limit of equiptment) , which is also two order faster than c-ZnO NW device. Furthermore, the brodband light can be detected by using a-ZnO NW device, such as 365, 520, 590, 740, 840 and 940nm light.

Keywords: defect, amorphous, photon detection