Ultraviolet photodetectors based on MgZnO thin film grown by RF magnetron sputtering

Jr Shiang Shiau, Sanjaya Brahma, Chuan Pu Liu, Jow Lay Huang

研究成果: Article同行評審

30 引文 斯高帕斯(Scopus)

摘要

We demonstrate the growth of high quality, single phase, wurtzite MgxZn1-xO thin films on p-type Si (111) substrate by magnetron sputtering using Mg0·3Zn0.7O as target and no buffer layer is used for the growth. The films are highly oriented along the c-axis and have nanorod-like morphology. The Mg content in MgxZn1-xO films varies in a large range (40.7–51 at. %) by changing the substrate temperature from room temperature to 250 °C. The MgxZn1-xO films maintain the hexagonal phase up to 150 °C substrate temperature and the Mg content at this temperature is 43.7 at.%. The heterostructures of MgxZn1-xO/Si are fabricated into metal-semiconductor-metal photodetectors. The signal to noise ratio (S/N) is as high as 4.3 × 104% at 2 V bias under 325 nm laser at relatively low laser illumination intensity (2.77 mW), and the output photocurrent increases with the increase in the UV illumination intensity at both − 10 V and + 10 V biased voltage. The photocurrents increase with the rise in the illumination intensity. The peak responsivity is 4.6 A/W at 292 nm with a cutoff wavelength of 305 nm and at 9 V bias voltage.

原文English
頁(從 - 到)170-174
頁數5
期刊Thin Solid Films
620
DOIs
出版狀態Published - 2016 十二月 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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