Nano Express

Nanoscale Research Letters

, Volume 4, Issue 12, pp 1540-1546

Open Access This content is freely available online to anyone, anywhere at any time.

A Quaternary ZnCdSeTe Nanotip Photodetector

  • S. J. ChangAffiliated withInstitute of Microelectronics and Department of Electrical Engineering, Advanced Optoelectronic Technology Center, Center for Micro/Nano Science and Technology, National Cheng Kung University Email author 
  • , C. H. HsiaoAffiliated withInstitute of Microelectronics and Department of Electrical Engineering, Advanced Optoelectronic Technology Center, Center for Micro/Nano Science and Technology, National Cheng Kung University
  • , S. B. WangAffiliated withInstitute of Microelectronics and Department of Electrical Engineering, Advanced Optoelectronic Technology Center, Center for Micro/Nano Science and Technology, National Cheng Kung University
  • , Y. C. ChengAffiliated withMaterials and Electro-Optics Research Division, Chung Shan Institute of Science and Technology
  • , T. C. LiAffiliated withMaterials and Electro-Optics Research Division, Chung Shan Institute of Science and Technology
  • , S. P. ChangAffiliated withInstitute of Microelectronics and Department of Electrical Engineering, Advanced Optoelectronic Technology Center, Center for Micro/Nano Science and Technology, National Cheng Kung University
  • , B. R. HuangAffiliated withDepartment of Electronic Engineering, Graduate Institute of Electro-Optical Engineering, National Taiwan University of Science and Technology
  • , S. C. HungAffiliated withDepartment of Information Technology and Communication, Shih Chien University

Abstract

The authors report the growth of needle-like high density quaternary Zn0.87Cd0.13Se0.98Te0.02 nanotips on oxidized Si(100) substrate. It was found that average length and average diameter of the nanotips were 1.3 μm and 91 nm, respectively. It was also found that the as-grown ZnCdSeTe nanotips exhibit mixture of cubic zinc-blende and hexagonal wurtzite structures. Furthermore, it was found that the operation speeds of the fabricated ZnCdSeTe nanotip photodetector were fast with turn-on and turn-off time constants both less than 2 s.

Keywords

ZnCdSeTe Nanotips MBE Photodetector