Open Access Nano Express

A Quaternary ZnCdSeTe Nanotip Photodetector

SJ Chang1*, CH Hsiao1, SB Wang1, YC Cheng2, TC Li2, SP Chang1, BR Huang3 and SC Hung4

Author Affiliations

1 Institute of Microelectronics and Department of Electrical Engineering, Advanced Optoelectronic Technology Center, Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan, 701, Taiwan, ROC

2 Materials and Electro-Optics Research Division, Chung Shan Institute of Science and Technology, Taoyuan, 325, Taiwan, ROC

3 Department of Electronic Engineering, Graduate Institute of Electro-Optical Engineering, National Taiwan University of Science and Technology, Taipei, 106, Taiwan, ROC

4 Department of Information Technology and Communication, Shih Chien University, Neimen, Kaohsiung, 845, Taiwan, ROC

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Nanoscale Research Letters 2009, 4:1540-1546  doi:10.1007/s11671-009-9432-5

Published: 16 September 2009

Abstract

The authors report the growth of needle-like high density quaternary Zn0.87Cd0.13Se0.98Te0.02nanotips 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