High quality AlGaAs layers grown by molecular beam epitaxy at low temperatures

K. H. Chang, Jenq-Shinn Wu, D. G. Liu, D. C. Liou, C. P. Lee

研究成果: Article

1 引文 斯高帕斯(Scopus)

摘要

Low-temperature (∼600 °C) molecular beam epitaxy (MBE) growth of AlGaAs has been studied. It was found that the quality of AlGaAs grown at low temperatures can be as good as that grown at high temperatures (>700 °C) if the source materials and the growth chamber are very clean. The threshold currents of Al0.6Ga0.4As/Al0.15Ga0.85As/Al0.6Ga0.4As double heterostructure (DH) lasers grown at low temperatures and high temperatures are almost the same. The material quality can be further improved with a proper amount of indium doping. Photoluminescence (PL) linewidths of 3.1 meV and 1.7 meV have been measured for Indoped Al0.42Ga0.58As and Al0.18Ga0.82As at 4 K, respectively. They are the narrowest linewidths for the MBE-grown AlGaAs with comparable Al contents at any growth temperature. With a proper amount of In doping, double-barrier resonant tunnelling diodes have also shown improved peak-to-valley current ratios.

原文English
頁(從 - 到)11-15
頁數5
期刊Journal of Materials Science: Materials in Electronics
3
發行號1
DOIs
出版狀態Published - 1992 三月 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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