Low-temperature and low-pressure growth and Raman spectroscopy characterization of phosphorous-doped n-type germanium nanowires

Abstract

The invention provides a low-temperature low-pressure growth method and Raman spectrum characterization method of a posphorus-doped N type germanium nano wire. With GeH4 / H2 as the precursor of germanium nano wire growth, with PH3 / Ar as a doping source gas, under the catalysis of gold nanoparticles, by using low pressure chemical vapor deposition (LPCVD), a large-area ordered high-density posphorus-doped N type germanium nano wire is prepared on the silicon substrate under low temperature, and the gold nanoparticles are obtained through electron beam evaporation. The posphorus-doped N type germanium nano wire is characterized through a Raman spectrum. According to the invention, the related technology of the semiconductor field and the synthesis method of micro nano structures, a large-density large-area germanium nano wire array can be obtained in a low-temperature low-pressure condition, the process is simple, and the posphorus-doped germanium nano wire is effectively characterized by using the Raman spectrum.

Description

technical field [0001] The invention relates to the intersecting fields of nanometer materials, microprocessing technology and micronano devices, in particular to a low-temperature and low-pressure growth and Raman spectrum characterization method of phosphorus-doped N-type germanium nanowires. Background technique [0002] Compared with traditional materials, one-dimensional semiconductor nanowires have many unique properties, such as low-dimensional scale, quantum confinement effect, surface activity and energy band separation, etc., making them useful as functional micro-nano systems in the fields of electricity and optoelectronics. very attractive structural unit. Germanium nanowires, due to their small effective mass of electrons and holes, have high carrier mobility, and thus become ideal channel materials in semiconductor devices. In addition, as the fourth main group element, germanium (Ge) has many properties similar to silicon (Si), which makes germanium, like sil...

AI Technical Summary

Problems solved by technology

However, there is no simple and effective synthesis method that can obtain high-density and large-area doped germanium nanowire arrays at low temperature and low pressure.

[0003] Doping can change the Fermi level of the material and provide additional atoms, so that the electrical properties of the material after doping can be improved. However, how to characterize the doped nanowires simply and effectively remains to be further explored

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