Study of ‘Germanium and Nanoparticles' Optical Absorption Properties

  • Dr. Pawan Kumar Associate Professor, Department of Physics, Meerut College, Meerut, Uttar Pradesh, INDIA
Keywords: Germanium, Nanoparticles, Absorption

Abstract

The optical absorption characteristics of non-crystalline and crystalline Ge nanoparticles with diameters ranging from ∼ 2.5 to 15 Å have been investigated using time-dependent density functional theory at the B3LYP/6-31G level. On certain chosen Ge nanoparticles, hydrogen passivation and phosphorus doping were also computed. The optical absorption spectra of non-crystalline Ge nanoparticles evolve from numerous peaks to a continuous wide band as cluster size increases, while also exhibiting a consistent red-shift. For both non-crystalline and crystalline Ge nanoparticles, doping phosphorus causes the absorption spectra to move toward the lower energy region. In contrast to crystalline Ge nanoparticles, non-crystalline Ge nanoparticles exhibit higher absorption in the visible range, independent of phosphorus doping.

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Published
2020-02-28
How to Cite
Dr. Pawan Kumar. (2020). Study of ‘Germanium and Nanoparticles’ Optical Absorption Properties. International Journal of Engineering and Management Research, 10(1), 143-151. https://doi.org/10.31033/ijemr.10.1.23