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Class Outline: Semiconductor Crystal Lattices. Semiconductor Crystal Growth. Things you should know when you leave... Key Questions. Why is crystal order important? How is a crystal defined? What are the most common types of crystal lattices used in semiconductor devices? What is the crystal structure? Crystalline. Polycrystalline. Amorphous.
Aug 28, 2022 · A single crystal of either an elemental (e.g., silicon) or compound (e.g., gallium arsenide) semiconductor forms the basis of almost all semiconductor devices. The ability to control the electronic and opto-electronic properties of these materials is based on an understanding of their structure.
Semiconductor Crystal Lattices • To discuss the crystal structure of different semiconductors we will need to account for the basis unit that is added to each lattice point. – Elemental semiconductors such as silicon and germanium both exhibit the diamond structure. – Named after one of the two crystalline forms of carbon.!!
The elastic strain field and tilt analysis of the crystal lattice, detectable by the variation in position and shape of the diffraction peaks, is used to quantify defects and investigate their mobility.
With the resulting crystal lattice structures, we review the basic physical properties of electrons in condensed crystalline materials with particular attention to the translational symmetry, the Bloch theorem, and the band theory.
Feb 25, 2018 · To define a unit cell, one introduces a three-dimensional point lattice and adds to this imaginary lattice an atomic basis, i.e., one, two, or more atoms in a specific arrangement for each point, in order to arrive at the crystal lattice (Klug and Alexander 1974; Buerger 1956).
Sep 21, 2019 · The most important point groups for semiconductors are O \(_{{\text {h}}}\) (realized e.g., in the crystal structures of diamond, Si, Ge, Cu \(_{2}\) O or NaCl), \(T_{{\text {d}}}\) (realized e.g., in the zincblende type crystal structure of ZnS, ZnSe, GaAs, InP, CuCl or AgBr) and C \(_{6{\text {v}}}\) (realized e.g., in the wurtzite type ...
