Physical mechanisms providing formation of ohmic contacts metal-semiconductor. Review
Journal Title: Semiconductor Physics, Quantum Electronics and Optoelectronics - Year 2018, Vol 21, Issue 1
Abstract
This review is devoted to presentation and analysis of physical mechanisms of ohmic contacts formation in semiconductors. In addition to the classical mechanisms known for decades, new mechanisms for current flow in ohmic contacts researched for the recent decade are described. Used in this review were the original results of the authors, which they described earlier in various papers of recent years. Current flow through dislocations combined with metal shunts, realized, in particular, on the lapped semiconductor surface; detailed current flow mechanism in the presence of doping step and current flow through the heavily doped semiconductor surface charge states reduction should be noted among the new mechanisms of current flow. These current flow mechanisms are characterized by the presence of specific contact resistance growth with temperature increase in some temperature intervals and contacts ohmicity up to helium temperatures.
Authors and Affiliations
A. V. Sachenko
Keywords
Related Articles
- EP ID EP415952
- DOI 10.15407/spqeo21.01.005
- Views 79
- Downloads 0
Luminescence of crystals ZnSe <Al>:Gd
It has been experimentally shown that the luminescence spectra of ZnSe <Al> crystals doped with Gd from the vapor phase contain two mutually compatible luminescence bands. It is established that the low-energy G-band is...
Analysis of the silicon solar cells efficiency. Type of doping and level optimization
The theoretical analysis of photovoltaic conversion efficiency of highly effective silicon solar cells (SC) has been performed for n-type and p-type bases. Considered here is the case when the Shockley–Read–Hall recombin...
Metallic nanoparticles (Cu, Ag, Au) in chalcogenide and oxide glassy matrices: comparative assessment in terms of chemical bonding
Principal difference in origin of high-order optical non-linearities caused by metallic nanoparticles such as Cu, Ag and Au embedded destructively in oxide- and chalcogenide-type glassy matrices has been analyzed from th...
Temperature studies of optical absorption in the sandwich structure based on (Ag3AsS3)0.6(As2S3)0.4 thin film and gold nanoparticles
(Ag3AsS3)0.6(As2S3)0.4 thin films deposited using the thermal evaporation technique onto glass substrates previously covered with layers of gold nanoparticles were studied. Optical transmission spectra of the sandwich st...
Nanostructuring the SiOx layers by using laser-induced self-organization
The processes of laser-induced transformation of SiOx oxide layers into the nanocomposite ones were studied. The possibility of phase separation in the form of Si nanocrystals surrounded by corresponding SiO2 oxide matri...