Silicon (Si) is the dominant substrate used in the manufacture of electronic devices, owing to its excellent electrical and electronic properties. However, the shortcomings of Si, especially its poor mechanical properties such as brittleness of its wafers as they are made thinner (less than 40 mm), limit its applications in the manufacture of minute electronic devices such as...
There has been a drastic growth microelectronics industry in the recent past. These industries utilize different materials, the main being semiconductors. The performance of these materials relies on its structural, electrical and optical properties depending on the application. Therefore, there is always a need to undertake measurements of the semiconductor characteristics in a manner that is...
Computation of Electronic and Structural Properties of Tin halide Perovskites for Photovoltaic Application by first principles
Perpetua Jelimo Chemaoi, P.W.O. Nyawere and C.M. Maghanga
Department of Physical and Biological Sciences,
School of Engineering and Technology,
Kabarak University
P.O. Box Private Bag - 20157 Kabarak
perpetuajelimo@gmail.com
Abstract
Lead free...
The vagaries of climate change have resulted in decline of the yield and production of major staple crops in Kenya, resulting in food insecurity. The variability of climate has affected production of these crops hence exposing most farm households to food insecurity. To overcome these trends, the Kenyan government in partnership with other development organizations have promoted production of...
Let H be an infinite dimensional complex Hilbert space and F_OI (H) the set of all Fredholm operators perturbed by orthogonal idempotents in Banach space. The objective of the study is determine the conditions under which Fredholm operators retain Fredholmness when perturbed by orthogonal idempotents in Banach spaces. The methodology involved tensor products, direct sum decomposition, spectral...
Abstract
Cooper pairs are bound entities with attractive interaction provided by the virtual exchange of a phonon between two electrons. Phonon energy is ℏω_D where ω_D is the Debye frequency of a given super-conductor. The corresponding Debye temperature θ_D is related to ℏω_D via the relation kθ_D=ℏω_D. Since the electrons in a Cooper pair are separated by a finite distance (r) called...
Superconductivity at high temperature has been discovered in iron-pnictide compounds and this has ignited numerous interest and research on the properties of these compounds. Iron Pnictides in past studies have exhibited superconductivity up to high temperatures of 26K. Eu〖Fe〗_2 〖As〗_2 is one of the 122 iron pnictide compounds with a body centered tetragonal crystal structure and has also...