Range Determination of the Influence of Carrier Concentration on Lattice Thermal Conductivity for Bulk Si and Nanowires

Ibrahim Nazem Qader; Botan Abdullah; Mustafa Omar

doi:10.29002/asujse.657837

Research Article

Range Determination of the Influence of Carrier Concentration on Lattice Thermal Conductivity for Bulk Si and Nanowires

Year 2020, Volume: 4 Issue: 1, 30 - 42, 30.06.2020

Ibrahim Nazem Qader , Botan Abdullah , Mustafa Omar

https://doi.org/10.29002/asujse.657837

Cited By: 8

Abstract

Mathematical modeling has been extended to simulate some physical systems to calculate some parameters that may need a sophisticated cost or may have some obstacles to be measured directly with an experimental method. In this study, the Modified Callaway Model has been used to calculate size dependence lattice thermal conductivity (LTC), and the influence of carrier concentration for bulk Si and its nanowires (NWs) with diameters of 22, 37, 56, and 115 nm has been investigated. Calculations were performed from 3K to 1600K for all cases. The effects of carrier concentration on LTC has found to begin from (10¹⁶ cm^-1) for the bulk state and that increased to (10²⁴ cm^-1) for the NW with a diameter of 22 nm. The temperature that the maximum effect of carrier concentration can occur, has found to be at (10 K) for the bulk, and that increased to (340 K) for the (22 nm) Si NW.

Keywords

Lattice Thermal Conductivity, Si, Nanowires, Carrier Concentration, Mass Density

Supporting Institution

Salahaddin-Erbil University

Project Number

7/29/2359-2472017

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