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The Influence of Boron Dopant on the Structural and Mechanical Properties of Silicon: First Principles Study

  • Shadia IkhmayiesEmail author
  • Yasemin Ö. Çiftci
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Boron (B) is usually used to produce p-type silicon to form the base layer in wafer-based silicon solar cells. The main objective of this work is to investigate the influence of B doping on the structural and mechanical properties of silicon. Using CASTEP program, which uses the density functional theory (DFT), with a plane wave basis, the structural, electronic, and mechanical properties of pure Si and the solid solution Si1−xBx (0.0001 ≤ x ≤ 0.05) were studied. The structure, density of states, band structure, and elastic properties were computed. It is found that as B concentration increases, the lattice constant increases, Bulk modulus (B), Shear modulus (G), and Young modulus (E) decreases. The ratio G/B decreases and Poisson’s ratio (ν) increases. The decrease of G/B and increase of ν mean that brittleness of Si decreases by increasing B concentration.

Keywords

Silicon Doping Boron Solar cells CASTEP 

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Faculty of Science, Physics DepartmentAl Isra UniversityAmmanJordan
  2. 2.Department of PhysicsGazi UniversityTeknikokullar, AnkaraTurkey

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