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Title: Correlation between the electronic structures and diffusion paths of interstitial defects in semiconductors: The case in CdTe

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [1];  [2];  [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  2. Univ. of Sao Paulo, Sao Carlos (Brazil). Sao Carlos Institute of Chemistry

Using first-principles calculations, we study the diffusions of interstitial defects Cd, Cu, Te, and Cl in CdTe. We find that the diffusion behavior is strongly correlated with the electronic structure of the interstitial diffuser. For Cd and Cu, because the defect state is the non-degenerated slike state under Td symmetry, the diffusions are almost along the [111] directions between the tetrahedral sites, although the diffusion of Cu shows some deviation due to the s - d coupling. The diffusions of the neutral and charged Cd and Cu follow similar paths. However, for Te and Cl atoms, because the defect state is the degenerated p-like state under Td symmetry, large distortions occur. Therefore, the diffusion paths are very different from those of Cd and Cu interstitials, and depend strongly on the charge states of the interstitial atoms. For Te, we find that the distortion is mostly stabilized by the crystal-field splitting, but for Cl, the exchange splitting plays a more important role.

Research Organization:
Arizona State Univ., Tempe, AZ (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0006344; AC36-08GO28308; AC02-05CH11231
OSTI ID:
1169659
Alternate ID(s):
OSTI ID: 1181506
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 90, Issue 15; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

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Cited By (6)

Energetics and Electronic Properties of Interstitial Chlorine in CdTe journal October 2018
Abnormal diffusion behaviors of Cu atoms in van der Waals layered material MoS 2 journal January 2019
Enhanced p-type dopability of P and As in CdTe using non-equilibrium thermal processing journal July 2015
First-principles study of roles of Cu and Cl in polycrystalline CdTe journal January 2016
Review on first-principles study of defect properties of CdTe as a solar cell absorber journal July 2016
Assessing the Role of Fluorine in the Performance of Al x Ga 1 x N / Ga N High-Electron-Mobility Transistors from First-Principles Calculations journal May 2019

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