Point defect engineering strategies to retard phosphorous diffusion in germanium

Tahini, H. A.; Chroneos, Alexander I.; Grimes, Robin W.; Schwingenschlögl, Udo; Bracht, Hartmut A.

Type

Article

Authors

Tahini, H. A.
Chroneos, Alexander I.
Grimes, Robin W.
Schwingenschlögl, Udo

Bracht, Hartmut A.

KAUST Department

Computational Physics and Materials Science (CPMS)
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division

Date

2013

Permanent link to this record

http://hdl.handle.net/10754/562474

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Abstract

The diffusion of phosphorous in germanium is very fast, requiring point defect engineering strategies to retard it in support of technological application. Density functional theory corroborated with hybrid density functional calculations are used to investigate the influence of the isovalent codopants tin and hafnium in the migration of phosphorous via the vacancy-mediated diffusion process. The migration energy barriers for phosphorous are increased significantly in the presence of oversized isovalent codopants. Therefore, it is proposed that tin and in particular hafnium codoping are efficient point defect engineering strategies to retard phosphorous migration. © the Owner Societies 2013.

Citation

Tahini, H. A., Chroneos, A., Grimes, R. W., Schwingenschlögl, U., & Bracht, H. (2013). Point defect engineering strategies to retard phosphorous diffusion in germanium. Phys. Chem. Chem. Phys., 15(1), 367–371. doi:10.1039/c2cp42973j

Sponsors

This publication was based on research supported by King Abdullah University for Science and Technology (KAUST). HT would like to acknowledge the useful discussions with Dr Samuel Murphy and his help in rendering some of the graphics in this publication. AC acknowledges financial support from the EU FP7-PEOPLE-2010-IEF project REACT-273631. Computing resources were provided by the Shaheen supercomputer at KAUST (http://www.hpc.kaust.edu.sa/) and the High Performance Computing (HPC) facility of Imperial College London (http://www3.imperial.ac.uk/ict/services/highperformancecomputing).