Defects in AlSb: a density functional study
Journal Article
·
· Physical Review B
- ORNL
We carry out density functional calculations to study both intrinsic and extrinsic defects in AlSb. We focus on the carrier compensation and trapping properties of these defects, which are important to the radiation detection applications. We show that the Sb antisite is a low-energy defect, baring much similarity to the As antisite in GaAs. The SbAl is effective in compensating holes induced by the residual carbon, but is also a deep electron trap that reduces the carrier drifting length. We discuss the possibility of using hydrogenated isovalent N impurity in AlSb and GaAs to pin the Fermi level without causing efficient carrier trapping.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- NNSA USDOE - National Nuclear Security Administration (NNSA)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 968272
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 4 Vol. 79; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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