Universal machine learning framework for defect predictions in zinc blende semiconductors

Arun Mannodi-Kanakkithodi*, Xiaofeng Xiang, Laura Jacoby, Robert Biegaj, Scott T. Dunham, Daniel R. Gamelin, Maria K.Y. Chan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We develop a framework powered by machine learning (ML) and high-throughput density functional theory (DFT) computations for the prediction and screening of functional impurities in groups IV, III–V, and II–VI zinc blende semiconductors. Elements spanning the length and breadth of the periodic table are considered as impurity atoms at the cation, anion, or interstitial sites in supercells of 34 candidate semiconductors, leading to a chemical space of approximately 12,000 points, 10% of which are used to generate a DFT dataset of charge dependent defect formation energies. Descriptors based on tabulated elemental properties, defect coordination environment, and relevant semiconductor properties are used to train ML regression models for the DFT computed neutral state formation energies and charge transition levels of impurities. Optimized kernel ridge, Gaussian process, random forest, and neural network regression models are applied to screen impurities with lower formation energy than dominant native defects in all compounds.

Original languageEnglish (US)
Article number100450
JournalPatterns
Volume3
Issue number3
DOIs
StatePublished - Mar 11 2022

Keywords

  • DSML 3: Development/Pre-production: Data science output has been rolled out/validated across multiple domains/problems
  • combinatorial screening
  • computational materials science
  • density functional theory
  • high-throughput data
  • machine learning
  • materials informatics
  • mid-gap states
  • point defects
  • semiconductors

ASJC Scopus subject areas

  • General Decision Sciences

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