Empirical Modeling of Dopability in Diamond-Like Semiconductors: Article No. 71

Eric Toberer, Samuel Miller, Maxwell Dylla, Shashwat Anand, Kiarash Gordiz, G. Snyder

Research output: Contribution to journalArticlepeer-review

23 Scopus Citations

Abstract

Carrier concentration optimization has been an enduring challenge when developing newly discovered semiconductors for applications (e.g., thermoelectrics, transparent conductors, photovoltaics). This barrier has been particularly pernicious in the realm of high-throughput property prediction, where the carrier concentration is often assumed to be a free parameter and the limits are not predicted due to the high computational cost. In this work, we explore the application of machine learning for high-throughput carrier concentration range prediction. Bounding the model within diamond-like semiconductors, the learning set was developed from experimental carrier concentration data on 127 compounds ranging from unary to quaternary. The data were analyzed using various statistical and machine learning methods. Accurate predictions of carrier concentration ranges in diamond-like semiconductors are made within approximately one order of magnitude on average across both p- and n-type dopability. The model fit to empirical data is analyzed to understand what drives trends in carrier concentration and compared with previous computational efforts. Finally, dopability predictions from this model are combined with high-throughput quality factor predictions to identify promising thermoelectric materials.
Original languageAmerican English
Number of pages8
Journal n p j Computational Materials
Volume4
DOIs
StatePublished - 2018

NREL Publication Number

  • NREL/JA-5K00-73016

Keywords

  • computational methods
  • thermoelectrics

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