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Title: Finding new perovskite halides via machine learning

Journal Article · · Frontiers in Materials
 [1];  [1];  [2];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Connecticut, Storrs, CT (United States)

Advanced materials with improved properties have the potential to fuel future technological advancements. However, identification and discovery of these optimal materials for a specific application is a non-trivial task, because of the vastness of the chemical search space with enormous compositional and configurational degrees of freedom. Materials informatics provides an efficient approach toward rational design of new materials, via learning from known data to make decisions on new and previously unexplored compounds in an accelerated manner. Here, we demonstrate the power and utility of such statistical learning (or machine learning, henceforth referred to as ML) via building a support vector machine (SVM) based classifier that uses elemental features (or descriptors) to predict the formability of a given ABX3 halide composition (where A and B represent monovalent and divalent cations, respectively, and X is F, Cl, Br, or I anion) in the perovskite crystal structure. The classification model is built by learning from a dataset of 185 experimentally known ABX3 compounds. After exploring a wide range of features, we identify ionic radii, tolerance factor, and octahedral factor to be the most important factors for the classification, suggesting that steric and geometric packing effects govern the stability of these halides. As a result, the trained and validated models then predict, with a high degree of confidence, several novel ABX3 compositions with perovskite crystal structure.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1258584
Report Number(s):
LA-UR-16-21643
Journal Information:
Frontiers in Materials, Vol. 3; ISSN 2296-8016
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 118 works
Citation information provided by
Web of Science

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Predicting the electronic structure, magnetism, and transport properties of new Co-based Heusler alloys journal August 2018
Halogen in materials design: Chloroammonium lead triiodide perovskite (ClNH 3 PbI 3 ) a dynamical bandgap semiconductor in 3D for photovoltaics journal June 2018
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A Statistical Learning Framework for Accelerated Bandgap Prediction of Inorganic Compounds journal November 2019
Materials Design in Digital Era: Challenges and Opportunities journal June 2019
Machine learning in materials informatics: recent applications and prospects journal December 2017
Rationalizing the interphase stability of Li|doped-Li 7 La 3 Zr 2 O 12 via automated reaction screening and machine learning journal January 2019
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From DFT to machine learning: recent approaches to materials science–a review journal May 2019
New tolerance factor to predict the stability of perovskite oxides and halides journal February 2019
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Materials science in the artificial intelligence age: high-throughput library generation, machine learning, and a pathway from correlations to the underpinning physics journal July 2019
New Tolerance Factor to Predict the Stability of Perovskite Oxides and Halides text January 2018
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