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A data fusion approach to optimize compositional stability of halide perovskites

Journal Article · · Matter (Online)
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  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Helmholz Institute Erlangen-Nürnberg (HI-ERN), Erlangen (Germany); Freidrich Alexander Univ. Erlangen-Nürnberg (FAU), Erlangen (Germany). Institute of Materials for Electronics and Energy Technology (i-MEET)
  3. Colorado School of Mines, Golden, CO (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Singapore-MIT Alliance for Research and Technology (Singapore)
  6. Helmholz Institute Erlangen-Nürnberg (HI-ERN), Erlangen (Germany)
  7. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Singapore-MIT Alliance for Research and Technology (Singapore)
Search for resource-efficient materials in vast compositional spaces is an outstanding challenge in creating environmentally stable perovskite semiconductors. We demonstrate a physics-constrained sequential learning framework to subsequently identify the most stable alloyed organic-inorganic perovskites. We fuse data from high-throughput degradation tests and first-principle calculations of phase thermodynamics into an end-to-end Bayesian optimization algorithm using probabilistic constraints. By sampling just 1.8% of the discretized CsxMAyFA1-x-yPbI3 (MA, methylammonium; FA, formamidinium) compositional space, perovskites centered at Cs0.17MA0.03FA0.80PbI3 show minimal optical change under increased temperature, moisture, and illumination with >17-fold stability improvement over MAPbI3. The thin films have 3-fold improved stability compared with state-of-the-art multi-halide Cs0.05(MA0.17FA0.83)0.95Pb(I0.83Br0.17)3, translating into enhanced solar cell stability without compromising conversion efficiency. Synchrotron-based X-ray scattering validates the suppression of chemical decomposition and minority phase formation achieved using fewer elements and a maximum of 8% MA. We anticipate that this data fusion approach can be extended to guide materials discovery for a wide range of multinary systems.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); National Science Foundation (NSF); Singapore-MIT Alliance for Research and Technology Low Energy Electronic Systems Program; Skotech NGP Program
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0012704
OSTI ID:
1778797
Alternate ID(s):
OSTI ID: 1824693
Report Number(s):
BNL--221308-2021-JAAM
Journal Information:
Matter (Online), Journal Name: Matter (Online) Journal Issue: 4 Vol. 4; ISSN 2590-2385
Publisher:
Cell Press/ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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