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Zhang. Microstructures 2023;3:2023003 https://dx.doi.org/10.20517/microstructures.2022.38 Page 3 of 4

Figure 1. (A) Contour map of the distribution of polarization angles (θ). (B) Statistics of the distribution of θ in the range of 0°-45°,
extracted from over 30, 000 polarization vectors. (C) Strong correlation between d and the number of B-site element types (n ) for a
33 B
[17]
series of PbBO -based solid solutions. Reproduced with permission from , Copyright 2022, Elsevier. (D) Atomic-resolution high-angle
3
annular dark field - scanning transmission electron microscopy (HAADF STEM) polarization vector image along [110] . (E) Comparison
c
of the recoverable energy storage density, W (efficiency, η ≥ 90%), of (K,Na)NbO (KNN)-based high-entropy ceramic with other
rec
3
-3
representative lead-free bulk ceramics with W ≥ 1 J cm . Reproduced with permission from [18] , Copyright 2022, Nature Publishing
rec
Group.
control methods, rather than a single ferroelectric/piezoelectric performance improvement. We believe that
high-entropy design will become an important way to enhance the electrical properties of perovskite
materials, enriching the design of material components thanks to the rapid development of machine
learning and materials genome engineering.
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