Fig. 6: Exemplified application of FAST-synthesized high-quality perovskites in ultralow thermal conductivity of intrinsic n-type FAST-Cs2SnI6. | Nature Communications

Fig. 6: Exemplified application of FAST-synthesized high-quality perovskites in ultralow thermal conductivity of intrinsic n-type FAST-Cs2SnI6.

From: A universal all-solid synthesis for high throughput production of halide perovskite

Fig. 6: Exemplified application of FAST-synthesized high-quality perovskites in ultralow thermal conductivity of intrinsic n-type FAST-Cs2SnI6.The alt text for this image may have been generated using AI.

a Lattice diagram of the vacancy-ordered feature. b The calculated Brillouin zone of the fcc lattice shows the symmetry points. c Total density of state (DOS). d Total density of phonon state (DOPS) of Cs2SnI6. e Photo of a FAST-Cs2SnI6 disk. f Corresponding cross-sectional SEM image. g XRD spectra of the FAST-synthesized Cs2.1Sn0.975I6, Cs2SnI6, and Cs1.9Sn1.025I6. The black asterisk represents the peak from CsI. h Temperature-dependent lattice thermal conductivity of the FAST-Cs1.9Sn1.025I6 in comparison with other types of state-of-the-art thermoelectric materials.

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