The ultralow thermal conductivity of Cs2SnI6 by filling interstitial voids with Mg2+ ions DOI Creative Commons

Xiane Xiao,

Ziqi Liang, Qin Yao

и другие.

Journal of Applied Physics, Год журнала: 2024, Номер 136(22)

Опубликована: Дек. 12, 2024

Metal halide perovskites (MHPs) have received considerable attention due to their intrinsically disordered structures, leading abnormally low thermal conductivity, which is beneficial for energy harvesting applications. Compared with organic–inorganic hybrid MHPs, all inorganic MHPs exhibit better stability, but conductivity relatively high, about twice that of MHPs. In this study, we investigate an all-inorganic vacancy-ordered double perovskite, Cs2SnI6, characterized by a cage-like structure octahedral interstitial radius approximately 1.638 Å, allowing the accommodation various metal ions. We successfully introduced Mg2+ ions as guest fillers into interstices Cs2SnI6. The weak ionic bonds formed in these oversized induce vibrations enhance atomic disorder and anharmonicity within structure. As result, achieved exceptionally κ = 0.11 W m−1 K−1 at room temperature Mg0.102Cs2SnI6, representing 21% reduction compared undoped sample marking one lowest values reported This research offers novel approach effectively regulate significantly reduce

Язык: Английский

The ultralow thermal conductivity of Cs2SnI6 by filling interstitial voids with Mg2+ ions DOI Creative Commons

Xiane Xiao,

Ziqi Liang, Qin Yao

и другие.

Journal of Applied Physics, Год журнала: 2024, Номер 136(22)

Опубликована: Дек. 12, 2024

Metal halide perovskites (MHPs) have received considerable attention due to their intrinsically disordered structures, leading abnormally low thermal conductivity, which is beneficial for energy harvesting applications. Compared with organic–inorganic hybrid MHPs, all inorganic MHPs exhibit better stability, but conductivity relatively high, about twice that of MHPs. In this study, we investigate an all-inorganic vacancy-ordered double perovskite, Cs2SnI6, characterized by a cage-like structure octahedral interstitial radius approximately 1.638 Å, allowing the accommodation various metal ions. We successfully introduced Mg2+ ions as guest fillers into interstices Cs2SnI6. The weak ionic bonds formed in these oversized induce vibrations enhance atomic disorder and anharmonicity within structure. As result, achieved exceptionally κ = 0.11 W m−1 K−1 at room temperature Mg0.102Cs2SnI6, representing 21% reduction compared undoped sample marking one lowest values reported This research offers novel approach effectively regulate significantly reduce

Язык: Английский

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