Topotactic anion-exchange in thermoelectric nanostructured layered tin chalcogenides with reduced selenium content.
Topotactic anion-exchange in thermoelectric nanostructured layered tin chalcogenides with reduced selenium content.
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DOI:
10.1039/c7sc05190e
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发表时间:
2018-04-21
期刊:
影响因子:
8.4
通讯作者:
Gregory DH
中科院分区:
文献类型:
--
作者:
Han G;Popuri SR;Greer HF;Zhang R;Ferre-Llin L;Bos JG;Zhou W;Reece MJ;Paul DJ;Knox AR;Gregory DH
Topotactic solution synthesis yields nanostructured tin chalcogenides, SnS1–xSex with controllable composition; spark plasma sintered SnS0.1Se0.9 achieves ZT ≈ 1.16 at 923 K via microstructural texture tuning. Anion exchange has been performed with nanoplates of tin sulfide (SnS) via “soft chemical” organic-free solution syntheses to yield layered pseudo-ternary tin chalcogenides on a 10 g-scale. SnS undergoes a topotactic transformation to form a series of S-substituted tin selenide (SnSe) nano/micro-plates with tuneable chalcogenide composition. SnS0.1Se0.9 nanoplates were spark plasma sintered into phase-pure, textured, dense pellets, the ZT of which has been significantly enhanced to ≈1.16 from ≈0.74 at 923 K via microstructure texturing control. These approaches provide versatile, scalable and low-cost routes to p-type layered tin chalcogenides with controllable composition and competitive thermoelectric performance.
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