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Constructing van der Waals gaps in cubic-structured SnTe-based thermoelectric materials
Energy & Environmental Science ( IF 32.5 ) Pub Date : 2020-11-03 , DOI: 10.1039/d0ee02638g Xiao Xu 1, 2, 3, 4 , Juan Cui 1, 2, 3, 4 , Yong Yu 1, 2, 3, 4 , Bin Zhu 1, 2, 3, 4 , Yi Huang 1, 2, 3, 4 , Lin Xie 1, 2, 3, 4 , Di Wu 4, 5, 6, 7 , Jiaqing He 1, 2, 3, 4
Energy & Environmental Science ( IF 32.5 ) Pub Date : 2020-11-03 , DOI: 10.1039/d0ee02638g Xiao Xu 1, 2, 3, 4 , Juan Cui 1, 2, 3, 4 , Yong Yu 1, 2, 3, 4 , Bin Zhu 1, 2, 3, 4 , Yi Huang 1, 2, 3, 4 , Lin Xie 1, 2, 3, 4 , Di Wu 4, 5, 6, 7 , Jiaqing He 1, 2, 3, 4
Affiliation
The practical application of eco-friendly tin telluride (SnTe) at intermediate temperatures has been long restricted by its lower average ZT than that of state-of-art PbTe. Here, a maximal figure of merit ZTmax ∼ 1.4 at 773 K and an ultrahigh ZTave ∼ 0.83 (between 323 and 773 K) are realized in SnTe by alloying with Sb2Te3 and follow-up rhenium doping. Microstructural characterizations reveal that Sb2Te3 alloying produces van der Waals gap-like structure throughout the SnTe matrix, leading to a significant reduction of lattice thermal conductivity; rhenium doping can tune the carrier concentration precisely at high temperatures, thus further improving the power factor. The construction of gap-like structure in our Sb2Te3(SnTe)n samples and its remarkable effect on thermoelectric transports can shed light for future studies of SnTe and analogous thermoelectric systems.
中文翻译:
在立方结构的SnTe基热电材料中构建范德华间隙
长期以来,由于其平均ZT值低于最新的PbTe值,因此长期限制了其在中等温度下对环境友好的碲化锡(SnTe)的实际应用。在此,优点的最大数字ZT最大值在773 K〜1.4和超高ZT AVE〜0.83(323和773之间K)在的SnTe通过与锑合金实现2碲3和后续铼掺杂。显微组织表征表明Sb 2 Te 3合金化会在整个SnTe基体中产生范德华间隙状结构,从而显着降低晶格热导率;掺杂可以在高温下精确地调整载流子浓度,从而进一步提高功率因数。我们的Sb 2 Te 3(SnTe)n样品中类似缝隙结构的构造及其对热电传输的显着影响可以为SnTe和类似热电系统的未来研究提供启示。
更新日期:2020-11-18
中文翻译:
在立方结构的SnTe基热电材料中构建范德华间隙
长期以来,由于其平均ZT值低于最新的PbTe值,因此长期限制了其在中等温度下对环境友好的碲化锡(SnTe)的实际应用。在此,优点的最大数字ZT最大值在773 K〜1.4和超高ZT AVE〜0.83(323和773之间K)在的SnTe通过与锑合金实现2碲3和后续铼掺杂。显微组织表征表明Sb 2 Te 3合金化会在整个SnTe基体中产生范德华间隙状结构,从而显着降低晶格热导率;掺杂可以在高温下精确地调整载流子浓度,从而进一步提高功率因数。我们的Sb 2 Te 3(SnTe)n样品中类似缝隙结构的构造及其对热电传输的显着影响可以为SnTe和类似热电系统的未来研究提供启示。