Thermoelectric properties of layered oxyselenides with 3d transition metal ions
Thermoelectric properties of layered oxyselenides with 3d transition metal ions
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DOI：
10.1111/jace.18955
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发表时间：
2023-01-02
影响因子：
3.9
通讯作者：
Lin，Yuan-Hua
中科院分区：
文献类型：
--
作者：
Yang，Yueyang;Zhou，Zhifang;Lin，Yuan-Hua
层状氧硫属化合物由于其独特的电学、磁学性质和层状结构，在磁学、超导、锂电池、发光等领域受到了广泛的关注，其中层状氧硒化合物具有优异的热电性能，如BiCuSeO和Bi 2LnO 4Cu 2Se 2。在这里，我们成功地合成了Sr_2MO_2Cu_2Se_2（M = Co，Ni，Zn）和Sr_2FeO_3CuSe，并研究了其在宽温度范围（298-923 K）的热电性能。它们在中高温范围内具有相对较高的塞贝克系数（>300 μV K−1），并具有较低的热导率。本征Sr 2NiO 2Cu 2Se 2在923 K时的功率因数和ZT分别达到65 μW m− 1 K − 1和0.07，通过载流子浓度优化和能带结构工程等策略有望获得更高的性能。
Layered oxychalcogenides have received extensive attention in the fields of magnetism, superconductivity, lithium battery, and luminescence due to their unique electronic, magnetic properties, and layered structure, among which layered oxyselenides have excellent and promising thermoelectric performance, such as BiCuSeO and Bi2LnO4Cu2Se2. Here, we successfully synthesized Sr2MO2Cu2Se2(M = Co, Ni, Zn) and Sr2FeO3CuSe and investigated the thermoelectric properties at a wide temperature range (298–923 K). They have a relatively high Seebeck coefficient (>300 μV K−1) in medium to high temperature range and possess a low thermal conductivity. The power factor and ZT reach 65 μW m−1K−1and 0.07 at 923 K for intrinsic Sr2NiO2Cu2Se2, and a higher performance is expected to be achieved by strategies like carrier concentration optimization and band structure engineering.