Synthesis, structure, electronic and thermal properties of sphalerite CuZn 2 InS 4
Synthesis, structure, electronic and thermal properties of sphalerite CuZn 2 InS 4
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闪锌矿CuZn 2 InS 4 的合成、结构、电子和热性质
DOI：
10.1039/d1dt03218f
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发表时间：
2021
影响因子：
4
通讯作者：
Nolas, George S.
中科院分区：
文献类型：
--
作者：
Ojo, Oluwagbemiga P.;Gunatilleke, Wilarachchige D.;Poddig, Hagen;Wang, Hsin;Martin, Joshua;Kirsch, Dylan J.;Nolas, George S.
四元硫属化合物由于其具有的各种物理性质以及它们在不同应用中的潜力而继续受到关注。对具有闪锌矿晶体结构的材料的研究只是最近才开始的。在这项研究中，我们合成了硫基闪锌矿四元硫属化合物，包括非化学计量组成，并研究了这些材料的温度依赖性的电子，热和结构性能。绝缘半导体运输与化学计量的变化，观察和热容量和热膨胀分析显示晶格非谐性，有助于这些材料具有低的热导率。我们包括类似的分析CuZn2InSe4和比较这些闪锌矿四元硫族化合物的锌bridbinaries，以充分了解这些四元硫族化合物具有的低热导率的起源。
Quaternary chalcogenides continue to be of interest due to the variety of physical properties they possess, as well as their potential for different applications of interest. Investigations on materials with the sphalerite crystal structure have only recently begun. In this study we have synthesized sulfur-based sphalerite quaternary chalcogenides, including off-stoichiometric compositions, and investigated the temperature-dependent electronic, thermal and structural properties of these materials. Insulating to semiconducting transport is observed with stoichiometric variation, and analyses of heat capacity and thermal expansion revealed lattice anharmonicity that contributes to the low thermal conductivity these materials possess. We include similar analyses for CuZn2InSe4 and compare these sphalerite quaternary chalcogenides to that of zinc blende binaries in order to fully understand the origin of the low thermal conductivity these quaternary chalcogenides possess.