The effect on the optical modes of quaternary chalcogenides upon metal and chalcogen substitution
The effect on the optical modes of quaternary chalcogenides upon metal and chalcogen substitution
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DOI：
10.1063/1.5143248
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发表时间：
2020-02
影响因子：
4
通讯作者：
Amanda J. Souna;Kaya Wei;G. Nolas
中科院分区：
文献类型：
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作者：
Amanda J. Souna;Kaya Wei;G. Nolas
研究了Cu2ZnSnSe_4、Ag2ZnSnSe_4和Cu2CdSnTe_4多晶的拉曼散射光谱，以研究金属和硫化物位置上取代后的振动模式。随着金属掺杂的增加，非对称模式发生显著的位移，其中Ag2ZnSnSe_4的非对称模式比Cu2ZnSnSe_4的位移50 cm−~(-1)。碲的取代导致对称模的频率较低。结构数据被用来解释我们的结果。这些结果旨在提供对这些材料的进一步洞察，因为它们继续对潜在的热电和光伏应用感兴趣。
Raman-scattering spectra of polycrystalline Cu2ZnSnSe4, Ag2ZnSnSe4, and Cu2CdSnTe4 were investigated in order to investigate the vibrational modes upon substitution on the metal and chalcogen sites. The non-symmetric modes shift dramatically with metal substitution in the kesterite materials, with Ag2ZnSnSe4 modes shifting by 50 cm−1 in comparison with that of Cu2ZnSnSe4. Tellurium substitution results in a lower frequency of the symmetric modes. Structural data are employed to elucidate our results. These results are intended to provide further insight into these materials as they continue to be of interest for potential thermoelectric and photovoltaic applications.