The phase composition, structure, morphology, and thermal conductivity of Bi₂Te_3−xSe_x-based semiconductor solid solution after photon treatment (PT) were studied by X-ray diffractometry, SEM, TEM, and the laser flash techniques. It was revealed that PT leads to recrystallization of the subsurface layers of the solid solution with the formation of a heterogeneous nanocrystalline structure. The thermoelectric figure of merit of the semiconductor Bi₂Te_3−xSe_x (n-type) solid solution increases after PT due to modification of the surface layers. This is due to the decrease of the thermal conductivity of the studied material after PT.

中文翻译：

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光子对热电材料Bi 2 Te 3−x Se x的表面和品质因数的影响

通过X射线衍射，SEM，TEM和激光闪光技术研究了Bi ₂ Te _{3− x} Se _x基半导体固溶体在光子处理（PT）后的相组成，结构，形貌和热导率。揭示了PT导致固溶体的亚表面层重结晶，并形成异质的纳米晶体结构。PT后，由于表面层的改性，半导体Bi ₂ Te _{3- x} Se _x（n型）固溶体的热电性能因数增加。这是由于PT后所研究材料的热导率降低。