Effect of temperature changes on thermoelectric properties of the two sided-closed single-walled Boron Nitride nanotubes (۶, ۳)
- سال انتشار: 1401
- محل انتشار: مجله ی اینترفیس ها، فیلم های نازک و سیستم های کم ابعاد، دوره: 5، شماره: 1
- کد COI اختصاصی: JR_JITF-5-1_001
- زبان مقاله: انگلیسی
- تعداد مشاهده: 178
نویسندگان
Department of Physics, Takestan Branch, Islamic Azad University, Takestan, Iran
Department of Physics, Takestan Branch, Islamic Azad University, Takestan, Iran
Department of Physics, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran
Department of Physics, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran
چکیده
In this study, thermoelectric properties of the two sided-closed single-walled boron nitride nanotubes (TSC-SWBNNTs) are investigated. For this purpose, a nanotube with the chirality of (۶, ۳) is selected with no impurities. The energy is considered in the range of -۵.۵ to ۵.۵ electron volts and the investigations are performed at the temperatures ۳۰۰, ۵۰۰, ۷۰۰ and ۹۰۰K. The results show that increasing temperature results in significant reduction in the length of the bandgap. Besides, the peaks of the conduction diagram become smaller and their number decreases, indicating the return of more electrons and holes around the LUMO and HOMO bands, respectively, which leads to reduction of the bandgap and increase in the conduction. Moreover, the seebeck coefficient (thermal power) has increased to about ۳۷۰ μV/K by increasing temperature to ۹۰۰K. As the temperature increases, the coefficient of merit (ZT) increases to about ۰.۹۵, and it is expected to experience more increase with further increase in temperature. Thermal conductivity has also increased slightly with increasing temperature. However, the values of thermal conductivity are at the nanoscale. Therefore, in general, it can be concluded that the (TSC-SWBNNT) (۶, ۳) can be selected as a suitable thermoelectric material.کلیدواژه ها
nanotube, seebeck coefficient (thermal power), coefficient of merit, Thermal conductivity, Electrical conductivityاطلاعات بیشتر در مورد COI
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