Thermal Conductivity of Few-Layer PtS2 and PtSe2 Obtained from Optothermal Raman Spectroscopy,The Journal of Physical Chemistry C

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Thermal Conductivity of Few-Layer PtS2 and PtSe2 Obtained from Optothermal Raman Spectroscopy
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2021-07-15 , DOI: 10.1021/acs.jpcc.1c02522
Shiqi Yin ₁ , Weitao Zhang ₁ , Chaoyang Tan ₁ , Lijie Chen ₁ , Jiawang Chen ₁ , Gang Li ₁ , Hanlin Zhang ₁ , Yu Zhang ₁ , Weike Wang ₂ , Liang Li _{1,

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Affiliation

Two-dimensional (2D) noble transition-metal dichalcogenides (NTMDs) have drawn widespread attention due to the promising applications in electronics and optoelectronics. Here, we studied and measured the thermal transport properties of few-layer PtSe₂ and PtS₂ using an optothermal Raman technique. First, we obtained the temperature- and laser-correlative Raman spectra of PtS₂ and PtSe₂ with disparate thicknesses. It is found that with the temperature and laser power increase, the A_1g and E_g modes of all specimens show red shifts. The thermal conductivity values can be extracted from these data, which are correlated with the first-order coefficients of study on the relationship between temperature and laser power. The resulting thermal conductivities are 85.6 ± 7.70 and 40.4 ± 4.67 W/(m·K) for 4 nm PtS₂ and 4.5 nm PtSe₂ at room temperature, respectively. The results of this work help in the design of thermal management NTMD-based devices.

中文翻译：

从光热拉曼光谱获得的少层 PtS2 和 PtSe2 的热导率

二维 (2D) 贵重过渡金属二硫属化物 (NTMD) 由于在电子和光电子领域的有前景的应用而引起了广泛关注。在这里，我们使用光热拉曼技术研究和测量了少层 PtSe ₂和 PtS ₂的热传输特性。首先，我们获得了具有不同厚度的 PtS ₂和 PtSe ₂的温度和激光相关拉曼光谱。发现随着温度和激光功率的增加，A _1g和E _g所有标本的模式显示红移。可以从这些数据中提取热导率值，这些数据与研究温度和激光功率之间关系的一阶系数相关。在室温下，4 nm PtS ₂和4.5 nm PtSe _{2 的}热导率分别为85.6 ± 7.70 和40.4 ± 4.67 W/(m·K) 。这项工作的结果有助于设计基于 NTMD 的热管理设备。

更新日期：2021-07-29

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