Probing the Temperature-Dependent Thermal Conductivity of Violet Phosphorus via Optothermal Raman Spectroscopy
The temperature-dependent thermal conductivity of violet phosphorus on a perforated SiO<sub>2</sub>/Si substrate has been investigated via optothermal Raman spectroscopy. The obtained temperature coefficients of the Tg mode and P<sub>tub</sub> mode of the violet phosphorus sample are -0.01268 and -0.01789 cm<sup>-1</sup> K<sup>-1</sup>, respectively. On the basis of the temperature coefficients and power coefficients, the thermal conductivity of the violet phosphorus has been calculated to be 44.642 ± 4.995 W/mK at room temperature, which is higher than that of other two-dimensional materials such as black phosphorus and MoS<sub>2</sub> due to the effect of boundary scattering and the phonon mean free path. Additionally, the thermal conductivity of violet phosphorus decreases as a power exponential function of the temperature, which is primarily associated with the phonon mean free path and phonon group velocity. This work provides a scientific foundation for thermal management and heat dissipation in designing micro-nano devices with violet phosphorus.
Authors
- Xukun Feng
- Yuanyuan Huang (ORCID: https://orcid.org/0000-0001-7752-4054)
- Xinlong Xu (ORCID: https://orcid.org/0000-0002-3034-810X)
- Mingjian Shi (ORCID: https://orcid.org/0000-0003-1569-9822)
- Jinying Zhang (ORCID: https://orcid.org/0000-0002-2634-6275)
- M. Cai
- Jiayu Tan
- De Lu
- Mengen Zhang
Institutions
- Northwest University (CN)
- State Key Laboratory of Electrical Insulation and Power Equipment
- Xi'an Jiaotong University (CN)
Publication Details
- Journal
- The Journal of Physical Chemistry Letters
- Published
- 2024-08-23
- DOI
- https://doi.org/10.1021/acs.jpclett.4c02000
- Citations
- 2
- Primary Topic
- Thermal properties of materials
- Type
- article
- Field-Weighted Citation Impact
- 0.23
Funders
- National Natural Science Foundation of China