High thermal conductivity of high-quality monolayer boron nitride and its thermal expansion
Deakin University · Queen's University Belfast · +1 more institution
Abstract
Heat management has become more and more critical, especially in miniaturized modern devices, so the exploration of highly thermally conductive materials with electrical insulation is of great importance. Here, we report that high-quality one-atom-thin hexagonal boron nitride (BN) has a thermal conductivity (κ) of 751 W/mK at room temperature, the second largest κ per unit weight among all semiconductors and insulators. The κ of atomically thin BN decreases with increased thickness. Our molecular dynamic simulations accurately reproduce this trend, and the density functional theory (DFT) calculations reveal the main scattering mechanism. The thermal expansion coefficients of monolayer to trilayer BN at 300 to…
Citation impact
- FWCI
- 20.46
- Percentile
- 100%
- References
- 60
Authors
10Topics & keywords
- Materials science
- Thermal conductivity
- Boron nitride
- Monolayer
- Semiconductor
- Thermal expansion
- Electrical conductor
- Thermal stability
- Affordable and clean energy