Table 1.
Physical properties of 2D Te and other 2D materials
| Material | Bandgap (eV) | Room-temperature carrier mobility (cm2 V−1 s−1) | Room-temperature thermal conductivity (W m−1 k−1) | Environmental stability | Optical absorbance per layer | Refs. |
|---|---|---|---|---|---|---|
| 2D Te |
0.35–1.265 Direct bandgap |
~103 | 2.16 and 4.08 (armchair and zigzag directions) | ~ 2 months | ~ 2–3% (774 nm) and ~ 6–9% (388 nm) | [25] |
| Graphene | 0 | ~ 2.5 × 104 | 3080–5150 | ~ 2.5 months | ~ 2.3 ± 0.2% | [5, 103] |
| BP |
0.3–1.5 Direct bandgap |
~ 103 | 34 ± 4 and 86 ± 8 (armchair and zigzag direction) | ~ 50 h | ~ 1–1.5% (774 nm) and 2–3% (388 nm) | [104] |
| MoS2 |
0.75–1.89 Indirect to direct bandgap |
~ 480 | 101.43 ± 1.13 and 110.30 ± 2.07 (armchair and zigzag direction) | ~ 3 months | ~ 10% (688 nm) to 30% (442 nm) | [105, 106] |
| MoSe2 |
0.80–1.58 Indirect to direct bandgap |
~ 50 | 43.88 ± 1.33 and 41.63 ± 0.66 (armchair and zigzag direction) | ~ 21 days | ~ 10% (775 nm) to 30% (476 nm) | [107, 108] |
| WS2 |
0.75–1.91 Indirect to direct bandgap |
~ 968 | 32 and 53 (monolayer and bilayer) | ~ 2 weeks | ~ 10% (620 nm) to 30% (430 nm) | [109, 110] |
| WSe2 |
0.90 to 1.54 Indirect to direct bandgap |
~ 500 | 3.935 | ~ 30 days | ~ 10% (750 nm) to 30% (430 nm) | [111, 112] |