LIU Jinlong (1985-), male, Ph.D., Professor. E-mail: liujinlong@ustb.edu.cn
Diamond as a representative of ultra-wide bandgap semiconductor material has attracted recent attention. Although some progress is made in material preparation, device development and performance, semiconductor doping technology is not resolved so far. Hydrogen-terminated (C-H) diamond is widely used in microwave power devices due to its typical two-dimensional hole gas, but it has some problems such as poor stability and high interface state concentration. In contrast, silicon-terminated (C-Si) diamond that emerged in recent years has some advantages of lower interface state density, higher threshold voltage, carrier density, and stability rather than C-H diamond. C-Si diamond electronics exhibit the enhanced properties with high threshold voltages through an unclear mechanism. This review analyzed the structure and conduction mechanism of C-H diamond, the main problems that limit its development, represented the conduction mechanism, preparation method and corresponding interface structure of C-Si diamond, and discussed the performance level of C-Si diamond MOSFETs. In addition, the existing problems in the development of C-Si diamond were also discussed, and its future development was prospected.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |