期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 7, 页码 8437-8445出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b20499
关键词
well-behaved; gallium oxide; field-effect transistors; Nb-doped; temperature dependence; harsh environment
资金
- National Natural Science Foundation of China [61874034, 51861135105, U1632121]
- Natural Science Foundation of Shanghai [18ZR1405000]
For the first time, we report the successful fabrication of well-behaved field-effect transistors based on Nb-doped beta-Ga2O3 nanobelts mechanically exfoliated from bulk single crystals. The exfoliated beta-Ga2O3 nanobelts were transferred onto a purified surface of the 110 nm SiO2/Si substrate. These Nb-doped devices showed excellent electrical performance such as an ultrasmall cutoff current of similar to 10 fA, a high current on/off ratio of >10(8), and a quite steep subthreshold swing (SS, similar to 120 mV/decade). Furthermore, we investigated the temperature dependence down to 200 K, providing insightful information for its operation in a harsh environment. This work lays a foundation for wider application of Nb-doped beta-Ga2O3 in nano-electronics.
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