期刊
APPLIED PHYSICS LETTERS
卷 107, 期 14, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4933034
关键词
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资金
- Major State Basic Research Development Program [2013CB922302]
- Natural Science Foundation of China [11374320, 61440063, 61574152]
- Natural Science Foundation of Shanghai [14JC1406500]
Phototransistors based on two dimensional semiconductors have drawn increasing attention in recent years. GaSe is a typical semiconductor with a layered structure. In this work, the ultrathin GaSe nanosheets were exfoliated from commercially available crystals using a micromechanical cleavage technique. Then, the nanosheets were used to fabricate field effect transistors (FETs) on Si/SiO2 substrates with interdigitated electrodes. The electrical and optoelectronic properties of the FET were characterized. The phototransistor based on a GaSe nanosheet had a high photoresponsivity (similar to 2200 mA/W) and a high I-photo/I-dark (photoresponse current over dark current) ratio of almost 10(3). (C) 2015 AIP Publishing LLC.
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