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Phase-Engineering-Driven Enhanced Electronic and Optoelectronic Performance of Multilayer In 2 Se 3 Nanosheets.
ACS Applied Materials & Interfaces 2018 August 23
Here, we report electronic and optoelectronic performance of multilayer In2 Se3 are effectively regulated by phase engineering. The electron mobility is increased to 22.8 cm2 V-1 s-1 for β-In2 Se3 FETs, which is 18 times higher than 1.26 cm2 V-1 s-1 of α-In2 Se3 FETs. The enhanced electronic performance is attributed to larger carrier sheet density and lower contact resistance. Multilayer β-In2 Se3 photodetector exhibits an ultrahigh responsivity of 8.8 × 104 A/W under 800 nm illumination, which is 574 times larger than 154.4 A/W of α-In2 Se3 photodetector. Our results demonstrate phase-engineering is a valid way to tune and further optimize electronic and optoelectronic performance of multilayer In2 Se3 nanodevices.
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