Browsing by Author "Lin, Chi-Yi"

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The impact of electrical contacts and contact-induced ultralow noise amplitudes in layered transistors
(2016-12)
Hsu, Chih-Kai
;
Lin, Chi-Yi
;
Li, Wenwu
;
Sun, Huabin
;
Xu, Yong
Electrical contacts made of conducting channels with external circuitry significantly impact electronic performances, in particular for two-dimensional semiconductors. This work presents a systematic study of back-to-back Schottky contacts to a layered compound of semiconducting flakes through static and dynamic electrical measurements and the first demonstration of Schottky barrier-dominated, p-type PbSnS2 field-effect transistors. In the static analysis, the Schottky barrier height of the layered transistors can be modulated by applied electrostatic fields, while the contact-dominated fluctuations render to the 1/f electric noise and induce a normalized noise amplitude in the order of 10(-9)-10(-8). Such an ultralow-noise amplitude, which is never observed in other layered semiconducting transistors, is ascribed to the existence of Schottky barriers. Our experimental results provide a nuanced perspective for advancing the understanding of performance limit with increasing numbers of layers for electronic development.