RF Evaluation of Steep Subthreshold Slope “PN-Body Tied SOI-FET”

Author(s):  
Mitsuhiro Yuizono ◽  
Jiro Ida ◽  
Takayuki Mori ◽  
Koichiro Ishibashi
2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Luqi Tu ◽  
Rongrong Cao ◽  
Xudong Wang ◽  
Yan Chen ◽  
Shuaiqin Wu ◽  
...  

AbstractSensitive photodetection is crucial for modern optoelectronic technology. Two-dimensional molybdenum disulfide (MoS2) with unique crystal structure, and extraordinary electrical and optical properties is a promising candidate for ultrasensitive photodetection. Previously reported methods to improve the performance of MoS2 photodetectors have focused on complex hybrid systems in which leakage paths and dark currents inevitably increase, thereby reducing the photodetectivity. Here, we report an ultrasensitive negative capacitance (NC) MoS2 phototransistor with a layer of ferroelectric hafnium zirconium oxide film in the gate dielectric stack. The prototype photodetectors demonstrate a hysteresis-free ultra-steep subthreshold slope of 17.64 mV/dec and ultrahigh photodetectivity of 4.75 × 1014 cm Hz1/2 W−1 at room temperature. The enhanced performance benefits from the combined action of the strong photogating effect induced by ferroelectric local electrostatic field and the voltage amplification based on ferroelectric NC effect. These results address the key challenges for MoS2 photodetectors and offer inspiration for the development of other optoelectronic devices.


2018 ◽  
Vol 24 (8) ◽  
pp. 5695-5699
Author(s):  
Jackuline Moni ◽  
T. Jaspar Vinitha Sundari

Using standardized simulations, we report a meticulous learning of the Junctionless nanowire with tunneling mechanism and the dependence of Subthreshold slope on operational parameters by varying the channel diameter, Gate length and doping concentration using Synopsys Sentaurus TCAD simulations. For the first time, Junctionless Nanowire in the company of tunneling architecture is proposed and explored. Our simulation study shows that a decrease in channel diameter and doping concentration results in higher band to band generation and steeper slope. Junctionless tunneling nanowire of diameter 10 nm, gate length of 20 nm, and uniform doping concentration of 1e19 cm−3 obtains steepest Subthreshold swing of about 8 mV/dec (point) and 52 mV/dec (average), an on/off current ratio of 1010, on current of 10−5 A/um.


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