Enhanced Photo Sensing and Lowered Power Consumption in Concentric MIS Devices by Monitoring Outer Ring Open-Circuit Voltage with Biased Inner Gate
Journal
IEEE Transactions on Electron Devices
Journal Volume
68
Journal Issue
7
Pages
3417-3423
Date Issued
2021
Author(s)
Huang C.-Y
Abstract
Concentric metal-insulator-semiconductor (MIS) structure is used as a photo sensor. Generally, the outer ring acts as gate and the inner circle acts as sensor. In this article, by changing the sensing method from measuring light current to measuring open-circuit voltage of floating sensor, power consumption is considerably lowered. Moreover, by exchanging conventional role of inner device and outer ring, photo-sensitivity under extremely weak light is also highly enhanced, and it results from asymmetric coupling effect of inner circle and outer ring. Furthermore, our device shows great performance as well when using light current as alternative sensing signal in the conventional way. ? 1963-2012 IEEE.
Subjects
Metal-insulator-semiconductor (MIS) structure
photodetector
responsivity
sensitivity
sensor
Electric power utilization
Metal insulator boundaries
MIS devices
Open circuit voltage
Timing circuits
Asymmetric coupling
Metal insulator semiconductor structures
Photo-sensors
Ring opens
Sensing signals
Weak lights
Image enhancement
Type
journal article