期刊
IEEE TRANSACTIONS ON ELECTRON DEVICES
卷 68, 期 7, 页码 3417-3423出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TED.2021.3082813
关键词
Logic gates; Couplings; Sensors; Voltage measurement; Power demand; Substrates; Schottky diodes; Metal-insulator-semiconductor (MIS) structure; photodetector; responsivity; sensitivity; sensor
资金
- Ministry of Science and Technology, Taiwan [MOST 108-2221-E-002-003-MY2, MOST 109-2622-8-002-003]
This article investigates a concentric metal-insulator-semiconductor (MIS) structure as a photo sensor, achieving improved photo-sensitivity under extremely weak light by changing the sensing method and roles of the inner and outer rings, which also leads to reduced power consumption.
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.
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