High performance MUM diode based on cobalt oxide/titanium oxide

摘要

Optical rectennas for infrared energy harvesting commonly incorporate metal/double-insulator/ metal diodes. Required diode characteristics include high responsivity and low resistance near zero bias with a sub-micron area, which have not been obtainable simultaneously. Diodes based on a new material set, Co/Co_3O_4/TiO_2/Ti and an area of 0.071 μm~2, provide a median maximum responsivity of 4.1 A/W, a median zero-bias responsivity of 1.2 AAV, and a median resistance of 14 kΩ. The highest performing diode has a maximum responsivity of 4.4 AAV, a zero-bias responsivity of 2.2 AAV, and a resistance of 18 kΩ.