D. Hirata et al., IMPROVEMENT OF DARK CURRENT-DENSITY OF ALINAS INGAAS METAL-SEMICONDUCTOR-METAL PHOTODETECTOR USING PHOSPHINE-PLASMA-TREATED SCHOTTKY-BARRIER/, JPN J A P 1, 35(3), 1996, pp. 1779-1780
AlInAs/InGaAs metal-semiconductor-metal (MSM) photodetectors with a lo
w dark current density are fabricated using a surface modification pro
cess with phosphine (PH3) plasma. Phosphidization of the AlInAs cap la
yer reduces the surface state density and allows formation of high Sch
ottky barrier with a tunnel metal-insulator-semiconductor (MIS) struct
ure. A dark current density as low as 0.021 pA/mu m(2) at 10 V is obta
ined.