Dark current-free multiquantum well superlattice infrared detect

Details Dark current-free multiquantum well superlattice infrared detect Dark current-free multiquantum well superlattice infrared detect

1989-12-27

1991-12-31

Jackson, Jr., Jerome

357 16, 357 4, H01L 2714, H01L 3106, H01L 29205

Patent

active

050775936

ABSTRACT:
A multiquantum well superlattice photodetector for detecting long wavelength infrared radiation in which dark current is reduced by a blocking layer. The tunneling component of the dark current in a multiquantum well photodetector is substantially eliminated by placing a blocking layer at one end of the superlattice. The blocking layer has a potential energy barrier having a height at the same level of the barrier layers of the superlattice. The thickness of the blocking layer is substantially greater than the barrier layers of the superlattice to prevent charge carriers which tunnel through the superlattice from reaching the ohmic contact.

REFERENCES:
patent: 4598164 (1986-07-01), Tiedje et al.
Das et al., Appl. Phys. Lett., 51(15) Oct. 12, 1987, p. 1164, "Performance . . . Photodiode".

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