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- W1986705087 abstract "Abstract The background carrier concentration is an important factor in the performance of detectors. We have investigated the effect of a variable background doping concentration in the absorber region of an nBn type‐II InAs/GaSb superlattice infrared detector. The doping concentrations were 5 × 10 16 cm ‐3 (non‐intentionally doped, n.i.d.), 1.4 × 10 17 cm ‐3 , 4.0 × 10 17 cm ‐3 , and 3.5 × 10 18 cm ‐3 . The specific detectivity of the detectors was found to dramatically decrease as the doping concentration was increased. This was caused by an increase in dark current density which is attributed to the presence of a quantum well (QW) formed in the valence band. This QW allowed for enhanced electron‐hole recombination at higher doping concentrations. Consequently the n.i.d. device demonstrated the best performance with a zero bias specific detectivity (D*) equal to 1.2 × 10 11 Jones at 77 K. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)" @default.
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- W1986705087 date "2010-06-22" @default.
- W1986705087 modified "2023-09-25" @default.
- W1986705087 title "Heterostructure engineering in Type II InAs/GaSb strained layer superlattices" @default.
- W1986705087 doi "https://doi.org/10.1002/pssc.200983869" @default.
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