Abstract
The paper reports on the barrier longwave infrared nBnn+ detector based on InAs/InAsSb (xSb = 0.38) type-II superlattice operating under thermoelectrical cooling (> 190 K). That active layer exhibits cut-off wavelength ~ 10 μm at 230 K. AlSb was proved to minimize barrier in valence band in analysed temperature range and assumed architecture. The highest detectivity of the simulated structure was assessed at the level of ~ 109 cm Hz1/2/W at T ~ 230 K assuming immersion contribution. The barrier detector performance was compared to HgCdTe detectors with ~ 10.6 μm cut-off wavelength at 230 K and ~ 13 μm cut-off wavelength at 195 K.
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