Superlattice devices applications in THz frequency range

Pavelyev, D. G.; Kochurinov, Yuri; Ren, Yuan; Gao, J. R.; Hovenier, N.; Hayton, D. J.; Baryshev, A.; Khudchenko, Andrey

doi:10.1109/irmmw-thz.2012.6380134

Cited by 2 publications

(1 citation statement)

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“…Strained layer superlattice devices based on narrow bandgap semiconductors have brought about a small revolution in solid-state technology. The high performance of these devices make them ideal candidates for various applications across a broad band of the electromagnetic spectrum. − The manufacturing limitations in the narrow bandgap semiconductors, however, diminish the performance characteristics of the conventional detectors. The performance is mainly limited by the difficulty of controlling the doping levels and defect concentrations of the small forbidden gap, thus performance is diminished through the defects .…”

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confidence: 99%

Study of the Natural Auger Suppression Mechanism in Heterostructures through Heteroboundary Engineering

Slonopas

Tomkinson

2017

J. Phys. Chem. A

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Planar superlattice devices revolutionized our approach to solid-state technology by reducing the Shockley-Read-Hall losses to negligible levels. Despite these achievements, significant efficiency losses are found in current devices presumably caused by the Auger recombinations. This work present the theoretical considerations of the Auger recombination suppression through heterostructure engineering. It is found that Auger recombinations are suppressed through the heterobarrier-carrier interactions. It is shown that a minima in Auger recombinations exists in type-II and III heterostructures, and can be reached through proper conduction and valence band alignments. Furthermore, the careful consideration of the heterostructure enables natural Auger suppression for high operating temperatures. Dark current based on the optimized heterostructure was computed and found to be over an order of magnitude below the currently reported measurements for the superlattice and QD devices. This research provides crucial information about the underlying physics behind the Auger recombination, enabling future superlattice and quantum dot device optimization.

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