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- W2029042637 abstract "Optical and electrical characterization is carried out on MOS capacitor structures including buried strained Si1−xGex quantum-wells to determine the channel and hetero-interface parameters. Well resolved SiGe band-gap edge Photoluminescence (PL) is observed for all the samples. The energy locations are in agreement with the announced Ge contents and quantum-well thickness. The presence of dislocations is not detected, indicating a good Si/SiGe interface structural quality. The results show that the hole concentration in the quantum-well is a function of the pulse duration (tp) of the excitation signal used for the DLTS spectroscopy. Using the DLTS, the valence-band offset (ΔEv) is determined for various Ge contents up to 35%. This work points out that the coupling of the optical (PL) and electrical (C–V and DLTS) characterization provides a consistent tool for the analysis of Si/SiGe heterostructure based devices." @default.
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- W2029042637 date "1998-08-01" @default.
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- W2029042637 title "Si/SiGe valence band offset determination using photoluminescence and DLTS in SiGe quantum-well MOS capacitors" @default.
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- W2029042637 doi "https://doi.org/10.1016/s0167-9317(98)00242-1" @default.
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