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- W2237246427 abstract "Abstract We have fabricated two-tiered hetero-structures consisting of B δ-doped and P δ-doped Si quantum dots (QDs) embedded in SiO 2 on p- and n-Si(100) by repeating Si-QDs formation by low pressure chemical vapor deposition (LPCVD) using pure SiH 4 and subsequent surface oxidation and modification by remote plasma, and characterized their electroluminescence (EL) in near-infrared region under DC and AC bias applications to semitransparent Au top-electrodes. The observed EL spectra can be deconvoluted into mainly two components peaked at ~ 1.07 and ~ 1.11 eV, which involve recombination processes through impurity levels. The input power dependence of EL intensities shows that two-tiered structure of P-doped and B-doped Si-QDs is effective to improve EL efficiency while a simple stacking of B-doped Si-QDs is suited to low power operation. This indicates that energy relaxation to lowest quantized levels in charge transfer among valency controlled Si-QDs by impurity doping plays a role on recombination of injected electrons and holes." @default.
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- W2237246427 date "2016-03-01" @default.
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- W2237246427 title "Study on electroluminescence from multiply-stacking valency controlled Si quantum dots" @default.
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- W2237246427 doi "https://doi.org/10.1016/j.tsf.2015.10.007" @default.
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