Quantum confinement in nanoscale silicon: The correlation of size with bandgap and luminescence

Behren, J. von; Buuren, T. van; Zacharias, Mario; Chimowitz, Eldred H.; Fauchet, Philippe M.

doi:10.1016/s0038-1098(97)10099-0

Cited by 144 publications

(90 citation statements)

References 22 publications

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“…Meanwhile, we also observed that the transmission at the low energy (the plateau region), T 0 , increases with porosity. The blue-shifts of the transmission are correspondent to the results given elsewhere [20][21][22][23][24][25]. Figure 2 shows four Raman spectra of the free-standing p PS films with porosities of 58, 68, 79, and 87%.…”

Section: Resultssupporting

confidence: 80%

“…Kanemitsu [14] reported that there was no clear size dependence of the PL peak energy, whereas an obvious blue-shift of optical absorption was observed with a decrease in the average diameter of Si crystallites. Behren et al [23] demonstrated unambiguously and quantitatively the role of quantum confinement in the optical properties of PS with porosities up to 92%. Recently, we have compared the PL spectra with the absorption spectra of PS samples with porosities in a wide range [24][25][26].…”

Section: Introductionmentioning

confidence: 97%

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Optical absorption property of oxidized free-standing porous silicon films

Guo

Liu

et al. 2000

Pure and Applied Chemistry

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Abstract:We have systematically studied the evolution of the optical absorption of freestanding PS films during thermal oxidation at 200°C in air. Our experiment results show the evolution of transmission curve is quite complicated, which red-shifts first and then blueshifts during thermal oxidation. At the same time, the transmission at the low energy decreases first and then increases. We propose an explanation as follows: (1) the energy gap associated with each crystallite should increase during thermal oxidation process, due to the quantum confinement effect; (2) the energy gap should decrease with an increase in oxygen termination atoms. Both the increasing of the gap due to the quantum confinement effect and the decreasing of the gap due to the Si-O bond formation cause a complicated evolution of optical absorption.

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Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 97%

Optical absorption property of oxidized free-standing porous silicon films

Guo

Liu

et al. 2000

Pure and Applied Chemistry

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show abstract

“…The measured band gap is in agreement with realistic theories and the Stokesshift between band gap and luminescence energies coincides with the exciton binding energy predicted by these theories. These results demonstrate unambiguously and quantitatively the role of quantum confinement in the optical properties of this indirect gap semiconductor (Behren et al, 1998). Optical confinement effects in nanostructured materials enable new innovative device concepts that can radically enhance the operation of traditional semiconductor devices.…”

Section: Nanoscale Optical Confinementsupporting

confidence: 53%