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- W2085035908 abstract "Multiple emission peaks have been observed from surface passivated PbS nanocrystals displaying strong quantum confinement. The emission spectra are shown to be strongly dependent on the excited-state parity. We also find that intraband energy relaxation from initial states excited far above the band-edge is nearly three orders of magnitude slower than that found in other nanocrystal quantum dots, providing evidence of inefficient energy relaxation via phonon emission. The initial-state parity dependence of the photoluminescent emission properties suggests that energy relaxation from the higher excited states occurs via a radiative cascade, analogous to energy relaxation in atomic systems. Such radiative cascade emission is possible from ideal zero-dimensional semiconductors, where electronic transitions can be decoupled from phonon modes." @default.
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- W2085035908 date "2004-08-14" @default.
- W2085035908 modified "2023-09-26" @default.
- W2085035908 title "Evidence for energy relaxation via a radiative cascade in surface-passivated PbS quantum dots" @default.
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- W2085035908 doi "https://doi.org/10.1088/0957-4484/15/9/037" @default.
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