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Ge nanocrystals (Ge NCs) embedded in a multilayered superlattice structure have been fabricated and investigated. The presence of Ge NCs was confirmed by Raman scattering and X-ray diffraction measurements. The average size of Ge NCs was modulated by the sputtering time of Ge-rich layer and possible mechanisms have been proposed. The blue shift of optical absorption edge was observed with the decrease...
The concept of the hot carrier cell is to absorb a wide range of photon energies and to separate the resulting “hot” carriers before thermalisation within a narrow range of energies onto external electrodes.Proof of concept of selective energy contacts has been demonstrated for double barrier resonant structures using Si quantum dots for resonant energy levels using current–voltage measurement with...
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