Global ETD Search
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Showing 1 to 5 of 5 for “"phonon bottleneck"”.
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Carrier Dynamics in Perovskite Nanocrystals
… high-efficiency solar cells. Ultrafast carrier-phonon interactions in semiconductors represent a major loss of the excess energy of photoexcitations above the bandgap. We demonstrate approaches to suppress the relaxation process, which may allow the full photon energy to be usefully extracted …
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Transient extreme ultraviolet spectroscopy of semiconductors
… The distributions show rapid cooling by carrier-phonon coupling in the first few hundred fs followed by slow cooling due to the hot-phonon bottleneck effect for tens to hundreds of ps. The cooling dynamics differ, indicating that the electron-phonon and hole-phonon coupling pathways are …
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Fabrication and Device Applications of Self Assembled Nanostructures
… that the latter is most likely limited by spin-phonon interaction. Based on the measured data, we infer that the single-particle T2 time in Alq3 is probably long enough to meet Knill's criterion for fault-tolerant quantum computing even at room temperature. Alq3 is also an optically active …
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Optical hot carrier solar cell: A general method of spectrum management in photovoltaics
… and first-principle calculations. A stronger phonon bottleneck effect was shown in hybrid perovskites than in their inorganic counterparts to prolong the carrier cooling period. At least a 10 times slower carrier-phonon relaxation rate was observed in FAPbb comparing to the cesium-based …
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Magnetism and superconductivity out of equilibrium: Towards ultrafast superconducting spintronics
… can be adequately described by considering the phonon-bottleneck effect through the Rothwarf-Taylor model. Moreover, we observe that the picosecond melting process is critically slowed down when the photoexcitation intensity is commensurate with the superconductivity condensation energy, which …