The hot carrier solar cells (HCSCs) is one of the most promising advanced concept solar
cells. It aims to prevent or reduce the dominant energy loss from hot carrier thermalization …

The hot carrier solar cell aims to significantly boost the power conversion efficiency through
fully utilizing the carrier thermalization energy loss. To realize such ultraefficient solar cells, it …

The rapid development of the computational methods based on density functional theory, on
the one hand, and of time-, energy-, and momentum-resolved spectroscopy, on the other …

The ultrafast coupling dynamics of coherent optical phonons and the photoexcited electron-
hole plasma in the indirect gap semiconductor GaP are investigated by experiment and …

We report on the intrinsic optical generation and detection of coherent acoustic phonons at
(001)-oriented bulk Si and GaP without metallic phonon transducer structures …

The relaxation of hot electrons in semiconductors is pivotal for both energy harvesting
processes and optoelectronics. Utilizing a self-developed non-adiabatic molecular dynamics …

Thin GaP films can be grown on an exact Si (0 0 1) substrate with nearly perfect lattice
match. We perform all-optical pump–probe measurements to investigate the ultrafast …

We develop a theory of energy relaxation in semiconductors and insulators highly excited by
the long-acting external irradiation. We derive the equation for the non-equilibrium …

For understanding of carrier behavior in semiconductors, it is important to measure the
carrier relaxation time. In the present study, the relaxation times of inter-valley transition from …

The electron energy relaxation in semiconductors and insulators after high-level external
excitation is analysed by a semi-classical approach based on a kinetic equation of the …