Hydrodynamic and Energy Transport Model-Based Hot-Carrier Effect in GaAs pin Solar Cell

Effect of hot-carrier energy relaxation on main properties of collapsing field domains in avalanching GaAs

A quantitative model for charge carrier transport, trapping and recombination in nanocrystal-based solar cells

Improving devices incorporating solution-processed nanocrystal-based semiconductors requires a better understanding of charge transport in these complex, inorganic-organic materials. Here we perform a systematic study on PbS nanocrystal-based diodes using temperature-dependent current-voltage characterization and thermal admittance spectroscopy to develop a model for charge transport that is ap...

Hot Carrier-Based Near-Field Thermophotovoltaic Energy Conversion.

Near-field thermophotovoltaics (NFTPV) is a promising approach for direct conversion of heat to electrical power. This technology relies on the drastic enhancement of radiative heat transfer (compared to conventional blackbody radiation) that occurs when objects at different temperatures are brought to deep subwavelength distances (typically <100 nm) from each other. Achieving such radiative he...

Limitations of Hydrodynamic and Energy-Transport Models

Accurate description of nonlocal hot-carrier phenomena in modern semiconductor devices is becoming very important considering the rapid reduction of the feature size. Frequently used carrier transport models are the traditional drift-diffusion model and extended models which also consider the average carrier energy as an independent solution variable. While the drift-diffusion model is not capa...

Subpicosecond carrier transport in GaAs surface-space-charge fields.

Above-band-gap pulsed optical excitation of electron-hole pairs within the surface-space-charge region of semiconductors alters the surface-space-charge field via free-carrier transport. We report on the direct observation of this ultrafast transient screening and the associated charge-carrier transport by applying reflective electro-optic sampling (REOS) with subpicosecond time resolution to (...