84 citations · 469 across the 17 of their papers we have counts for
14 papers · 1 filter
Hot-carrier optoelectronic devices based on semiconductor nanowires
Jonatan Fast, Urs Aeberhard, Stephen P. Bremner +1
In optoelectronic devices such as solar cells and photodetectors, a portion of electron-hole pairs are generated as so called hot carriers with an excess energy that is typically l…
Photocarrier extraction in GaAsSb/GaAsN type-II QW superlattice solar cells
Urs Aeberhard, Alicia Gonzalo, Jose María Ulloa
Photocarrier transport and extraction in GaAsSb/GaAsN type-II quantum well superlattices are investigated by means of inelastic quantum transport calculations based on the non-equi…
A Microscopic Perspective on Photovoltaic Reciprocity in Ultrathin Solar Cells
Urs Aeberhard, Uwe Rau
The photovoltaic reciprocity theory relates the electroluminescence spectrum of a solar cell under applied bias to the external photovoltaic quantum efficiency of the device as mea…
Impact of built-in fields and contact configuration on the characteristics of ultra-thin GaAs solar cells
Urs Aeberhard
We discuss the effects of built-in fields and contact configuration on the photovoltaic characteristics of ultrathin GaAs solar cells. The investigation is based on advanced quantu…
Simulation of Ultra-thin Solar Cells Beyond the Limits of the Semi-classical Bulk Picture
Urs Aeberhard
The photovoltaic characteristics of an ultra-thin GaAs solar cell with gold back reflector are simulated using the standard semi-classical drift-diffusion-Poisson model and an adva…
Impact of nanostructure configuration on the photovoltaic performance of quantum dot arrays
Aude Berbezier, Urs Aeberhard
In this work, a mesoscopic model based on the non-equilibrium Green's function formalism for a tight-binding-like effective Hamiltonian is used to investigate a selectively contact…
Simulation of nanostructure-based and ultra-thin film solar cell devices beyond the classical picture
Urs Aeberhard
In this paper, an optoelectronic device simulation framework valid for arbitrary spatial variation of electronic potentials and optical modes, and for transport regimes ranging fro…
Simulation of light propagation in thin semiconductor films with non-local electron-photon interaction
U. Aeberhard
The propagation of light in layered semiconductor media is described theoretically and simulated numerically within the framework of the non-equilibrium Green's function formalism…
Simulation of nanostructure-based high-efficiency solar cells: challenges, existing approaches and future directions
Urs Aeberhard
Many advanced concepts for high-efficiency photovoltaic devices exploit the peculiar optoelectronic properties of semiconductor nanostructures such as quantum wells, wires and dots…
Theoretical investigation of direct and phonon-assisted tunneling currents in InAlGaAs-InGaAs bulk and quantum well interband tunnel junctions for multi-junction solar cells
Urs Aeberhard
Direct and phonon-assisted tunneling currents in InAlGaAs-InGaAs bulk and double quantum well interband tunnel heterojunctions are simulated rigorously using the non-equilibrium Gr…
Effective microscopic theory of quantum dot superlattice solar cells
U. Aeberhard
We introduce a quantum dot orbital tight-binding non-equilibrium Green's function approach for the simulation of novel solar cell devices where both absorption and conduction are m…
Theory and simulation of quantum photovoltaic devices based on the non-equilibrium Green's function formalism
U. Aeberhard
This article reviews the application of the non-equilibrium Green's function formalism to the simulation of novel photovoltaic devices utilizing quantum confinement effects in low…
Theory and simulation of photogeneration and transport in Si-SiOx superlattice absorbers
U. Aeberhard
Si-SiOx superlattices are among the candidates that have been proposed as high band gap absorber material in all-Si tandem solar cell devices. Due to the large potential barriers f…
Effect of spin-orbit coupling on zero-conductance resonances in asymmetrically coupled one-dimensional rings
Urs Aeberhard, Katsunori Wakabayashi, Manfred Sigrist
The influence of Rashba spin-orbit coupling on zero conductance resonances appearing in one dimensional ring asymmetrically coupled to two leads is investigated. For this purpose,…