Nonequilibrium Green's function theory of coherent excitonic effects in the photocurrent response of semiconductor nanostructures

Abstract

Excitonic contributions to absorption and photocurrent generation in semiconductor nanostructures are described theoretically and simulated numerically using steady-state non-equilibrium Green's function theory. In a first approach, the coherent interband polarization including Coulomb corrections is determined from a Bethe-Salpeter-type equation for the equal time interband single-particle charge carrier Green's function. The effects of excitonic absorption on photocurrent generation are considered on the same level of approximation via the derivation of the corresponding corrections to the electron-photon self-energy.

8 pages, 4 figures

References in corpus (5)

• Microscopic non-equilibrium theory of quantum well solar cells
• Theory and simulation of quantum photovoltaic devices based on the non-equilibrium Green's function formalism
• Quantum-kinetic theory of photocurrent generation via direct and phonon-mediated optical transitions
• Theory and simulation of photogeneration and transport in Si-SiOx superlattice absorbers
• Effective microscopic theory of quantum dot superlattice solar cells

Cited by in corpus (2)

• Hypergeometric resummation of self-consistent sunset diagrams for electron-boson quantum many-body systems out of equilibrium
• Nonequilibrium Green's Function simulation of Cu2O photocathodes for photoelectrochemical hydrogen production