Effective microscopic theory of quantum dot superlattice solar cells

TL;DR

This paper presents a quantum dot orbital tight-binding non-equilibrium Green's function method for simulating quantum dot superlattice solar cells, enabling efficient modeling of large-scale devices with multiple quantum dot layers.

Contribution

It introduces a novel simulation approach that coarse-grains the Green's function to model extended quantum dot solar cell devices effectively.

Findings

Efficient simulation of large quantum dot superlattice devices.

Accurate modeling of absorption and conduction mediated by quantum dot states.

Enables design of advanced quantum dot solar cells.

Abstract

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 mediated by quantum dot states. By the use of basis states localized on the quantum dots, the computational real space mesh of the Green's function is coarse-grained from atomic resolution to the quantum dot spacing, which enables the simulation of extended devices consisting of many quantum dot layers.