Quantum dots have attractive potential for multiple junction and intermediate band solar cells. However, the device level modeling of quantum dot based solar cells is a challenging task, since it inherently requires multiscale approaches combining nano- and micro-scale descriptions at an affordable computational cost. In this work quantum dot solar cells are studied by means of a multiscale model based on a semi-classical transport-Poisson framework enriched by a proper treatment of the quantum dot dynamics. The impact of a few design and physical parameters is investigated, providing better understanding of experimental results reported in literature.
Diffraction gratings have emerged as one of the main strategies for effective light trapping in thin-film solar cells. The simulation of such photonic structures requires computationally intensive 2D or 3D full-wave approaches, which are therefore unfeasible for computer-aided design purposes. This would be even more challenging in view of performing self-consistent coupling with electronic transport models to fully account for carrier collection and carrier-photon interactions. In this work this problem has been addressed by means of a novel and computationally efficient multiphysics approach for coupled electrical-optical simulations, based on the multimodal scattering matrix formalism, wherein the grating is modeled by a scattering matrix that can be easily derived from simulations performed by rigorous coupled wave analysis.
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