Alternative Pathways for Multiple Exciton Generation Solar Cells by Tandem Configurations

TL;DR

This paper explores alternative tandem solar cell configurations inspired by multiple exciton generation cells, aiming to overcome efficiency limitations caused by material imperfections and nonradiative recombination.

Contribution

It reorganizes the detailed balance equation of MEGSCs to resemble that of tandem cells and proposes new approaches for implementing MEGSC-like tandem solar cells.

Findings

Reorganized the detailed balance equation for MEGSCs.

Compared MEGSCs and tandem solar cell equations.

Proposed alternative pathways for MEGSC implementation.

Abstract

Multiple exciton generation solar cells (MEGSCs) undergo low efficiency due to material imperfections such as nonradiative recombination This paper introduces alternative approaches for realizing photovoltaic (PV) devices similar to MEGSCs. Furthermore, we reorganize the detailed balance equation of MEGSCs such that it is similar to that of independent connection tandem solar cells. This is possible because of the spectral dependence of the ideal QY. Finally, we compare these two similar equations and propose alternative approaches for realizing MEGSC-like tandem solar cells. We explain the difficulty in fabricating MEGSCs, which arises from the high rate of non-idealities. In this regard, the deconstruction of the detailed balance equation of MEGSCs can reveal alternative paths for replacing MEGSCs with tandem solar cell configurations.