Alternative Strategies for Maximizing the Output of Multi-Junction Photovoltaic Panels

TL;DR

This paper explores three innovative strategies to optimize multi-junction photovoltaic panels by electrical isolation, absorption, and power electronics, aiming to enhance efficiency and reduce material costs.

Contribution

It introduces three novel strategies for maximizing multi-junction PV output through electrical isolation and power electronics, with a simplified theoretical framework.

Findings

Strategies improve current and voltage matching in multi-junction cells

Theoretical model streamlines design requirements

Potential for increased efficiency and reduced costs

Abstract

Multi-junction photovoltaics provide a logical method of increasing the utilization of solar power for a given area. However, their current design and fabrication methods invoke numerous material and cost complexities that limit their potential, particularly for flat panel paradigms. In this paper, three general strategies based on the electrical isolation of the internal sub-layers are described. These strategies involve current or voltage matching the sub-layers by varying of fractional absorption and areal coverage of individual cells within each sub-layer, as well as modifying their combined output using power electronics. A simplified theoretical description of these strategies is provided for pairs of junction materials that allows a more streamlined description of the requirements.