Exploiting non-trivial spatio-temporal correlations of thermal radiation for sunlight harvesting

TL;DR

This paper demonstrates that exploiting spatio-temporal correlations in sunlight through specific detector geometries can significantly enhance the efficiency of light-harvesting devices, offering new avenues for improved solar energy conversion.

Contribution

It reveals the importance of sunlight correlations in energy harvesting and provides design guidelines for detector geometries to leverage these effects.

Findings

Spatio-temporal correlations in sunlight are significant for energy harvesting.

Optimized detector geometries can improve absorption efficiency.

Design guidelines are provided for realistic incident intensities.

Abstract

The promise of any small improvement in the performance of light-harvesting devices, is sufficient to drive enormous experimental efforts. However these efforts are almost exclusively focused on enhancing the power conversion efficiency with specific material properties and harvesting layers thickness, without exploiting the correlations present in sunlight -- in part because such correlations are assumed to have negligible effect. Here we show, by contrast, that these spatio-temporal correlations are sufficiently relevant that the use of specific detector geometries would significantly improve the performance of harvesting devices. The resulting increase in the absorption efficiency, as the primary step of energy conversion, may also act as a potential driving mechanism for artificial photosynthetic systems. Our analysis presents design guidelines for optimal detector geometries with realistic incident intensities based on current technological capabilities