Green Light-Responsive D-π-A-π-D Quinoxaline Emitters for Luminescent Solar Concentrators: Potential Integration in Agrivoltaic Systems

The integration of photovoltaic technologies within agricultural settings, also known as agrivoltaics, is attracting increasing attention as a sustainable approach to ensure both clean energy and food supply. The success of this strategy relies on the development of innovative materials that can selectively convert specific wavelengths into energy while being transparent to photosynthetically relevant light. To this aim, here we report our endeavors in the synthesis of a new class of D-pi-A-pi-D quinoxaline fluorophores and their use in the preparation of wavelength-selective luminescent solar concentrators. The dyes were expeditiously prepared following a direct arylation protocol and extensively characterized by spectroscopic analyses and computational studies. They present high light harvesting ability in the green region of the visible spectrum and good emission properties, which were fully retained in the solid state when embedded into a poly methyl methacrylate (PMMA) matrix. These materials were employed to construct LSC devices of promising efficiency, fostering further developments for the use of wavelength-selective LSC in agrivoltaic systems.We report a new family of quinoxaline-based dyes for the assembly of luminescent solar concentrators (LSC) with promising performances for applications in agrivoltaic technologies. These materials are transparent to the photosynthetically relevant green radiations, while strongly absorb other wavelengths with good emission in the red region of the visible spectrum. image