Purple light out, green light in: Turning low-energy light into high-energy

Purple light out, green light in: Turning low-energy light into high-energy

In the quest to harness solar energy more efficiently, scientists have long grappled with the challenge of utilizing the broad spectrum of sunlight effectively. Conventional solar cells and photocatalysts typically exploit only a narrow range of wavelengths, leaving a significant portion of solar radiation untapped—especially the longer wavelengths that pass through photovoltaic materials without being absorbed. This intrinsic limitation restric…