“Bulk crystal techniques confine infrared light to around 97% of its wavelength ... to MIT), but can also be thought of as sound energy. Both photons and phonons deal in the realm of excitations ...

This work reports the design of an efficient multiband UC system based on Ln3+/Yb3+-doped core-shell upconversion ...

WSPV systems are designed to transmit light at the wavelengths most beneficial for ... methods can effectively share sunlight between energy generation and crop production, though full-scale ...