Visible‐to‐Ultraviolet Light Conversion: Materials and Applications

Abstract

Photon frequency conversion using optical materials is a common strategy for light generation and utilization. Materials capable of visible‐to‐ultraviolet light conversion have attracted particular attention due to their potential applications in nonlinear optics, biophotonics, as well as environmental sciences. There are four main mechanisms of visible‐to‐ultraviolet light conversion processes, including second‐harmonic generation, two‐photon absorption, lanthanide‐based upconversion, and triplet–triplet annihilation. Here, we collectively review recent developments in visible‐to‐ultraviolet light conversion materials and present the emerging applications. We also highlight the prospects and challenges for further development in this field.