Recent Advances of Circularly Polarized Luminescence in Photon Upconversion Systems

Abstract

Upconverted circularly polarized luminescence (UC-CPL) is coined by combining two individual concepts of photon upconversion (UC) and circularly polarized luminescence (CPL). It has exhibited great performance and potential applications in various fields, arousing enormous attention from scientists. The emergence, amplification and modulation of UC-CPL can be adjusted through regulation of the UC process and assembled state of emitters. Benefitting from the abundant upconverted photoluminescence mechanisms, we can flexibly build UC-CPL systems with distinct properties. In addition, based on different photophysical processes, the circular polarization of some UC-CPL can be promoted. Furthermore, the practical application of UC-CPL has been confirmed in enantioselective photopolymerization. Thus, in this review, we will briefly highlight the recent development and advances of UC-CPL. We envisage providing a guide for the development of those remarkable chiroptical materials.