Local Symmetry Breaking Facilitates Near-Infrared Circularly Polarized Lanthanide Emission in Perovskite Nanocrystals.
Imparting chiroptical activity of lanthanide transitions provides an attractive route to circularly polarized luminescence. However, obtaining intense emission from their Laporte-forbidden f-f transitions while also generating significant rotatory strength remains a formidable challenge in materials design. This work e...