Nanodevices: Record‐Low‐Threshold Lasers Based on Atomically Smooth Triangular Nanoplatelet Perovskite (Adv. Funct. Mater. 2/2019).

In article number 1805553, Yanxia Cui, Shengzhong Liu, and co‐workers report a record‐low‐threshold laser based on atomically smooth triangular nanoplatelet perovskite. Such perovskite nanoplatelets are obtained by fabricating atomically smooth PbI2 nanoplates and converting them to atomically smooth perovskites. The laser emissions have record‐low‐thresholds and high‐quality factors, thus making the scheme suitable for implementation of semiconductor nano‐lasers in a wide range of applications. [ABSTRACT FROM AUTHOR]