Extrinsic Green Photoluminescence from the Edges of 2D Cesium Lead Halides
Extrinsic Green Photoluminescence from the Edges of 2D Cesium Lead Halides
Since the first report of the green emission of 2D all-inorganic CsPb2 Br5 , its bandgap and photoluminescence (PL) origin have generated intense debate and remained controversial. After the discovery that PL centers occupy only specific morphological structures in CsPb2 Br5 , a two-step highly sensitive and noninvasive optical technique …