Fluoride Ion Passivation of CsPbBr3 Nanocrystals at Room Temperature for Highly Efficient and Stable White Light-Emitting Diodes

phosphors on a blue chip, the fabricated white light emitting diode shows a high luminous efficiency of 147.8 lm/W, a wide color gamut (129% for NTSC), and CIE coordinates of (0.3160, 0.3051). Furthermore, the photoluminescence intensity decreased by only 2.9% after 48 h of continuous operation.