Efficient pure green light-emitting diodes based on formamidinium lead bromide perovskite nanocrystals

By controlling the concentration of FAPbBr3 NCs in toluene solution, the exciton recombination region was precisely confined to the emitting layer, the optimized FA-NLED presents current efficiency (CE) 16.08 cd/A with the CIE of (0.183, 0.763).177