 By controlling the nucleation kinetics through high dissociation constant acids or bases, homogenous one-route nucleation of perovskite nanocrystals is achieved, resulting in stable, shape uniform, and narrow-sized distribution green nanocrystals that exhibit excellent stability and efficient electroluminescence with a peak EQE of 24.13% and a lifetime T50 of 54 minutes at 10,000 cd slash m2 this article was authored by Xuanyu Zhang, Chenchen Wang, Jiwei Yao, and others