A mixed passivation strategy is deployed to produce monodisperse and pure CsPbBr3
nanocrystals under ambient condition via post treatment using ZnBr2 in mixed organic
solvents. This room temperature synthesis route provides precise size and shape control,
and colloidal nanocubes or nanospheres can be obtained depending on the choice of
organic solvents. Any secondary phases' nucleation was inhibited. The ZnBr2 can reduce
the Br− vacancies at the surface termination layers, thus enhancing their properties. This …