Abstract:
Recently, tuning the green emission of CsPbBr3 quantum dots (QDs) to blue through
quantum size and confinement effects has received considerable attention due to its remarkable
photophysical properties. However, the synthesis of such a blue-emitting QD has been challenging.
Herein, supersaturated recrystallization was successfully implemented at room temperature to
synthesize a broadband blue-emitting ZnBr2
-doped CsPbBr3 QD with an average size of ~3 nm
covering the blue spectrum. The structural and optical properties of CsPbBr3 QDs demonstrated
that QD particle size may decrease by accommodating ZnBr2 dopants into the perovskite precursor
solution. Energy-dispersive spectroscopy confirmed the presence of zinc ions with the QDs. This
work provides a new strategy for synthesizing strongly quantum-confined QD materials for photonic
devices such as light-emitting diodes and lighting.
