Abstract
All-inorganic cesium lead halide (CsPbBr3) perovskite quantum dots (QDs), as one kind of promising materials, have attracted considerable attention in optoelectronic applications. Herein, we synthesized the colloidal CsPbBr3 QDs with tunable photoluminescence (PL) (493–531nm) by adjusting the reaction temperatures, which revealed narrow emission bandwidths of about 25nm. The average diameters of the QDs could be adjusted from 7.1 to 12.3nm as the temperature increased from 100°C to 180°C. Moreover, the radiative lifetimes of CsPbBr3 QDs were measured to be ~ 2ns, and the single QD fluorescence intensity time trace results demonstrated its suppressed blinking emission. Moreover, green light emitting diodes by using CsPbBr3 QDs casted on blue LED chips were further fabricated, which provided potential applications in the field of display and lighting technology.
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