Research / 2021 / Article / Fig 4

Research Article

Stable and Efficient Red Perovskite Light-Emitting Diodes Based on Ca2+-Doped CsPbI3 Nanocrystals

Figure 4

(a) The PL area evolution with increasing storing time in ambient condition; (b) images of the Ca2+-doped CsPbI3 NC solutions under daylight before and after 147-day storage (from left to right: , 0.35%, 0.40%, 1.20%), and (c–f) TEM images of Ca2+-doped CsPbI3 NCs after 147-day storage.