Fig. 1. (a–d) Bright field transmission electron microscopy (TEM) images of four different CsPbI3 NCs, revealing their cubic shape and sizes of 7, 9, 11, and 17 nm. The solutions have low polydispersion and narrow size distribution. (e) Size distribution histogram of the imaged NCs (statistics: 200 per size), showing narrow distributions (±1 nm) for the smaller sizes, and a broader distribution (±4 nm) for the 17 nm NCs.
