Tuning the Emission Wavelength of Lead Halide Perovskite NCs via Size and Shape Control.

ABSTRACT: The advent of lead halide perovskite nanocrystals (NCs), which are easily synthesized, ultralow-cost materials and have an impeccable luminous efficiency, has drastically changed the future perspective of semiconductor quantum dot devices. Although the band gap energy of lead perovskite NCs can be tuned by the halide composition, the instability problem prevails for mixed-halide perovskite NCs, caused by phase segregation due to ion migration when an external electric field or light is applied. To avoid this problem and obtain the stable emission of RGB primary colors, in this study, two synthesis pathways of pure-halide perovskite NCs are proposed. One approach is the modified hot injection method with "centrifugation of a frozen eutectic mixture" to separate small NCs efficiently, and th

SUBMITTER: Leng J 

PROVIDER: S-EPMC8756606 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature