Precise Control of Green to Blue Emission of Halide Perovskite Nanocrystals Using Terbium Chloride as Chlorine Source

• Main Authors: Wenqiang Deng, Ting Fan, Jiantao Lü, Jingling Li, Tingting Deng, Mingqi Liu
• Format: Article
• Language: English
• Published: MDPI AG 2021-09-01
• Series: Nanomaterials
• Subjects: room temperature assisted recrystallization; nanocrystalline; spectrum control
• Online Access: https://www.mdpi.com/2079-4991/11/9/2390
• ISSN: 2079-4991

CsPbCl_xBr_3-x nanocrystals were prepared by ligand-assisted deposition at room temperature, and their wavelength was accurately adjusted by doping TbCl₃. The synthesized nanocrystals were monoclinic and the morphology was almost unchanged after doping. The fluorescence emission of CsPbCl_xBr_3-x nanocrystals was easily controlled from green to blue by adjusting the amount of TbCl₃, which realizes the continuous and accurate spectral regulation in the range of green to blue. This method provides a new scheme for fast anion exchange of all-inorganic perovskite nanocrystals in an open environment at room temperature.