通过铵调制实现球磨富氯Cs(NH)PbClBr纳米晶体的可调谐深蓝色发光。

Tunable deep-blue luminescence from ball-milled chlorine-rich Cs(NH)PbClBr nanocrystals by ammonium modulation.

作者信息

Xiao Hongfei, Xiong Hao, Li Ping, Jiang Linqin, Yang Aijun, Lin Lingyan, Kang Zhenjing, Yan Qiong, Qiu Yu

机构信息

College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China.

Key Laboratory of Green Perovskites Application of Fujian Provincial Universities, College of Electronics and Information Science, Fujian Jiangxia University, Fuzhou 350108, China.

出版信息

Chem Commun (Camb). 2022 Mar 18;58(23):3827-3830. doi: 10.1039/d1cc07125d.

DOI:10.1039/d1cc07125d

PMID:35234752

Abstract

For the first time, a novel class of deep-blue (DB)-emitting Cs(NH)PbClBr (0.3 ≤ ≤ 1) perovskite nanocrystals (PNCs) were prepared by a facile ligand-assisted one-step ball milling method. The resulted PNCs are characterized by high chlorine content (66.7%) and excellent color purity. Their photoluminescence position can be finely modulated from 434 nm to 447 nm, which extends notably beyond the current Rec. 2020 color standard, by the NH content. Among them, Cs(NH)PbClBr shows the highest quantum yield close to 40%. The PNCs exhibit high phase and optical stability under ambient conditions and UV light according to the NH content. This work offers a new avenue to produce DB perovskites for future full-color displays and optoelectronics.

摘要

首次通过简便的配体辅助一步球磨法制备了一类新型的发射深蓝（DB）光的Cs(NH)PbClBr（0.3≤≤1）钙钛矿纳米晶体（PNCs）。所得的PNCs具有高氯含量（66.7%）和优异的色纯度。通过改变NH含量，它们的光致发光位置可在434纳米至447纳米之间进行精细调节，显著超出了当前的Rec. 2020色彩标准。其中，Cs(NH)PbClBr的量子产率最高，接近40%。根据NH含量，这些PNCs在环境条件和紫外光下表现出高相稳定性和光学稳定性。这项工作为未来全彩显示和光电子学领域生产深蓝色钙钛矿提供了一条新途径。