期刊
NANO LETTERS
卷 22, 期 1, 页码 311-318出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c03822
关键词
lead-free double perovskite nanocrystals; moisture-assisted; near-UV emission; 2D nanoplatelets; self-trapped excitons
类别
资金
- Finnish Cultural Foundation [00210670]
- Tampere University, Faculty of Engineering and Natural Sciences
- Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN) [320165]
- Australian government through the Australian Research Council (ARC) under the Centre of Excellence scheme [CE170100026]
This study presents a method for the synthesis of lead-free Cs4CuIn2Cl12 nanocrystals through moisture-assisted approach, showing advantages in PL quantum yield, morphology, and photoluminescence properties. It paves the way for further research on novel lead-free halide perovskite nanocrystals for various applications.
Lead-based halide perovskite nanocrystals (NCs) are recognized as emerging emissive materials with superior photoluminescence (PL) properties. However, the toxicity of lead and the swift chemical decomposition under atmospheric moisture severely hinder their commercialization process. Herein, we report the first colloidal synthesis of lead-free Cs4CuIn2Cl12 layered double perovskite NCs via a facile moisture-assisted hot-injection method stemming from relatively nontoxic precursors. Although moisture is typically detrimental to NC synthesis, we demonstrate that the presence of water molecules in Cs4CuIn2Cl12 synthesis enhances the PL quantum yield (mainly in the near-UV range), induces a morphological transformation from 3D nanocubes to 2D nanoplatelets, and converts the dark transitions to radiative transitions for the observed self-trapped exciton relaxation. This work paves the way for further studies on the moisture-assisted synthesis of novel lead-free halide perovskite NCs for a wide range of applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据