在全无机核心/外佩洛夫斯基特纳米晶体中的界面B位离子扩散
Shuya Li1, Hanjie Lin1, Chun Chu1
1Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States.
ACS nano
|November 14, 2023
概括
我们开发了无矿核心/外纳米晶体 (NCs),具有增强的稳定性和可调色颜色. 这涉及CsPbCl3NCs上的CsMnCl3外,使Mn扩散成为可调节的光发光.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 光电学是指光电子产品.
背景情况:
- 全无机金属化物矿 (ABX3) 对光电子有前途,但面临着毒性和不稳定性的挑战.
- 使用稳定,无的矿的被动化提供了一条改善环境稳定性和调整光学性能的途径.
- 由于柔软的离子网格,生长核心/外矿石纳米晶体 (NCs) 很困难.
研究的目的:
- 开发一种简单的方法来创建具有增强稳定性和可调节光学特性的核心/外矿NC.
- 调查使用无矿外用于被动化和性能调节的潜力.
- 探索界面B位离子扩散作为实现颜色调性的一种机制.
主要方法:
- 制造的CsPbCl3/CsMnCl3核心/外矿石纳米晶体 (NCs).
- 使用无的CsMnCl3外来使CsPbCl3核心变得无源.
- 通过热回火研究B点Mn离子从外到核心的扩散.
主要成果:
- 在CsPbCl3/CsMnCl3核心/外NC中实现了增强的环境稳定性和改进的光发光量子产量 (QYs).
- 通过介面Mn扩散,证明了色调光发光 (PL),产生了化CsPbCl3核 (Mn:CsPbCl3).
- 展示了可调节的Mn PL发射在600nm左右,取决于热时间.
结论:
- 核心/外矿NC中的界面B位点扩散是同时增强环境稳定性和光学属性调节的可行策略.
- 这种方法为矿材料中带隙工程提供了传统化物离子交换的有希望的替代方案.
- 开发的CsPbCl3/CsMnCl3核心/外NCs为实现更安全,更通用的无矿光电子设备提供了途径.
相关概念视频
02:42Ionic Crystal Structures
14.4K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.4K
01:06Interfacial Electrochemical Methods: Overview
256
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
256
03:45Formation of Complex Ions
23.7K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.7K
02:55Solubility of Ionic Compounds
63.3K
Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
63.3K
02:58Crystal Field Theory - Octahedral Complexes
26.6K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.6K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
42.7K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
42.7K