调控微波合成的钛掺杂硫化锌纳米颗粒中的电荷迁移率以用于潜在的光阳极应用

Modulating Charge Mobility in Microwave Synthesized Ti-doped ZnS Nanoparticles for Potential Photoanode Applications.

作者信息

Maswanganye Mpho W, Kabongo Guy L, Dhlamini Mokhotjwa S

机构信息

Department of Physics, College of Science Engineering and Technology, University of South Africa, Private Bag X6, Florida, Science Campus, Christiaan de Wet and Pioneer Avenue, Florida Park, Johannesburg 1710, South Africa.

出版信息

Nanomaterials (Basel). 2022 Dec 23;13(1):77. doi: 10.3390/nano13010077.

DOI:10.3390/nano13010077

PMID:36615987

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9824075/

Abstract

Doping ZnS nanoparticles with different metal and/or non-metal ions is one of the ways to improve their properties. That is because dopants introduce strain into the lattice of the ZnS nanoparticles. The influence of Ti on the ZnS nanoparticles was investigated on the structural properties, optical properties, and also electrical impedance spectroscopy (EIS). The presence of Ti in the crystal lattice of the ZnS introduced strain into the crystal structure, hence causing a lattice expansion and reducing the crystallite sizes of the ZnS nanoparticles. Ti doping was observed to increase the energy band gap of ZnS nanoparticles and also reduce the charge carrier recombination. Doping Ti into ZnS was observed to decrease the charge transfer resistance of ZnS nanoparticles with an increase in dopant concentration indicating an improved charge transfer mobility owing to the presence of strain in the crystal lattice.

摘要

用不同的金属和/或非金属离子掺杂硫化锌纳米颗粒是改善其性能的方法之一。这是因为掺杂剂会在硫化锌纳米颗粒的晶格中引入应变。研究了钛对硫化锌纳米颗粒的结构性能、光学性能以及电阻抗谱（EIS）的影响。锌硫晶体晶格中钛的存在使晶体结构产生应变，从而导致晶格膨胀并减小了硫化锌纳米颗粒的微晶尺寸。观察到钛掺杂会增加硫化锌纳米颗粒的能带隙，同时减少电荷载流子复合。观察到将钛掺杂到硫化锌中会随着掺杂剂浓度的增加而降低硫化锌纳米颗粒的电荷转移电阻，这表明由于晶格中存在应变，电荷转移迁移率得到了改善。