梯度掺杂半导体材料光催化研究进展
Research Progress in Photocatalytic of Gradient Doped Semiconductor Materials
庆达 1苏新悦 1王晓宇 1彭俊淇 1王建省 1赵英娜2
作者信息
- 1. 华北理工大学材料科学与工程学院,河北省无机非金属材料实验室,唐山 063210
- 2. 华北理工大学材料科学与工程学院,河北省无机非金属材料实验室,唐山 063210;河北省(唐山)陶瓷产业技术研究院,唐山 063007
- 折叠
摘要
提高光生载流子的分离效率是提升半导体材料光催化性能的有效途径之一.通常通过构建内建电场的方式来实现.然而,传统的异质结结构构建内建电场时需要半导体的能级相匹配,并且合成方式必须能够产生良好的界面接触,受到诸多条件限制.产生内建电场的另一种方法是构建同质结结构的内建电场,使用带隙相等但掺杂水平不同的同种半导体相互接触连接构成的同质结结构,相比于异质结,同样可以有效促进光生载流子的分离,而且由于只需要使用单一半导体材料,同质结的制备更为简便,已经在太阳能电池、光催化分解水制氢等诸多领域被应用.构建同质结结构最常用的一种方法是通过梯度掺杂在材料内部引入掺杂元素浓度阶梯式分布.文章介绍了梯度掺杂同质结半导体材料的光催化机理,并概述了梯度掺杂的不同掺杂方式及其在光催化领域的研究进展.
Abstract
Improving the separation efficiency of photogenerated carriers is one of the most effective ways to improve the photocatalytic performance of semiconductor materials.It is usually realized by building a built-in electric field.However,the traditional heterojunction structure needs to match the energy levels of semiconductors when constructing the built-in electric field,and the synthesis method must be able to produce good interface contact,which is limited by many conditions.Another method to generate the built-in electric field is to construct the built-in electric field of a homogeneous junction structure.Compared with heterojunction,the homojunction structure formed by contacting and connecting the same semiconductors with the same band gap but different doping levels can also effectively promote the separation of photogenerated carriers.Moreover,because only a single semiconductor material is needed,the preparation of homojunction is simpler,and it has been applied in solar cells,hydrogen production by photocatalytic decomposition of water and many other fields.One of the most commonly used methods to construct a homogeneous junction structure is to introduce a step-by-step distribution of doping element concentration in the material through gradient doping.In this paper,the photocatalytic mechanism of gradient doped homogeneous junction semiconductor materials is introduced,and the different doping methods of gradient doping and their research progress in the photocatalytic field are summarized.
关键词
梯度掺杂/掺杂方式/掺杂离子Key words
Gradient doping/Synthesis method/Doped ion引用本文复制引用
基金项目
唐山市科技局项目(21130211D)
河北省自然科学基金钢铁联合基金(E2021209002)
唐山市科技局项目(22130215H)
出版年
2024
NETL
NSTL
维普
万方数据