Exploring photogenerated charge carrier transfer in semiconductor/metal junctions using Kelvin probe force microscopy

Chuanbiao Bie ¹Zheng Meng ¹Bowen He ²Bei Cheng ²Gang Liu ³Bicheng Zhu¹

扫码查看

作者信息

1. Laboratory of Solar Fuel,Faculty of Materials Science and Chemistry,China University of Geosciences,Wuhan 430078,China
2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China
3. CAS Key Laboratory of Standardization and Measurement for Nanotechnology,National Center for Nanoscience and Technology,Beijing 100190,China
折叠

Abstract

Semiconductor/metal junctions are widely discussed in photocatalysis.However,there is a notable scarcity of systematic studies focusing on photogenerated charge carrier transfer in such junctions.Herein,CdS/Pt,CdS/Au,and CdS/Ag are synthesized to serve as model systems for investigating the charge carrier transfer in semiconductor/metal junctions.Kelvin probe force microscopy is employed to visualize the transfer of photogenerated carriers in these materials.The results show that the electron transfer be-havior under illumination is related to the conduction band position of CdS and the Fermi level position of the metal.Moreover,Schottky junctions hinder the transfer of photogenerated electrons from CdS to Pt and Au,whereas ohmic contacts facilitate the transfer of photogenerated electrons from CdS to Ag.This work provides novel insights into the mechanisms governing the transfer of photogenerated carriers in semiconductor/metal junctions.

Key words

Kelvin probe force microscopy/Surface potential/Work function/Contact potential difference/Charge carrier transfer

引用本文复制引用

基金项目

National Key Research and Development Program of China(2022YFB3803600)

National Natural Science Foundation of China(22238009)

National Natural Science Foundation of China(51932007)

National Natural Science Foundation of China(U1905215)

National Natural Science Foundation of China(52073223)

National Natural Science Foundation of China(22278324)

National Natural Science Foundation of China(52272290)

National Natural Science Foundation of China(52173065)

National Natural Science Foundation of China(22202187)

Natural Science Foundation of Hubei Province of China(2022CFA001)

National Postdoctoral Program for Innovative Talents(BX2021275)

China Postdoctoral Science Foundation(2022M712957)

China Scholarship Council(CSC)()

出版年

2024

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCD

影响因子：0.657

ISSN：1005-0302

参考文献量54

段落导航