UV illumination enhanced desorption of oxygen molecules from monolayer MoS2 surface

作     者：Yuhang Wang Zhiquan He Jinbing Zhang Hao Liu Xubo Lai Boyang Liu Yibao Chen Fengping Wang Liuwan Zhang Yuhang Wang;Zhiquan He;Jinbing Zhang;Hao Liu;Xubo Lai;Boyang Liu;Yibao Chen;Fengping Wang;Liuwan Zhang

作者机构：Department of Applied PlhysicsSchool ofMathematics and PhysicsUniversity of Science and Techmology BejingBeijing 10083China State Key Laboratory of Low-Dimensional Quantum PhysicsCollaborative Innovation Center of Quantum MatterDepartment of PhysicsTsinghua UniversityBeijing 100084China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2020年第13卷第2期

页      面：358-365页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：This work is supported by the National Natural Science Foundation of China(Nos.11074142 and 11021464) Collaborative Innovation Center of Weak Signal-Detecting Materials and Devices Integration of Anhui University(No.01001795-201601) Fundam ental Research Funds for the Central Universities(No.FRP-TP-18-076A1) the China Postdoctoral Science Foundation(No.2017M610857) 

主　　题：MoS2 desorption ultraviolet(UV)ilumination oxygen adsorption carrier density 

摘      要：The oxygen adsorption can drastically alter the electronic properties of the two-dimensional(2D)materials,which is usually dificult to be *** this work,we report the ultraviolet(UV)ilumination induced desorption of the O2 molecules from the monolayer MoS2 surface by using the atmosphere dependent transport measurement,Kelvin probe microscopy,photoluminescence spectroscopy and X-ray photoelectron *** increasing of the conductivity,rising of the Fermi level,and red shift of the photoluminescence peaks of the MoS2 were observed after the UV ilumination in vacuum,indicating the elimination of the depletion effect from the oxygen *** parameter changes can be reversibly recovered by the subsequent O2 ***,obvious decreasing of the oxygen concentration after the UV ilumination was also observed by X-ray photoelectron *** the UV induced O2 photodesorption effect is *** photo-excited charge transfer mechanism is proposed to account for the photodesorption *** results provide a nondestructive way to clean the MoS2 surface and manipulate the performance of the MoS2 based devices.