Assembling a Photoactive 2D Puzzle: From Bulk Powder to LargeArea Films of Semiconducting Transition-Metal Dichalcogenide Nanosheets

作     者：Rebekah A.Wells Kevin Sivula 

作者机构：Laboratory for Molecular Engineering of Optoelectronic NanomaterialsInstitute of Chemical Sciences and EngineeringÉcole Polytechnique FÉdÉrale de Lausanne1015 LausanneSwitzerland 

出 版 物：《Accounts of Materials Research》 (材料研究述评（英文）)

年 卷 期：2023年第4卷第4期

页      面：348-358页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：the Swiss National Science Foundation(Project No.200021_182666)for partially supporting this work 

主　　题：Transition critical sheets 

摘      要：Two-dimensional(2D)semiconducting materials are poised to revolutionize ultrathin,high-performance optoelectronic *** particular,transition-metal dichalcogenides(TMDs)are well-suited for applications requiring robust and stable materials such as electrocatalytic,photocatalytic,and photo-electrochemical *** of the most compelling assets of these materials is the ability to produce and process 2D TMDs in the nanosheet form using solution-based(SB)exfoliation *** to other methods,SB techniques are typically inexpensive,efficient,and more suitable for scale-up and industrial *** acknowledgment of the importance of this area,much work has been done to develop various SB methods starting from the exfoliation of bulk crystalline TMD materials to the chemical modification of final devices consisting of thin films of semiconducting 2D TMD ***,not all SB methods are equally compatible or interchangeable,and they result in very diverse material and device ***,the aim of this Account is to provide an overview of the developed SB techniques that can serve as a guide for assembling high-performance thin films of 2D *** start by introducing the most popular methods for producing 2D TMDs using liquid-phase exfoliation(LPE),discussing their working mechanisms as well as their advantages and *** we highlight a recently developed LPE technique using electro-intercalation that draws on the advantages of previously presented ***,we discuss processing the as-produced 2D TMD nanosheets via SB separating techniques designed for size and morphology selection while also presenting the ongoing challenges in this *** then examine SB methods for processing the selected 2D nanomaterial dispersions into semiconducting thin *** methods are compared and contrasted,and special attention is paid to a recently developed method that carefully deposits 2D TMD nanoflakes with preferentia