[Paper]Complementary Unipolar WS2 Field-Effect Transistors Using Fermi-Level Depinning Layers

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Woojin Park,Yonghun Kim,Ukjin Jung, Jin Ho Yang, Chunhum Cho, Yun Ji Kim, Syed Mohammad Najib Hasan, Hyun Gu Kim, Han Bo Ram Lee, Byoung Hun Lee

Advanced electronic materials.

DOI : http://dx.doi.org/10.1002/aelm.201500278

Abstract

High contact resistance and symmetrical conduction are serious challenges in practical applications of transition metal dichalcogenide (TMD) field-effect transistors (FETs). Unipolar behavior and reduced contact resistance are achieved for tungsten disulfide (WS2) FETs by using a TiO2 interfacial layer inserted between a metal layer and a WS2 layer.