Hybrid, Gate-Tunable, van der Waals p–n Heterojunctions from Pentacene and MoS2

详细信息    查看全文

• 作者：Deep Jariwala ; Sarah L. Howell ; Kan-Sheng Chen ; Junmo Kang ; Vinod K. Sangwan ; Stephen A. Filippone ; Riccardo Turrisi ; Tobin J. Marks ; Lincoln J. Lauhon ; Mark C. Hersam
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：January 13, 2016
• 年：2016
• 卷：16
• 期：1
• 页码：497-503
• 全文大小：496K
• ISSN：1530-6992

文摘

The recent emergence of a wide variety of two-dimensional (2D) materials has created new opportunities for device concepts and applications. In particular, the availability of semiconducting transition metal dichalcogenides, in addition to semimetallic graphene and insulating boron nitride, has enabled the fabrication of “all 2D” van der Waals heterostructure devices. Furthermore, the concept of van der Waals heterostructures has the potential to be significantly broadened beyond layered solids. For example, molecular and polymeric organic solids, whose surface atoms possess saturated bonds, are also known to interact via van der Waals forces and thus offer an alternative for scalable integration with 2D materials. Here, we demonstrate the integration of an organic small molecule p-type semiconductor, pentacene, with a 2D n-type semiconductor, MoS₂. The resulting p–n heterojunction is gate-tunable and shows asymmetric control over the antiambipolar transfer characteristic. In addition, the pentacene/MoS₂ heterojunction exhibits a photovoltaic effect attributable to type II band alignment, which suggests that MoS₂ can function as an acceptor in hybrid solar cells.