Self-Driven Photodetector and Ambipolar Transistor in Atomically Thin GaTe-MoS2 p–n vdW Heterostructure
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- 作者：Shengxue Yang ; Cong Wang ; Can Ataca ; Yan Li ; Hui Chen ; Hui Cai ; Aslihan Suslu ; Jeffrey C. Grossman ; Chengbao Jiang ; Qian Liu ; Sefaattin Tongay
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2016
- 出版时间：February 3, 2016
- 年：2016
- 卷：8
- 期：4
- 页码：2533-2539
- 全文大小：582K
- ISSN：1944-8252
文摘
Heterostructure engineering of atomically thin two-dimensional materials offers an exciting opportunity to fabricate atomically sharp interfaces for highly tunable electronic and optoelectronic devices. Here, we demonstrate abrupt interface between two completely dissimilar material systems, i.e, GaTe-MoS2 p–n heterojunction transistors, where the resulting device possesses unique electronic properties and self-driven photoelectric characteristics. Fabricated heterostructure transistors exhibit forward biased rectifying behavior where the transport is ambipolar with both electron and hole carriers contributing to the overall transport. Under illumination, photoexcited electron–hole pairs are readily separated by large built-in potential formed at the GaTe–MoS2 interface efficiently generating self-driven photocurrent within <10 ms. Overall results suggest that abrupt interfaces between vastly different material systems with different crystal symmetries still allow efficient charge transfer mechanisms at the interface and are attractive for photoswitch, photodetector, and photovoltaic applications because of large built-in potential at the interface.