异质结
双极扩散
材料科学
范德瓦尔斯力
极性(国际关系)
光电子学
纳米技术
磁滞
电子
化学
凝聚态物理
分子
物理
量子力学
生物化学
有机化学
细胞
作者
Nengjie Huo,Juehan Yang,Le Huang,Zhongming Wei,Shu‐Shen Li,Su‐Huai Wei,Jingbo Li
出处
期刊:Small
[Wiley]
日期:2015-08-21
卷期号:11 (40): 5430-5438
被引量:116
标识
DOI:10.1002/smll.201501206
摘要
Van der Waals (vdW) p-n heterojunctions consisting of various 2D layer compounds are fascinating new artificial materials that can possess novel physics and functionalities enabling the next-generation of electronics and optoelectronics devices. Here, it is reported that the WSe2/WS2 p-n heterojunctions perform novel electrical transport properties such as distinct rectifying, ambipolar, and hysteresis characteristics. Intriguingly, the novel tunable polarity transition along a route of n-"anti-bipolar"-p-ambipolar is observed in the WSe2/WS2 heterojunctions owing to the successive work of conducting channels of junctions, p-WSe2 and n-WS2 on the electrical transport of the whole systems. The type-II band alignment obtained from first principle calculations and built-in potential in this vdW heterojunction can also facilitate the efficient electron-hole separation, thus enabling the significant photovoltaic effect and a much enhanced self-driven photoswitching response in this system.
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