A Mixed-Dimensional van der Waals Heterostructure Photodetector.
A Mixed-Dimensional van der Waals Heterostructure Photodetector.
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DOI：
10.1021/acsami.0c01076
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发表时间：
2020-03
影响因子：
9.5
通讯作者：
Jiao-yan Zhou;Mingzhang Xie;H. Ji;Anyang Cui;Yan Ye;K. Jiang;Liyan Shang;Jinzhong Zhang;Zhigao Hu;J. Chu
中科院分区：
文献类型：
--
作者：
Jiao-yan Zhou;Mingzhang Xie;H. Ji;Anyang Cui;Yan Ye;K. Jiang;Liyan Shang;Jinzhong Zhang;Zhigao Hu;J. Chu
范德华（vdW）异质结构，集成了二维（2D）材料和各种功能材料，为下一代光电子产品提供了独特的平台，具有独特的灵活性和高性能。然而，迄今为止，对vdW异质结构与强相关电子材料结合的研究还很少。本文提出了一种基于GaSe/VO$_{2}$混合维vdW异质结构的新型温敏光电探测器。与以前的器件相比，我们的光电探测器表现出优异的性能，在405 nm激光下，外量子效率高达109.6%，响应率最高（358.1 mA$\cdot$W$^{-1}$）。有趣的是，我们发现异质结构克服了单一材料在VO$_{2}$与GaSe相互作用下的限制，其中光响应对温度高度敏感，并且可以在临界值处进一步关闭。VO$_{2}$的金属-绝缘体跃迁控制了异质界面上特殊的能带结构演变，并被证明可以操纵光响应的变化。本研究使我们能够阐明利用强相关电子材料操纵二维材料的方法，为开发高性能和特殊光电应用铺平了道路。
Van der Waals (vdW) heterostructures, integrated two-dimensional (2D) materials with variously functional materials, provide a distinctive platform for next-generation optoelectronics with unique flexibility and high performance. However, exploring the vdW heterostructures combined with strongly correlated electronic materials is hitherto rare. Herein, a novel temperature-sensitive photodetector based on the GaSe/VO$_{2}$ mixed-dimensional vdW heterostructure is discovered. Compared with previous devices, our photodetector exhibits excellently enhanced performance, with external quantum efficiency up to 109.6 \% and the highest responsivity (358.1 mA$\cdot$W$^{-1}$) under a 405 nm laser. Interestingly, we show that the heterostructure overcomes the limitation of a single material under the interaction between VO$_{2}$ with GaSe, where photoresponse is highly sensitive to temperature and can be further shut at the critical value. The metal-insulator transition of VO$_{2}$, which controls the peculiar band-structure evolution across the heterointerface, is demonstrated to manipulate the photoresponse variation. This study enables us to elucidate the method of manipulating 2D materials by strongly correlated electronic materials, paving the way for developing the high-performance and special optoelectronic application.