Light-Tunable Polarity and Erasable Physisorption-Induced Memory Effect in Vertically Stacked InSe/SnS2 Self-Powered Photodetector.
Light-Tunable Polarity and Erasable Physisorption-Induced Memory Effect in Vertically Stacked InSe/SnS2 Self-Powered Photodetector.
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DOI：
10.1021/acsnano.2c08177
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发表时间：
2022-09
期刊：
影响因子：
17.1
通讯作者：
Yue Zhao;Jiung Cho;Miri Choi;C. Ó Coileáin;S. Arora;K. Hung;Ching-Ray Chang;M. Abid;
中科院分区：
文献类型：
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作者：
Yue Zhao;Jiung Cho;Miri Choi;C. Ó Coileáin;S. Arora;K. Hung;Ching-Ray Chang;M. Abid;
具有可调极性的货车德瓦耳斯异质结正被积极地探索用于更多的摩尔和更多的超过摩尔的器件应用，因为它们可以极大地简化电路设计。然而，对多功能操作状态的控制不足仍然是其发展中的一个挑战。在这里，我们表明，垂直堆叠的InSe/SnS 2货车德瓦尔斯异质结具有II型能带排列，其极性可以通过外部电场和照明光源的波长和强度进行调谐。此外，这种SnS 2/InSe二极管是具有良好性能的自供电宽带光电探测器。自供电性能可以通过气体吸附进一步显著增强，并且器件可以使用栅极电压脉冲快速恢复到气体注入之前的状态。我们的研究结果提出了一种方法来实现和设计多个功能在一个单一的设备与多场耦合的光，电场，气体，或其他外部刺激。
van der Waals heterojunctions with tunable polarity are being actively explored for more Moore and more-than-Moore device applications, as they can greatly simplify circuit design. However, inadequate control over the multifunctional operational states is still a challenge in their development. Here, we show that a vertically stacked InSe/SnS2 van der Waals heterojunction exhibits type-II band alignment, and its polarity can be tuned by an external electric field and by the wavelength and intensity of an illuminated light source. Moreover, such SnS2/InSe diodes are self-powered broadband photodetectors with good performance. The self-powered performance can be further enhanced significantly with gas adsorption, and the device can be quickly restored to the state before gas injection using a gate voltage pulse. Our results suggest a way to achieve and design multiple functions in a single device with multifield coupling of light, electrical field, gas, or other external stimulants.