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首页> 外文期刊>Advanced Functional Materials >Transition-Metal-Carbide (Mo_2C) Multiperiod Gratings for Realization of High-Sensitivity and Broad-Spectrum Photodetection
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Transition-Metal-Carbide (Mo_2C) Multiperiod Gratings for Realization of High-Sensitivity and Broad-Spectrum Photodetection

机译：过渡金属碳化物（Mo_2C）多周期光栅，用于实现高灵敏度和广谱光电检测

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摘要

A novel hybrid phototransistor consisting of molybdenum carbide (Mo2C) and molybdenum disulfide (MoS2) is proposed. By exploiting the interface properties of MoS2 and Mo2C, a highly sensitive and broad-spectral response photodetector is fabricated. The underlying mechanism of the enhanced performance is the efficient hot carrier injection from Mo2C to MoS2. The strong coupling of MoS2 and Mo2C at the interface provides the significantly low Schottky barrier height (approximate to 70 meV), which gives rise to the significantly efficient hot carrier transfer from Mo2C to MoS2. The grating of metallic Mo2C produces plasmonic resonance, which provides hot carriers to the MoS2 channel. By adjusting the grating period of Mo2C (400-1000 nm), the optimal photoresponse of light can be controlled, from visible to NIR. By integrating various Mo2C multigrating periods (400-1000 nm) with MoS2, a novel photodetector is demonstrated with high responsivity (R > 10(3) A W-1) and light-to-dark current ratio (>10(2)) over a broad spectral range (405-1310 nm). The proposed novel hybrid photodetector, 2D semiconductors with multigrating 2D metallic stripes, exhibits high sensitivity and broad spectral detection of light and can overcome the inherent weakness of conventional 2D photodetectors, paving the way forward for next-generation photoelectric devices.
机译：提出了一种由碳化钼（Mo2C）和二硫化钼（MoS2）组成的新型混合光电晶体管。通过利用MoS2和Mo2C的界面特性，制造了高灵敏度和广谱响应的光电探测器。增强性能的根本机制是从Mo2C到MoS2的有效热载流子注入。 MoS2和Mo2C在界面处的强耦合提供了非常低的肖特基势垒高度（约70 meV），这导致了从Mo2C到MoS2的高效热载流子转移。金属Mo2C的光栅产生等离子体共振，从而为MoS2通道提供热载流子。通过调节Mo2C（400-1000 nm）的光栅周期，可以控制从可见光到近红外的最佳光响应。通过将各种Mo2C多重光栅周期（400-1000 nm）与MoS2集成在一起，证明了一种新型光电探测器具有高响应度（R> 10（3）A W-1）和明暗电流比（> 10（2））在较宽的光谱范围内（405-1310 nm）。提出的新型混合光电探测器，具有多光栅2D金属条纹的2D半导体，具有高灵敏度和广谱光检测能力，可以克服传统2D光电探测器固有的弱点，为下一代光电器件铺平了道路。

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