具有超低隧穿势垒的空气稳定性黑磷/磷脂纳米复合材料的液相批量制备
Liquid phase mass production of air-stable black phosphorus/phospholipids nanocomposite with ultralow tunneling barrier
摘要：
少层黑磷（FLBP）是近年来发现的一种二维半导体材料，由于其在电子和光电子领域的巨大应用潜力，引起了科学界和技术界的广泛关注。然而，FLBP薄片与环境物种的反应性限制了其直接应用。在环境中钝化FLBP的各种方法中，将FLBP薄片与稳定基体混合的纳米复合材料可能是最有前途的工业应用方法之一。在这里，我们报告了一个简单的一步程序，大量生产空气稳定的FLBP/磷脂纳米复合物在液相中。发现所得纳米复合材料具有超低的载流子隧穿势垒，其可以通过Efros-Shklovskii可变范围跳跃机制来描述。由这种大规模生产的FLBP/磷脂纳米复合材料制成的器件在环境条件下显示出高度稳定的电导率和光电响应，表明其在电子和光电应用中的前景。该方法也可推广到其它气敏二维材料如FeSe、NbSe_2、WTe_2等纳米复合材料的批量生产。
英文摘要：
Few-layer black phosphorus (FLBP), a recently discovered two-dimensional semiconductor, has attracted substantial attention in the scientific and technical communities due to its great potential in electronic and optoelectronic applications. However, reactivity of FLBP flakes with ambient species limits its direct applications. Among various methods to passivate FLBP in ambient environment, nanocomposites mixing FLBP flakes with stable matrix may be one of the most promising approaches for industry applications. Here, we report a simple one-step procedure to mass produce air-stable FLBP/phospholipids nanocomposite in liquid phase. The resultant nanocomposite is found to have ultralow tunneling barrier for charge carriers which can be described by an Efros-Shklovskii variable range hopping mechanism. Devices made from such mass-produced FLBP/phospholipids nanocomposite show highly stable electrical conductivity and opto-electrical response in ambient conditions, indicating its promising applications in both electronic and optoelectronic applications. This method could also be generalized to the mass production of nanocomposites consisting of other air-sensitive two-dimensional materials, such as FeSe, NbSe2, WTe2, etc.
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