Long-term stability study of graphene-passivated black phosphorus under air exposure
Long-term stability study of graphene-passivated black phosphorus under air exposure
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DOI：
10.1016/j.cap.2015.11.010
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发表时间：
2016-02-01
影响因子：
2.4
通讯作者：
Choi, E. J.
中科院分区：
文献类型：
--
作者：
Kim, Jiho;Baek, Seung Kwan;Choi, E. J.
我们使用石墨烯作为钝化层来保护黑磷不与空气发生化学反应。在黑磷晶体的薄片上覆盖N = 1、2和3层CVD石墨烯，并在样品暴露于空气后测量拉曼声子模式。对于双层和三层钝化（N = 2,3），在声子强度降低到初始强度的90% （I/I-0 = 0.9）之前，拉曼声子峰保持了大约100 h（4天）的时间，表明与裸层和单层覆盖的黑磷的快速降解相比，黑磷得到了强有力的保护。多层石墨烯钝化所获得的长期稳定性，使得在环境下进行各种电子和光学实验成为可能，这些实验旨在实现这种具有高电子和热迁移率的直接间隙范德华半导体的器件应用。(C) 2015 Elsevier B.V.版权所有
We use the graphene as a passivation layer to protect the black phosphorus from chemical reaction with air. Flakes of the black phosphorus crystal are covered by N = 1, 2, and 3 layers of CVD graphene and the Raman phonon modes are measured after the samples are exposed to air. For the double and triple layer passivation (N = 2,3) the Raman phonon peaks are maintained as long as similar to 100 h (4 days) before the phonon intensity is reduced to 90% of the initial strength, I/I-0 = 0.9, demonstrating that the black phosphorus is strongly protected in contrast to the rapid degradation of the bare and single-layer covered black phosphorus. The long term stability achieved by multi-layer graphene passivation makes it possible to perform various electronic and optical experiments aimed for device application of this direct-gap van der Waals semiconductor with high electronic and thermal mobility under ambient environment. (C) 2015 Elsevier B.V. All rights reserved.