期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 863, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.158366
关键词
First principals; P-type doping; Thin films; Schottky diode; Photocatalytic
资金
- Begum Rokeya University, Rangpur, Ragpur, Bangladesh
MoS2 is an alternative to graphene with intriguing properties, requiring modification for achieving p-MoS2 and complementary device applications. Doping with Ag and Ag-Cu has been investigated both theoretically and experimentally, revealing enhanced absorption in the visible region and confirmation of p-type MoS2 characteristics.
MoS2 is an alternative of graphene due to its intriguing properties and it is necessary to modify the properties for achieving p-MoS2 and complementary device applications. Doping is one of the most prevalent techniques for modification of materials properties and fabricating p-MoS2. Herein, we report on Ag and Ag-Cu doped MoS2 investigated by theoretical and experimental studies. Detailed study of DFT highlights the confirmation of p-type MoS2. The band gap can be tuned from 1.21 to 0.51 eV (theoretically) and 1.92-1.30 eV (experimentally). The enhancement of absorption in the visible region attributed to Ag and Ag-Cu doping. The conduction band (CB) edge potential is smaller in negative than H+/H-2 (0.0 eV) for undoped, Ag = 2.5% and Ag-Cu (Ag = 2.5, Cu = 10%) doped MoS2, hence the photogenerated electrons can weakly reduce H+ to produce H-2. While the deeper valence band (VB) edge potential than O-2/H2O (1.23 eV) confirms that the holes created upon photon absorption strongly shows the ability for water oxidation. However for other doping both potential edges are more positive which insights strong oxidative material. Interestingly, the theoretical calculation suggests that the CB edge potential should be upward shifting for enhancing the photocatalytic activity of MoS2. EDX and XPS measurements disclose the presence of Mo, S, Ag and Cu elements in the thin films. Furthermore, decreasing forward current and shifting threshold voltage (VT) toward higher voltage in (Ag, Cu) doped Au/Mo100-x-yAgxCuyS2 insights p-type MoS2. Therefore, these demonstrations could be extended its applications to be enable high-performance electronic and optoelectronic devices. (C) 2020 Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据