Type-I Ca(OH)2/α-MoTe2 vdW heterostructure for ultraviolet optoelectronic device applications: electric field effects

Type-I Ca(OH)2/α-MoTe2 vdW heterostructure for ultraviolet optoelectronic device applications: electric field effects
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用于紫外光电器件应用的 I 型 Ca(OH)2/α-MoTe2 vdW 异质结构:电场效应

DOI:
10.1039/c7tc03779a
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发表时间:
2017-12
影响因子:
6.4
通讯作者:
Li Jingbo
Li Jingbo
中科院分区:
材料科学2区
文献类型:
--
作者:
Gao Qiang;Congxin Xia;Wenqi Xiong;Du Juan;Wang Tianxing;Wei Zhongming;Li Jingbo

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货车德瓦耳斯(vdW)异质结构作为构建未来纳米器件的独特构件正引起人们的广泛关注。本文通过第一性原理计算,系统地预测了Ca(OH)2/α-MoTe 2 vdW异质结的稳定性、电子结构、能带排列、界面电荷转移和光吸收,并考虑了堆叠模式和电场效应.研究表明,该异质结构具有直接能带结构、I型取向、高紫外吸收强度(~ 105 cm−1)和宽带光谱等突出特点。此外,外部电场可以将能带对准变换从I型调谐到II型。这些结果表明,Ca(OH)2/α-MoTe 2 vdW异质结构在紫外光电子器件中具有良好的应用前景。
The van der Waals (vdW) heterostructure is attracting intensive attention as a unique building block in the construction of future nano-devices. In this work, through first-principle calculations, we systemically predict the stability, electronic structures, band alignment, interface charge transfer and optical absorption of a Ca(OH)2/α-MoTe2 vdW heterostructure, considering stacking patterns and electric field (E-field) effects. The studies show that the heterostructure possesses the outstanding characteristics of direct band structures, type-I alignment, high ultraviolet absorption strength (∼105 cm−1) and broadband spectrum. Moreover, the external E-fields can tune the band alignment transformation from type I to type II. These results indicate that the Ca(OH)2/α-MoTe2 vdW heterostructure will be a promising candidate for ultraviolet optoelectronic device applications.
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发表时间: 2006-11-30
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