Phosphorene: an unexplored 2D semiconductor with a high hole mobility.
By Han Liu, A. Neal, Zhen Zhu, Zhe Luo, Xianfan Xu, David Tománek, Peide D. Ye. ACS Nano, 2014
4,697 citations recorded by the source corpus.
We introduce the 2D counterpart of layered black phosphorus, which we call phosphorene, as an unexplored p-type semiconducting material. Same as graphene and MoS2, single-layer phosphorene is flexible and can be mechanically exfoliated. We find phosphorene to be stable and, unlike graphene, to have an inherent, direct, and appreciable band gap. Our ab initio calculations indicate that the band gap is direct, depends on the number of layers and the in-layer strain, and is significantly larger than the bulk value of 0.31-0.36 eV. The observed photoluminescence peak of single-layer phosphorene in the visible optical range confirms that the band gap is larger than that of the bulk system. Our transport studies indicate a hole mobility that reflects the structural anisotropy of phosphorene and complements n-type MoS2. At room temperature, our few-layer phosphorene field-effect transistors with 1.0 μm channel length display a high on-current of 194 mA/mm, a high hole field-effect mobility of 286 cm(2)/V·s, and an on/off ratio of up to 10(4). We demonstrate the possibility of phosphorene integration by constructing a 2D CMOS inverter consisting of phosphorene PMOS and MoS2 NMOS transistors.
Subfields: Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/097786ba89560b21027496ff7103186670233a8f
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In Materials Chemistry
Citations in the corpus
- Ultrahigh sensitivity and layer-dependent sensing performance of phosphorene-based gas sensors (2015, neutral): “Bulk BP is a p -type semiconducting material with a direct band gap of B 0.3eV (refs 12–14) and the field-effect mobility of BP is dependent on its thickness 13 .”
- Recent Advances in the Study of Phosphorene and its Nanostructures (2017, background): “anisotropy in the electro-optical and thermo-mechanical properties, distinguishing it from other 2D materials.(19) One of the evident advantages of phosphorene is its sizable direct band gap, which can be optimized by the”