Structure and Properties of Single-Layer MoS2 for Nano-Photoelectric Devices
| Autor: | Honglong Chang, Jiaying Jian, Tao Xu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Morphology (linguistics) single-layer MoS2 02 engineering and technology Chemical vapor deposition 010402 general chemistry 01 natural sciences lcsh:Technology Article chemical vapor deposition Crystal Nano Heating temperature General Materials Science Composite material lcsh:Microscopy lcsh:QC120-168.85 Range (particle radiation) heating temperature heating method lcsh:QH201-278.5 lcsh:T Photoelectric effect 021001 nanoscience & nanotechnology 0104 chemical sciences lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 Single layer |
| Zdroj: | Materials, Vol 12, Iss 2, p 198 (2019) Materials Volume 12 Issue 2 |
| ISSN: | 1996-1944 |
| Popis: | To meet the need for preparing high-performance nano-optoelectronic devices based on single-layer MoS2, the effects of the heating method (one-step or two-step heating) and the temperature of the MoO3 source on the morphology, size, structure, and layers of an MoS2 crystal grown on a sapphire substrate using chemical vapor deposition are studied in this paper. The results show that MoS2 prepared by two-step heating (the heating of the S source starts when the temperature of the MoO3 source rises to 837 K) is superior over that of one-step heating (MoO3 and S are heated at the same time). One-step heating tends to form a mixture of MoO2 and MoS2. Neither too low nor too high of a heating temperature of MoO3 source is conducive to the formation of MoS2. When the temperature of MoO3 source is in the range of 1073 K to 1098 K, the size of MoS2 increases with the rise in temperature. A uniform large-sized triangle with a side length of 100 &mu m is obtained when the heating temperature of MoO3 is 1098 K. The triangular MoS2 crystals grown by the two-step heating method have a single-layer structure. |
| Databáze: | OpenAIRE |
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