Facile Preparation of Single MoS2 Atomic Crystals with Highly Tunable Photoluminescence by Morphology and Atomic Structure
Facile Preparation of Single MoS2 Atomic Crystals with Highly Tunable Photoluminescence by Morphology and Atomic Structure
复制标题
通过形态和原子结构轻松制备具有高度可调谐光致发光的单 MoS2 原子晶体
DOI：
10.1021/acs.cgd.6b01330
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发表时间：
2016-12-01
影响因子：
3.8
通讯作者：
Chang, Haixin
中科院分区：
文献类型：
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作者：
Li, Jie;Hu, Chenli;Chang, Haixin
制备具有高度可调谐光致发光特性的原子薄二维过渡金属二硫族化合物单原子晶体在二维光子学和光电子学中具有重要意义。然而，控制二维TMDs原子晶体中的PL仍然是一个很大的挑战，因为原子薄的二维性质导致比普通半导体更复杂和可变的PL行为。在本报告中，首次在单一生长衬底上通过单一化学气相沉积工艺同时制备了三角形和四边形MoS2原子晶体。通过控制生长动力学来降低成核密度，增加混合前驱体和其他生长参数的横向生长，可以有效地调节MoS2原子晶体的形貌和PL。优化后的二硫化钼三角形原子晶体的发光强度比经不同生长动力学调制的其他三角形晶体的发光强度高1 ~ 2个数量级。我…
To prepare atomically thin two-dimensional (2D) transition metal dichalcogenides (TMDs) single atomic crystals with highly tunable photoluminescence (PL) is of special importance in 2D photonics and optoelectronics. However, to control the PL in 2D TMDs atomic crystals is still a big challenge due to the atomically thin 2D nature which induces far more complicated and variable PL behaviors than normal semiconductors. In this report, triangular and tetragonal MoS2 atomic crystals are prepared simultaneously on one single growth substrate for the first time in a single chemical vapor deposition process. Through manipulating the growth dynamics to reduce nucleation density and enhance lateral growth with mixture precursor and other growth parameters, both the morphology and PL of the MoS2 atomic crystals can be efficiently modulated. The PL of the optimized triangular MoS2 atomic crystals can be over one to two orders higher than the PL of other triangular morphology modulated by different growth dynamics. I...