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首页> 外文期刊>RSC Advances >Synergetic photoluminescence enhancement of monolayer MoS2 via surface plasmon resonance and defect repair
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Synergetic photoluminescence enhancement of monolayer MoS2 via surface plasmon resonance and defect repair

机译：通过表面等离子体激元共振和缺陷修复来协同增强单层MoS2的光致发光

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The weak light-absorption and low quantum yield (QY) in monolayer MoS _(2) are great challenges for the applications of this material in practical optoelectronic devices. Here, we report on a synergistic strategy to obtain highly enhanced photoluminescence (PL) of monolayer MoS _(2) by simultaneously improving the intensity of the electromagnetic field around MoS _(2) and the QY of MoS _(2) . Self-assembled sub-monolayer Au nanoparticles underneath the monolayer MoS _(2) and bis(trifluoromethane)sulfonimide (TFSI) treatment to the MoS _(2) surface are used to boost the excitation field and the QY, respectively. An enhancement factor of the PL intensity as high as 280 is achieved. The enhancement mechanisms are analyzed by inspecting the contribution of the PL spectra from A excitons and A ~(?) trions under different conditions. Our study takes a further step to developing high-performance optoelectronic devices based on monolayer MoS _(2) .
机译：单层MoS _（2）中的弱光吸收和低量子产率（QY）是该材料在实际光电器件中的应用面临的巨大挑战。在这里，我们报告了一种协同策略，可通过同时提高MoS _（2）周围的电磁场强度和MoS _（2）的QY来获得高度增强的单层MoS _（2）的光致发光（PL）。单层MoS_（2）下的自组装亚单层Au纳米颗粒和对MoS_（2）表面的双（三氟甲烷）磺酰亚胺（TFSI）处理分别用于增强激发场和QY。 PL强度的增强因子达到280。通过检查不同条件下A激子和A〜（β）三子的PL光谱的贡献来分析增强机理。我们的研究进一步迈出了开发基于单层MoS _（2）的高性能光电器件的一步。

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