摘要
We demonstrate a simple while very effective approach to tune the photoluminescence （PL） performance of monolayer MoS2 by dipping into the H2O2 aqueous solution, which is a strong oxidizer that extracts electrons from the MoS2 sheet within several seconds without damaging the crystal structure. During this process, the trion （electron-coupled exciton, X-） is transformed into an exciton （X°）, and thus achieves a greatly enhanced PL performance. These results indicate a convenient way to tune and to control the PL luminescence from monolayer MoS2 and thus lay a basis for the MoS2-based optoelectronic application.
We demonstrate a simple while very effective approach to tune the photoluminescence （PL） performance of monolayer MoS2 by dipping into the H2O2 aqueous solution, which is a strong oxidizer that extracts electrons from the MoS2 sheet within several seconds without damaging the crystal structure. During this process, the trion （electron-coupled exciton, X-） is transformed into an exciton （X°）, and thus achieves a greatly enhanced PL performance. These results indicate a convenient way to tune and to control the PL luminescence from monolayer MoS2 and thus lay a basis for the MoS2-based optoelectronic application.
基金
Supported by the National Basic Research Program of China under Grant Nos 2013CB932900 and 2013CBA01600
the National Natural Science Foundation of China under Grant Nos 61204050 and 60990314
