Luminescent MoS₂ Quantum Dots with Tunable Operating Potential for Energy-Enhanced Aqueous Supercapacitors.

ABSTRACT: Wide band gap luminescent MoS₂ quantum dots (QDs) and MoS₂ nanocrystals (NCs) have been synthesized by using laser-assisted chemical vapour deposition and used as an electrode material in supercapacitors. Size-dependent properties of the MoS₂ QDs and NCs were examined by UV-vis absorption, photoluminescence, and Raman spectroscopy. The morphological evolution of the NCs and QDs were characterized by using field emission scanning electron microscopy, high-resolution transmission electron microscopy, and atomic force microscopy. The as-synthesized uniform QDs with a size of ∼2 nm exhibited an extended electrochemical potential window of 0.9 V with a specific capacitance value of 255 F/g, while the NCs values were 205 F/g and 0.8 V and the pristine MoS_2</

SUBMITTER: Panchu SJ 

PROVIDER: S-EPMC7905822 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature