Photoluminescence Study of B-Trions in MoS2 Monolayers with High Density of Defects
Research output: Contribution to journal › Article › Scientific › peer-review
- Tallinn University of Technology
Photoluminescence spectroscopy has been used to investigate the details of B band emission from single-layer MoS2 samples grown by chemical vapor deposition. The evolution of the peak shape upon variable excitation power is well described by a combination of exciton and trion contributions, from which B trion binding energy of 18 meV has been extracted. It has been suggested that the absence of accompanying A trion emission in our samples, as well as the enhanced intensity of the B band, can be ascribed to a fast non-radiative recombination channel arising from the large defect density in our samples. It has been found that band-selective recombination channels or formation of dark/bright trions are possible microscopic scenarios for our observations.
|Journal||Physica Status Solidi. B: Basic Research|
|Publication status||E-pub ahead of print - 1 Jan 2018|
|MoE publication type||A1 Journal article-refereed|
- chemical vapor deposition, monolayers, MoS, photoluminescence, trions