Table 1. Summary of Monolayer Volume Fraction (Vf), Position of Monolayer A-Exciton Peak (EAML), Center and Full Width at Half-Maximum (fwhm) of PL Spectra, and Position and Average Exciton Lifetime ⟨τ⟩ of A-Exciton Ground State Bleach (GSB) from Pump–Probe Measurements.
sample | ML Vf (%) | EAML (abs, eV) | EAML (PL, eV) | fwhm (PL, meV) | EAML (GSB, eV) | ⟨τ⟩ (AM-exciton GSB, ps) | ⟨τ⟩ (AFL-exciton GSB, ps) |
---|---|---|---|---|---|---|---|
LPE 10–30k g WS2/H2O | 78 | 2.029 | 2.029 | 19 | 2.029 | 481 | 325 |
LPE 10–30k g WS2/IPA | 35 | 2.019 | 2.019 | 19 | 2.019 | 231 | 759 |
ME untreated WS2 | 1.981 | 44 | 2.006 | 6 | |||
ME Li-TFSI treated WS2 | 2.013 | 10 | 2.013 | 90 |